89 lines
2.1 KiB
Plaintext
89 lines
2.1 KiB
Plaintext
[[coerce]]
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=== `coerce`
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Data is not always clean. Depending on how it is produced a number might be
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rendered in the JSON body as a true JSON number, e.g. `5`, but it might also
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be rendered as a string, e.g. `"5"`. Alternatively, a number that should be
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an integer might instead be rendered as a floating point, e.g. `5.0`, or even
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`"5.0"`.
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Coercion attempts to clean up dirty values to fit the data type of a field.
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For instance:
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* Strings will be coerced to numbers.
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* Floating points will be truncated for integer values.
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For instance:
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[source,console]
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--------------------------------------------------
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PUT my-index-000001
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{
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"mappings": {
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"properties": {
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"number_one": {
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"type": "integer"
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},
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"number_two": {
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"type": "integer",
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"coerce": false
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}
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}
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}
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}
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PUT my-index-000001/_doc/1
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{
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"number_one": "10" <1>
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}
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PUT my-index-000001/_doc/2
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{
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"number_two": "10" <2>
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}
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--------------------------------------------------
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// TEST[catch:bad_request]
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<1> The `number_one` field will contain the integer `10`.
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<2> This document will be rejected because coercion is disabled.
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TIP: The `coerce` setting value can be updated on existing fields
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using the <<indices-put-mapping,PUT mapping API>>.
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[[coerce-setting]]
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==== Index-level default
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The `index.mapping.coerce` setting can be set on the index level to disable
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coercion globally across all mapping types:
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[source,console]
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--------------------------------------------------
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PUT my-index-000001
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{
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"settings": {
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"index.mapping.coerce": false
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},
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"mappings": {
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"properties": {
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"number_one": {
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"type": "integer",
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"coerce": true
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},
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"number_two": {
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"type": "integer"
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}
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}
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}
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}
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PUT my-index-000001/_doc/1
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{ "number_one": "10" } <1>
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PUT my-index-000001/_doc/2
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{ "number_two": "10" } <2>
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--------------------------------------------------
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// TEST[catch:bad_request]
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<1> The `number_one` field overrides the index level setting to enable coercion.
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<2> This document will be rejected because the `number_two` field inherits the index-level coercion setting.
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