55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
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[[painless-update-context]]
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=== Update context
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Use a Painless script in an {es_version}/docs-update.html[update] operation to
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add, modify, or delete fields within a single document.
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*Variables*
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`params` (`Map`, read-only)::
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User-defined parameters passed in as part of the query.
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`ctx['_op']` (`String`)::
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The name of the operation.
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{es_version}/mapping-routing-field.html[`ctx['_routing']`] (`String`, read-only)::
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The value used to select a shard for document storage.
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{es_version}/mapping-index-field.html[`ctx['_index']`] (`String`, read-only)::
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The name of the index.
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{es_version}/mapping-type-field.html[`ctx['_type']`] (`String`, read-only)::
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The type of document within an index.
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{es_version}/mapping-id-field.html[`ctx['_id']`] (`int`, read-only)::
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The unique document id.
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`ctx['_version']` (`int`, read-only)::
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The current version of the document.
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`ctx['_now']` (`long`, read-only)::
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The current timestamp in milliseconds.
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{es_version}/mapping-source-field.html[`ctx['_source']`] (`Map`)::
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Contains extracted JSON in a `Map` and `List` structure for the fields
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existing in a stored document.
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*Side Effects*
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`ctx['_op']`::
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Use the default of `index` to update a document. Set to `none` to
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specify no operation or `delete` to delete the current document from
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the index.
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{es_version}/mapping-source-field.html[`ctx['_source']`]::
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Modify the values in the `Map/List` structure to add, modify, or delete
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the fields of a document.
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*Return*
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`void`::
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No expected return value.
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*API*
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The standard <<painless-api-reference, Painless API>> is available.
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