[TEST] Replace _source.mode with index.mapping.source.mode in integration tests (#115926)

* Replace _source.mode with index.mapping.source.mode in integration tests

* fix tests

* revert 40_source_mode_setting.yml

modules/aggregations/src/yamlRestTest/resources/rest-api-spec/test/aggregations/top_hits.yml

@@ -356,9 +356,10 @@ synthetic _source:
       indices.create:
         index: test_synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               page:
                 type: keyword

modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/50_script_doc_values.yml

@@ -180,9 +180,9 @@ setup:
         body:
           settings:
             number_of_shards: 1
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               boolean:
                 type: boolean
@@ -5630,9 +5630,9 @@ version and sequence number synthetic _source:
         body:
           settings:
             number_of_shards: 1
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword

modules/mapper-extras/src/yamlRestTest/resources/rest-api-spec/test/match_only_text/10_basic.yml

@@ -285,9 +285,10 @@ synthetic_source:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               foo:
                 type: match_only_text
@@ -362,9 +363,10 @@ synthetic_source with copy_to:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               foo:
                 type: match_only_text

modules/mapper-extras/src/yamlRestTest/resources/rest-api-spec/test/rank_feature/30_synthetic_source.yml

@@ -7,9 +7,10 @@ setup:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               pagerank:
                 type: rank_feature

modules/mapper-extras/src/yamlRestTest/resources/rest-api-spec/test/rank_features/20_synthetic_source.yml

@@ -7,9 +7,10 @@ setup:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               tags:
                 type: rank_features

modules/mapper-extras/src/yamlRestTest/resources/rest-api-spec/test/search-as-you-type/30_synthetic_source.yml

@@ -7,9 +7,10 @@ setup:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a_field:
                 type: search_as_you_type

modules/mapper-extras/src/yamlRestTest/resources/rest-api-spec/test/token_count/10_basic.yml

@@ -42,9 +42,10 @@
       indices.create:
         index:  test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               count:
                 type: token_count

modules/parent-join/src/yamlRestTest/resources/rest-api-spec/test/60_synthetic_source.yml

@@ -7,9 +7,10 @@ supported:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               join_field:
                 type: join

modules/percolator/src/yamlRestTest/resources/rest-api-spec/test/10_basic.yml

@@ -137,9 +137,10 @@
       indices.create:
         index: queries_index
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               query:
                 type: percolator

modules/reindex/src/yamlRestTest/resources/rest-api-spec/test/reindex/110_synthetic_source.yml

@@ -3,9 +3,10 @@ setup:
       indices.create:
         index: synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword

modules/reindex/src/yamlRestTest/resources/rest-api-spec/test/update_by_query/100_synthetic_source.yml

@@ -3,9 +3,10 @@ update:
       indices.create:
         index: synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword

modules/runtime-fields-common/src/yamlRestTest/resources/rest-api-spec/test/runtime_fields/270_synthetic_source.yml

@@ -8,9 +8,10 @@ keywords:
       indices.create:
         index: index1
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               field1:
                 type: keyword
@@ -76,9 +77,10 @@ doubles:
       indices.create:
         index: index1
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               field1:
                 type: double

plugins/mapper-annotated-text/src/yamlRestTest/resources/rest-api-spec/test/mapper_annotatedtext/20_synthetic_source.yml

@@ -10,9 +10,10 @@ stored annotated_text field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -40,9 +41,10 @@ annotated_text field with keyword multi-field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -72,9 +74,10 @@ multiple values in stored annotated_text field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -102,9 +105,10 @@ multiple values in annotated_text field with keyword multi-field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -135,9 +139,10 @@ multiple values in annotated_text field with stored keyword multi-field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -169,9 +174,10 @@ multiple values in stored annotated_text field with keyword multi-field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text
@@ -202,9 +208,10 @@ fallback synthetic source:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               annotated_text:
                 type: annotated_text

plugins/mapper-murmur3/src/yamlRestTest/resources/rest-api-spec/test/mapper_murmur3/10_basic.yml

@@ -134,9 +134,10 @@ setup:
       indices.create:
         index: test_synthetic_source
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               foo:
                 type: keyword

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/get/100_synthetic_source.yml

