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Field stats index constraints allows to omit all field stats for indices that don't match with the constraint. An index constraint can exclude indices' field stats based on the `min_value` and `max_value` statistic. This option is only useful if the `level` option is set to `indices`. For example index constraints can be useful to find out the min and max value of a particular property of your data in a time based scenario. The following request only returns field stats for the `answer_count` property for indices holding questions created in the year 2014: curl -XPOST 'http://localhost:9200/_field_stats?level=indices' -d '{ "fields" : ["answer_count"] <1> "index_constraints" : { <2> "creation_date" : { <3> "min_value" : { <4> "gte" : "2014-01-01T00:00:00.000Z", }, "max_value" : { "lt" : "2015-01-01T00:00:00.000Z" } } } }' Closes #11187
Elasticsearch REST API JSON specification
This repository contains a collection of JSON files which describe the Elasticsearch HTTP API.
Their purpose is to formalize and standardize the API, to facilitate development of libraries and integrations.
Example for the "Create Index" API:
{
"indices.create": {
"documentation": "http://www.elastic.co/guide/en/elasticsearch/reference/master/indices-create-index.html",
"methods": ["PUT", "POST"],
"url": {
"path": "/{index}",
"paths": ["/{index}"],
"parts": {
"index": {
"type" : "string",
"required" : true,
"description" : "The name of the index"
}
},
"params": {
"timeout": {
"type" : "time",
"description" : "Explicit operation timeout"
}
}
},
"body": {
"description" : "The configuration for the index (`settings` and `mappings`)"
}
}
}
The specification contains:
- The name of the API (
indices.create), which usually corresponds to the client calls - Link to the documentation at http://elastic.co
- List of HTTP methods for the endpoint
- URL specification: path, parts, parameters
- Whether body is allowed for the endpoint or not and its description
The methods and url.paths elements list all possible HTTP methods and URLs for the endpoint;
it is the responsibility of the developer to use this information for a sensible API on the target platform.
Utilities
The repository contains some utilities in the utils directory:
- The
thor api:generate:specwill generate the basic JSON specification from Java source code - The
thor api:generate:codegenerates Ruby source code and tests from the specs, and can be extended to generate assets in another programming language
Run bundle install and then thor list in the utils folder.
The full command to generate the api spec is:
thor api:spec:generate --output=myfolder --elasticsearch=/path/to/es
License
This software is licensed under the Apache License, version 2 ("ALv2").