[[query-dsl-and-filter]]
=== And Filter

A filter that matches documents using the `AND` boolean operator on other
filters. Can be placed within queries that accept a filter.

[source,js]
--------------------------------------------------
{
    "filtered" : {
        "query" : {
            "term" : { "name.first" : "shay" }
        },
        "filter" : {
            "and" : [
                {
                    "range" : { 
                        "postDate" : { 
                            "from" : "2010-03-01",
                            "to" : "2010-04-01"
                        }
                    }
                },
                {
                    "prefix" : { "name.second" : "ba" }
                }
            ]
        }
    }
}
--------------------------------------------------

[float]
==== Caching

The result of the filter is not cached by default. The `_cache` can be
set to `true` in order to cache it (though usually not needed). Since
the `_cache` element requires to be set on the `and` filter itself, the
structure then changes a bit to have the filters provided within a
`filters` element:

[source,js]
--------------------------------------------------
{
    "filtered" : {
        "query" : {
            "term" : { "name.first" : "shay" }
        },
        "filter" : {
            "and" : { 
                "filters": [
                    {
                        "range" : { 
                            "postDate" : { 
                                "from" : "2010-03-01",
                                "to" : "2010-04-01"
                            }
                        }
                    },
                    {
                        "prefix" : { "name.second" : "ba" }
                    }
                ],
                "_cache" : true
            }
        }
    }
}
--------------------------------------------------