@@ -7,9 +7,10 @@ keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -48,9 +49,8 @@ fetch without refresh also produces synthetic source:
           settings:
             index:
               refresh_interval: -1
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               obj:
                 properties:
@@ -90,9 +90,10 @@ force_synthetic_source_ok:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: stored
           mappings:
-            _source:
-              mode: stored
             properties:
               obj:
                 properties:
@@ -139,9 +140,10 @@ stored text:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               text:
                 type: text
@@ -212,9 +214,10 @@ stored keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -253,9 +256,10 @@ doc values keyword with ignore_above:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -336,9 +340,10 @@ stored keyword with ignore_above:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -421,9 +426,10 @@ indexed dense vectors:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -465,9 +471,10 @@ non-indexed dense vectors:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -508,9 +515,10 @@ _source filtering:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -550,9 +558,9 @@ _doc_count:
       indices.create:
         index: test
         body:
-          mappings:
+          settings:
-            _source:
+            index:
-              mode: synthetic
+              mapping.source.mode: synthetic
 
   # with _doc_count
   - do:
@@ -679,9 +687,10 @@ fields with ignore_malformed:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               ip:
                 type: ip
@@ -914,9 +923,10 @@ flattened field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               flattened:
                 type: flattened
@@ -1006,9 +1016,10 @@ flattened field with ignore_above:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               field:
                 type: flattened
@@ -1061,9 +1072,10 @@ flattened field with ignore_above and arrays:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               field:
                 type: flattened
@@ -1117,9 +1129,10 @@ completion:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               completion:
                 type: completion

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/indices.create/20_synthetic_source.yml

@@ -11,13 +11,11 @@ object with unmapped fields:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 total_fields:
                   ignore_dynamic_beyond_limit: true
                   limit: 1
-
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -64,13 +62,12 @@ unmapped arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 total_fields:
                   ignore_dynamic_beyond_limit: true
                   limit: 1
 
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -111,13 +108,12 @@ nested object with unmapped fields:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 total_fields:
                   ignore_dynamic_beyond_limit: true
                   limit: 3
 
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -163,13 +159,12 @@ empty object with unmapped fields:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 total_fields:
                   ignore_dynamic_beyond_limit: true
                   limit: 3
 
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -205,9 +200,10 @@ disabled root object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             enabled: false
 
   - do:
@@ -242,9 +238,10 @@ disabled object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 enabled: false
@@ -279,9 +276,10 @@ disabled object contains array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 enabled: false
@@ -319,9 +317,10 @@ disabled subobject:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -357,9 +356,10 @@ disabled subobject with array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -396,9 +396,10 @@ mixed disabled and enabled objects:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -442,9 +443,10 @@ object with dynamic override:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path_no:
                 dynamic: false
@@ -489,9 +491,10 @@ subobject with dynamic override:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -537,9 +540,10 @@ object array in object with dynamic override:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -591,9 +595,10 @@ value array in object with dynamic override:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path_no:
                 dynamic: false
@@ -634,9 +639,10 @@ nested object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               nested_field:
                 type: nested
@@ -679,9 +685,10 @@ nested object next to regular:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               path:
                 properties:
@@ -725,9 +732,10 @@ nested object with disabled:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               obj_field:
                 properties:
@@ -813,9 +821,10 @@ doubly nested object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               obj_field:
                 properties:
@@ -908,9 +917,10 @@ subobjects auto:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             subobjects: auto
             properties:
               id:
@@ -996,9 +1006,10 @@ synthetic_source with copy_to:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               number:
                 type: integer
@@ -1132,9 +1143,10 @@ synthetic_source with disabled doc_values:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               number:
                 type: integer
@@ -1215,9 +1227,10 @@ fallback synthetic_source for text field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               text:
                 type: text
@@ -1249,9 +1262,10 @@ synthetic_source with copy_to and ignored values:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1317,9 +1331,10 @@ synthetic_source with copy_to field having values in source:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1380,9 +1395,10 @@ synthetic_source with ignored source field using copy_to:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1444,9 +1460,10 @@ synthetic_source with copy_to field from dynamic template having values in sourc
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             dynamic_templates:
               - copy_template:
                   match: "k"
@@ -1541,9 +1558,10 @@ synthetic_source with copy_to and invalid values for copy:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1577,9 +1595,10 @@ synthetic_source with copy_to pointing inside object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1681,9 +1700,10 @@ synthetic_source with copy_to pointing to ambiguous field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               k:
                 type: keyword
@@ -1728,9 +1748,10 @@ synthetic_source with copy_to pointing to ambiguous field and subobjects false:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             subobjects: false
             properties:
               k:
@@ -1776,9 +1797,10 @@ synthetic_source with copy_to pointing to ambiguous field and subobjects auto:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             subobjects: auto
             properties:
               k:
@@ -1825,9 +1847,10 @@ synthetic_source with copy_to pointing at dynamic field:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1911,9 +1934,10 @@ synthetic_source with copy_to pointing inside dynamic object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/indices.create/21_synthetic_source_stored.yml

