Multi Get APIedit

Multi GET API allows to get multiple documents based on an index, type (optional) and id (and possibly routing). The response includes a docs array with all the fetched documents in order corresponding to the original multi-get request (if there was a failure for a specific get, an object containing this error is included in place in the response instead). The structure of a successful get is similar in structure to a document provided by the get API.

Here is an example:

GET /_mget
{
    "docs" : [
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "1"
        },
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "2"
        }
    ]
}

The mget endpoint can also be used against an index (in which case it is not required in the body):

GET /test/_mget
{
    "docs" : [
        {
            "_type" : "_doc",
            "_id" : "1"
        },
        {
            "_type" : "_doc",
            "_id" : "2"
        }
    ]
}

And type:

GET /test/_doc/_mget
{
    "docs" : [
        {
            "_id" : "1"
        },
        {
            "_id" : "2"
        }
    ]
}

In which case, the ids element can directly be used to simplify the request:

GET /test/_doc/_mget
{
    "ids" : ["1", "2"]
}

Source filteringedit

By default, the _source field will be returned for every document (if stored). Similar to the get API, you can retrieve only parts of the _source (or not at all) by using the _source parameter. You can also use the url parameters _source,_source_includes & _source_excludes to specify defaults, which will be used when there are no per-document instructions.

For example:

GET /_mget
{
    "docs" : [
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "1",
            "_source" : false
        },
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "2",
            "_source" : ["field3", "field4"]
        },
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "3",
            "_source" : {
                "include": ["user"],
                "exclude": ["user.location"]
            }
        }
    ]
}

Fieldsedit

Specific stored fields can be specified to be retrieved per document to get, similar to the stored_fields parameter of the Get API. For example:

GET /_mget
{
    "docs" : [
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "1",
            "stored_fields" : ["field1", "field2"]
        },
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "2",
            "stored_fields" : ["field3", "field4"]
        }
    ]
}

Alternatively, you can specify the stored_fields parameter in the query string as a default to be applied to all documents.

GET /test/_doc/_mget?stored_fields=field1,field2
{
    "docs" : [
        {
            "_id" : "1" 
        },
        {
            "_id" : "2",
            "stored_fields" : ["field3", "field4"] 
        }
    ]
}

Returns field1 and field2

Returns field3 and field4

Routingedit

You can also specify routing value as a parameter:

GET /_mget?routing=key1
{
    "docs" : [
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "1",
            "routing" : "key2"
        },
        {
            "_index" : "test",
            "_type" : "_doc",
            "_id" : "2"
        }
    ]
}

In this example, document test/_doc/2 will be fetch from shard corresponding to routing key key1 but document test/_doc/1 will be fetch from shard corresponding to routing key key2.

Securityedit

See URL-based access control