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# Conflicts:
# docs/reference/aggregations/search-aggregations-pipeline-bucket-script-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-cumulative-cardinality-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-cumulative-sum-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-derivative-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-extended-stats-bucket-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-max-bucket-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-min-bucket-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-percentiles-bucket-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-stats-bucket-aggregation.md
# docs/reference/aggregations/search-aggregations-pipeline-sum-bucket-aggregation.md
# docs/reference/query-languages/esql/esql-commands.md
# docs/reference/query-languages/esql/esql-lookup-join.md
# docs/reference/query-languages/esql/esql-process-data-with-dissect-grok.md
# docs/reference/query-languages/images/esql-lookup-join.png
# docs/reference/query-languages/toc.yml
# docs/reference/search-connectors/es-connectors-run-from-docker.md
# docs/reference/text-analysis/analysis-apostrophe-tokenfilter.md
# docs/reference/toc.yml
* remove markers
---------
Co-authored-by: Colleen McGinnis <colleen.mcginnis@elastic.co>
89 lines
3.4 KiB
Markdown
89 lines
3.4 KiB
Markdown
---
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navigation_title: "JSON"
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mapped_pages:
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- https://www.elastic.co/guide/en/elasticsearch/reference/current/json-processor.html
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---
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# JSON processor [json-processor]
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Converts a JSON string into a structured JSON object.
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$$$json-options$$$
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| Name | Required | Default | Description |
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| --- | --- | --- | --- |
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| `field` | yes | - | The field to be parsed. |
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| `target_field` | no | `field` | The field that the converted structured object will be written into. Any existing content in this field will be overwritten. |
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| `add_to_root` | no | false | Flag that forces the parsed JSON to be added at the top level of the document. `target_field` must not be set when this option is chosen. |
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| `add_to_root_conflict_strategy` | no | `replace` | When set to `replace`, root fields that conflict with fields from the parsed JSON will be overridden. When set to `merge`, conflicting fields will be merged. Only applicable if `add_to_root` is set to `true`. |
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| `allow_duplicate_keys` | no | false | When set to `true`, the JSON parser will not fail if the JSON contains duplicate keys. Instead, the last encountered value for any duplicate key wins. |
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| `strict_json_parsing` | no | true | When set to `true`, the JSON parser will strictly parse the field value. When set to `false`, the JSON parser will be more lenient but also more likely to drop parts of the field value. For example if `strict_json_parsing` is set to `true` and the field value is `123 "foo"` then the processor will throw an IllegalArgumentException. But if `strict_json_parsing` is set to `false` then the field value will be parsed as `123`. |
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| `description` | no | - | Description of the processor. Useful for describing the purpose of the processor or its configuration. |
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| `if` | no | - | Conditionally execute the processor. See [Conditionally run a processor](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#conditionally-run-processor). |
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| `ignore_failure` | no | `false` | Ignore failures for the processor. See [Handling pipeline failures](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#handling-pipeline-failures). |
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| `on_failure` | no | - | Handle failures for the processor. See [Handling pipeline failures](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#handling-pipeline-failures). |
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| `tag` | no | - | Identifier for the processor. Useful for debugging and metrics. |
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All JSON-supported types will be parsed (null, boolean, number, array, object, string).
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Suppose you provide this configuration of the `json` processor:
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```js
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{
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"json" : {
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"field" : "string_source",
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"target_field" : "json_target"
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}
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}
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```
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If the following document is processed:
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```js
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{
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"string_source": "{\"foo\": 2000}"
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}
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```
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after the `json` processor operates on it, it will look like:
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```js
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{
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"string_source": "{\"foo\": 2000}",
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"json_target": {
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"foo": 2000
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}
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}
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```
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If the following configuration is provided, omitting the optional `target_field` setting:
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```js
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{
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"json" : {
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"field" : "source_and_target"
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}
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}
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```
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then after the `json` processor operates on this document:
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```js
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{
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"source_and_target": "{\"foo\": 2000}"
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}
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```
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it will look like:
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```js
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{
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"source_and_target": {
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"foo": 2000
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}
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}
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```
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This illustrates that, unless it is explicitly named in the processor configuration, the `target_field` is the same field provided in the required `field` configuration.
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