@@ -8,9 +8,10 @@ object param - store complex object:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -72,9 +73,10 @@ object param - object array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -136,9 +138,10 @@ object param - object array within array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               stored:
                 synthetic_source_keep: arrays
@@ -179,9 +182,10 @@ object param - no object array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               stored:
                 synthetic_source_keep: arrays
@@ -221,9 +225,10 @@ object param - field ordering in object array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a:
                 type: keyword
@@ -270,9 +275,10 @@ object param - nested object array next to other fields:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a:
                 type: keyword
@@ -326,9 +332,10 @@ object param - nested object with stored array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -378,9 +385,10 @@ index param - nested array within array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -428,9 +436,9 @@ index param - nested array within array - disabled second pass:
             index:
               synthetic_source:
                 enable_second_doc_parsing_pass: false
+              mapping.source.mode: synthetic
+
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -478,9 +486,8 @@ stored field under object with store_array_source:
             index:
               sort.field: "name"
               sort.order: "asc"
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -525,9 +532,10 @@ field param - keep root array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -582,9 +590,10 @@ field param - keep nested array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -650,9 +659,10 @@ field param - keep root singleton fields:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -739,9 +749,10 @@ field param - keep nested singleton fields:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -820,9 +831,10 @@ field param - nested array within array:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -866,10 +878,9 @@ index param - root arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -945,10 +956,9 @@ index param - dynamic root arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               id:
                 type: integer
@@ -998,10 +1008,9 @@ index param - object array within array:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               stored:
                 properties:
@@ -1048,10 +1057,9 @@ index param - no object array:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               stored:
                 properties:
@@ -1093,10 +1101,9 @@ index param - field ordering:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a:
                 type: keyword
@@ -1144,10 +1151,9 @@ index param - nested arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a:
                 type: keyword
@@ -1212,10 +1218,9 @@ index param - nested object with stored array:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -1264,10 +1269,9 @@ index param - flattened fields:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 synthetic_source_keep: arrays
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/indices.put_mapping/10_basic.yml

@@ -145,28 +145,6 @@
   - is_false: test_index.mappings.properties.foo.meta.bar
   - match: { test_index.mappings.properties.foo.meta.baz: "quux" }
 
----
-"disabling synthetic source fails":
-  - requires:
-      cluster_features: ["gte_v8.4.0"]
-      reason:      "Added in 8.4.0"
-
-  - do:
-      indices.create:
-        index: test_index
-        body:
-          mappings:
-            _source:
-              mode: synthetic
-
-  - do:
-      catch: /Cannot update parameter \[mode\] from \[synthetic\] to \[stored\]/
-      indices.put_mapping:
-        index: test_index
-        body:
-          _source:
-            mode: stored
-
 ---
 "enabling synthetic source from explicit succeeds":
   - requires:
@@ -177,9 +155,9 @@
       indices.create:
         index: test_index
         body:
-          mappings:
+          settings:
-            _source:
+            index:
-              mode: stored
+              mapping.source.mode: stored
 
   - do:
       indices.put_mapping:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/logsdb/20_source_mapping.yml

@@ -30,9 +30,7 @@ stored _source mode is supported:
           settings:
             index:
               mode: logsdb
-          mappings:
+              mapping.source.mode: stored
-            _source:
-              mode: stored
   - do:
       indices.get:
         index: test-stored-source
@@ -69,9 +67,7 @@ disabled _source is not supported:
           settings:
             index:
               mode: logsdb
-          mappings:
+              mapping.source.mode: disabled
-            _source:
-              mode: disabled
 
   - match: { error.type: "mapper_parsing_exception" }
   - match: { error.root_cause.0.type: "mapper_parsing_exception" }
@@ -120,9 +116,9 @@ include/exclude is supported with stored _source:
           settings:
             index:
               mode: logsdb
+              mapping.source.mode: stored
           mappings:
             _source:
-              mode: stored
               includes: [a]
 
   - do:
@@ -139,9 +135,9 @@ include/exclude is supported with stored _source:
           settings:
             index:
               mode: logsdb
+              mapping.source.mode: stored
           mappings:
             _source:
-              mode: stored
               excludes: [b]
 
   - do:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/mget/90_synthetic_source.yml

@@ -7,9 +7,10 @@ keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -62,9 +63,9 @@ keyword with normalizer:
                   type: custom
                   filter:
                     - lowercase
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword
@@ -144,9 +145,10 @@ stored text:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               text:
                 type: text
@@ -193,9 +195,10 @@ force_synthetic_source_ok:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: stored
           mappings:
-            _source:
-              mode: stored
             properties:
               obj:
                 properties:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search.highlight/50_synthetic_source.yml

