Compute date field filter
---

Status : core plugin, unit tested and maintained.

The compute date field filter is used to compute a date field from ``timestamp``field, using using [moment](http://momentjs.com/docs/#/parsing/string-format/) date format.

Example 1: add a field named ``toto``, containing timestamp formated with ``DD/MMMM/YYYY``
Config using url: ``filter://compute_date_field://toto?date_format=DD/MMMM/YYYY``

Config using logstash format:

````
filter {
  compute_date_field {
    field => toto
    date_format => 'DD/MMMM/YYYY'
  }
}
````

Parameters:

* ``field``: which field to work on.
* ``date_format``: date format string, using [moment](http://momentjs.com/docs/#/parsing/string-format/).