152 lines
4.2 KiB
Markdown
152 lines
4.2 KiB
Markdown
---
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layout: default
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title: Copy
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parent: Ingest processors
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nav_order: 35
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redirect_from:
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- /api-reference/ingest-apis/processors/copy/
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---
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# Copy processor
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The `copy` processor copies an entire object in an existing field to another field.
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## Syntax
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The following is the syntax for the `copy` processor:
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```json
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{
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"copy": {
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"source_field": "source_field",
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"target_field": "target_field",
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"ignore_missing": true,
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"override_target": true,
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"remove_source": true
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}
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}
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```
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{% include copy-curl.html %}
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## Configuration parameters
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The following table lists the required and optional parameters for the `copy` processor.
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| Parameter | Required/Optional | Description |
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|---|---|---|
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`source_field` | Required | The name of the field to be copied. Supports [template snippets]({{site.url}}{{site.baseurl}}/ingest-pipelines/create-ingest/#template-snippets). |
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`target_field` | Required | The name of the field to be copied to. Supports [template snippets]({{site.url}}{{site.baseurl}}/ingest-pipelines/create-ingest/#template-snippets). |
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`ignore_missing` | Optional | Specifies whether the processor should ignore documents that do not contain the specified `source_field`. If set to `true`, the processor does not modify the document if the `source_field` does not exist or is `null`. Default is `false`. |
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`override_target` | Optional | Specifies whether the processor should override the `target_field` if it already exists in the document. If set to `true`, the processor overrides the value of `target_field` if it already exists. Default is `false`. |
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`remove_source` | Optional | Specifies whether the processor should remove the `source_field` after it has been copied. If set to `true`, the processor removes the `source_field` from the document. Default is `false`. |
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`description` | Optional | A brief description of the processor. |
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`if` | Optional | A condition for running the processor. |
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`ignore_failure` | Optional | Specifies whether the processor continues execution even if it encounters an error. If set to `true`, the failure is ignored. Default is `false`. |
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`on_failure` | Optional | A list of processors to run if the processor fails. |
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`tag` | Optional | An identifier tag for the processor. Useful for debugging in order to distinguish between processors of the same type. |
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## Using the processor
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Follow these steps to use the processor in a pipeline.
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**Step 1: Create a pipeline**
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The following query creates a pipeline named `copy_object` that copies a nested object from one field to the root level:
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```json
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PUT /_ingest/pipeline/copy_object
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{
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"description": "Pipeline that copies object.",
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"processors": [
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{
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"copy": {
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"source_field": "message.content",
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"target_field":"content",
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"ignore_missing": true,
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"override_target": true,
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"remove_source": true
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}
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}
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]
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}
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```
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{% include copy-curl.html %}
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**Step 2 (Optional): Test the pipeline**
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It is recommended that you test your pipeline before you ingest documents.
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{: .tip}
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To test the pipeline, run the following query:
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```json
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POST _ingest/pipeline/copy_object/_simulate
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{
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"docs": [
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{
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"_index": "testindex1",
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"_id": "1",
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"_source":{
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"message": {
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"content": {
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"foo": "bar",
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"zoo": [1, 2, 3]
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}
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}
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}
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}
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]
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}
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```
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{% include copy-curl.html %}
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**Response**
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The following example response confirms that the pipeline is working as expected:
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```json
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{
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"docs": [
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{
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"doc": {
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"_index": "testindex1",
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"_id": "1",
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"_source": {
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"content": {
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"foo": "bar",
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"zoo": [1, 2, 3]
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}
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},
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"_ingest": {
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"timestamp": "2023-08-24T18:02:13.218986756Z"
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}
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}
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}
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]
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}
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```
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**Step 3: Ingest a document**
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The following query ingests a document into an index named `testindex1`:
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```json
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PUT testindex1/_doc/1?pipeline=copy_object
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{
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"content": {
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"foo": "bar",
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"zoo": [1, 2, 3]
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}
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}
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```
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{% include copy-curl.html %}
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**Step 4 (Optional): Retrieve the document**
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To retrieve the document, run the following query:
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```json
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GET testindex1/_doc/1
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```
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{% include copy-curl.html %}
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