@@ -9,9 +9,9 @@ setup:
         body:
           settings:
             number_of_shards: 1
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               foo:
                 type: keyword
@@ -21,6 +21,7 @@ setup:
                     index_options: positions
                   vectors:
                     type: text
+                    store: false
                     term_vector: with_positions_offsets
                   positions:
                     type: text

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search.vectors/90_sparse_vector.yml

@@ -394,9 +394,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               ml.tokens:
                 type: sparse_vector

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search/350_binary_field.yml

@@ -55,9 +55,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               binary:
                 type: binary

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search/400_synthetic_source.yml

@@ -7,9 +7,10 @@ keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -44,9 +45,10 @@ stored text:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               text:
                 type: text
@@ -83,8 +85,6 @@ stored keyword:
         index: test
         body:
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -120,9 +120,10 @@ stored keyword without sibling fields:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -165,9 +166,10 @@ force_synthetic_source_ok:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: stored
           mappings:
-            _source:
-              mode: stored
             properties:
               obj:
                 properties:
@@ -218,9 +220,10 @@ doc values keyword with ignore_above:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -286,9 +289,10 @@ stored keyword with ignore_above:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -356,9 +360,10 @@ _source filtering:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -397,9 +402,9 @@ _doc_count:
       indices.create:
         index: test
         body:
-          mappings:
+          settings:
-            _source:
+            index:
-              mode: synthetic
+              mapping.source.mode: synthetic
 
   - do:
       index:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search/540_ignore_above_synthetic_source.yml

@@ -10,10 +10,9 @@ ignore_above mapping level setting:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 ignore_above: 10
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword
@@ -53,10 +52,9 @@ ignore_above mapping level setting on arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 ignore_above: 10
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword
@@ -97,10 +95,9 @@ ignore_above mapping overrides setting:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 ignore_above: 10
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword
@@ -143,10 +140,9 @@ ignore_above mapping overrides setting on arrays:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 ignore_above: 10
           mappings:
-            _source:
-              mode: synthetic
             properties:
               keyword:
                 type: keyword

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/tsdb/20_mapping.yml

@@ -472,9 +472,9 @@ stored source is supported:
               time_series:
                 start_time: 2021-04-28T00:00:00Z
                 end_time: 2021-04-29T00:00:00Z
+              mapping:
+                source.mode: stored
           mappings:
-            _source:
-              mode: stored
             properties:
               "@timestamp":
                 type: date
@@ -510,9 +510,9 @@ disabled source is not supported:
               time_series:
                 start_time: 2021-04-28T00:00:00Z
                 end_time: 2021-04-29T00:00:00Z
+              mapping:
+                source.mode: disabled
           mappings:
-            _source:
-              mode: disabled
             properties:
               "@timestamp":
                 type: date

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/update/100_synthetic_source.yml

@@ -7,9 +7,10 @@ keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               kwd:
                 type: keyword
@@ -65,9 +66,10 @@ stored text:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               text:
                 type: text

x-pack/plugin/logsdb/src/yamlRestTest/resources/rest-api-spec/test/20_ignored_source.yml

@@ -6,9 +6,10 @@ setup:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               object:
                 enabled: false

x-pack/plugin/mapper-constant-keyword/src/yamlRestTest/resources/rest-api-spec/test/20_synthetic_source.yml

@@ -7,9 +7,10 @@ constant_keyword:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               const_kwd:
                 type: constant_keyword

x-pack/plugin/mapper-unsigned-long/src/yamlRestTest/resources/rest-api-spec/test/80_synthetic_source.yml

@@ -7,9 +7,10 @@ synthetic source:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -52,9 +53,10 @@ synthetic source with copy_to:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -111,9 +113,10 @@ synthetic source with disabled doc_values:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword

x-pack/plugin/mapper-version/src/yamlRestTest/resources/rest-api-spec/test/40_synthetic_source.yml

@@ -7,9 +7,10 @@ setup:
       indices.create:
         index:  test1
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               ver:
                 type: version
@@ -76,9 +77,10 @@ synthetic source with copy_to:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               ver:
                 type: version

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/aggregate-metrics/100_synthetic_source.yml

@@ -7,9 +7,10 @@ aggregate_metric_double:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               metric:
                 type: aggregate_metric_double
@@ -62,9 +63,10 @@ aggregate_metric_double with ignore_malformed:
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               metric:
                 type: aggregate_metric_double

