[[query-dsl-not-filter]]
=== Not Filter

A filter that filters out matched documents using a query. Can be placed
within queries that accept a filter.

[source,js]
--------------------------------------------------
{
    "filtered" : {
        "query" : {
            "term" : { "name.first" : "shay" }
        },
        "filter" : {
            "not" : {
                "range" : {
                    "postDate" : {
                        "from" : "2010-03-01",
                        "to" : "2010-04-01"
                    }
                }
            }
        }
    }
}
--------------------------------------------------

Or, in a longer form with a `filter` element:

[source,js]
--------------------------------------------------
{
    "filtered" : {
        "query" : {
            "term" : { "name.first" : "shay" }
        },
        "filter" : {
            "not" : {
                "filter" :  {
                    "range" : {
                        "postDate" : {
                            "from" : "2010-03-01",
                            "to" : "2010-04-01"
                        }
                    }
                }
            }
        }
    }
}
--------------------------------------------------

[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). Here is
an example:

[source,js]
--------------------------------------------------
{
    "filtered" : {
        "query" : {
            "term" : { "name.first" : "shay" }
        },
        "filter" : {
            "not" : {
                "filter" :  {
                    "range" : {
                        "postDate" : {
                            "from" : "2010-03-01",
                            "to" : "2010-04-01"
                        }
                    }
                },
                "_cache" : true
            }
        }
    }
}
--------------------------------------------------