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/analytics/histogram.yml

@@ -182,9 +182,10 @@ histogram with synthetic source:
       indices.create:
         index: histo_synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               latency:
                 type: histogram
@@ -228,9 +229,10 @@ histogram with synthetic source and zero counts:
       indices.create:
         index: histo_synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               latency:
                 type: histogram
@@ -317,9 +319,10 @@ histogram with synthetic source and ignore_malformed:
       indices.create:
         index: histo_synthetic
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               latency:
                 type: histogram

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/enrich/40_synthetic_source.yml

@@ -4,9 +4,10 @@ setup:
       indices.create:
         index: source
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               baz:
                 type: keyword

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/30_types.yml

@@ -809,9 +809,10 @@ synthetic _source text stored:
       indices.create:
         index:  test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               card:
                 type: text
@@ -840,9 +841,10 @@ synthetic _source text with parent keyword:
       indices.create:
         index:  test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               card:
                 type: keyword

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/80_text.yml

@@ -481,9 +481,10 @@ setup:
       indices.create:
         index: test2
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               "emp_no":
                 type: long
@@ -526,9 +527,10 @@ setup:
       indices.create:
         index: test2
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               "emp_no":
                 type: long

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/searchable_snapshots/20_synthetic_source.yml

@@ -11,9 +11,9 @@ setup:
           settings:
             number_of_shards:   1
             number_of_replicas: 0
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               obj:
                 properties:

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/security/authz_api_keys/30_field_level_security_synthetic_source.yml

@@ -13,9 +13,10 @@ Filter single field:
       indices.create:
         index: index_fls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -75,9 +76,10 @@ Filter fields in object:
       indices.create:
         index: index_fls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -142,9 +144,10 @@ Fields under a disabled object - uses _ignored_source:
       indices.create:
         index: index_fls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -236,12 +239,11 @@ Dynamic fields beyond limit - uses _ignored_source:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 total_fields:
                   ignore_dynamic_beyond_limit: true
                   limit: 2
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -301,9 +303,10 @@ Field with ignored_malformed:
       indices.create:
         index: index_fls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/security/authz_api_keys/40_document_level_security_synthetic_source.yml

@@ -13,9 +13,10 @@ Filter on single field:
       indices.create:
         index: index_dls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -95,9 +96,10 @@ Filter on nested field:
       indices.create:
         index: index_dls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -178,9 +180,10 @@ Filter on object with stored source:
       indices.create:
         index: index_dls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -258,9 +261,10 @@ Filter on field within a disabled object:
       indices.create:
         index: index_dls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -335,9 +339,10 @@ Filter on field with ignored_malformed:
       indices.create:
         index: index_dls
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/snapshot/10_basic.yml

@@ -100,12 +100,11 @@ setup:
       indices.create:
         index: test_synthetic
         body:
-          mappings:
-            _source:
-              mode: synthetic
           settings:
             number_of_shards:   1
             number_of_replicas: 0
+            index:
+              mapping.source.mode: synthetic
 
   - do:
       snapshot.create:

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/spatial/140_synthetic_source.yml

@@ -8,9 +8,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               shape:
                 type: geo_shape
@@ -74,9 +75,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               shape:
                 type: geo_shape
@@ -157,9 +159,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               shape:
                 type: shape
@@ -223,9 +226,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               shape:
                 type: shape
@@ -306,9 +310,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               point:
                 type: geo_point
@@ -422,9 +427,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               geo_point:
                 type: geo_point
@@ -501,9 +507,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               point:
                 type: point
@@ -597,9 +604,10 @@
       indices.create:
         index: test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               point:
                 type: point

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/transform/preview_transforms_synthetic_source.yml

@@ -6,9 +6,10 @@ simple:
       indices.create:
         index: airline-data
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               time:
                 type: date

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/wildcard/30_ignore_above_synthetic_source.yml

@@ -10,10 +10,9 @@ wildcard field type ignore_above:
           settings:
             index:
               mapping:
+                source.mode: synthetic
                 ignore_above: 10
           mappings:
-            _source:
-              mode: synthetic
             properties:
               a_wildcard:
                 type: wildcard

x-pack/plugin/wildcard/src/yamlRestTest/resources/rest-api-spec/test/30_synthetic_source.yml

@@ -7,9 +7,10 @@ synthetic source:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword
@@ -48,9 +49,10 @@ synthetic source with copy_to:
       indices.create:
         index: synthetic_source_test
         body:
+          settings:
+            index:
+              mapping.source.mode: synthetic
           mappings:
-            _source:
-              mode: synthetic
             properties:
               name:
                 type: keyword