Ansible filter a list by its attributes

Question

I have variable named  network  registered in Ansible          addresses              private ext                                    type    fixed                    addr    172 16 2 100                                    private man                                    type    fixed                    addr    172 16 1 100                                                type    floating                    addr    10 90 80 10                                    Is it possible to get the IP address   addr   with type  floating  doing something like this   - debug  var    network addresses private man   filter type  fixed    get  addr       I know the syntax is wrong but you get the idea

User · Answer

Not necessarily better  but since it s nice to have options here s how to do it using Jinja statements   - debug      msg      for address in network addresses private man                if address type     fixed                   address addr                endif              endfor       Or if you prefer to put it all on one line   - debug      msg      for address in network addresses private man if address type     fixed       address addr      endfor       Which returns   ok   localhost    gt         msg    172 16 1 100

User · Answer

To filter a list of dicts you can use the selectattr filter together with the equalto test   network addresses private man   selectattr  type    equalto    fixed     The above requires Jinja2 v2 8 or later  regardless of Ansible version      Ansible also has the tests match and search  which take regular expressions      match will require a complete match in the string  while search will require a match inside of the string    network addresses private man   selectattr  type    match     fixed        To reduce the list of dicts to a list of strings  so you only get a list of the addr fields  you can use the map filter         map attribute  addr     list   Or if you want a comma separated string         map attribute  addr     join        Combined  it would look like this   - debug  msg    network addresses private man   selectattr  type    equalto    fixed     map attribute  addr     join

User · Answer

I ve submitted a pull request  available in Ansible 2 2   that will make this kinds of situations easier by adding jmespath query support on Ansible  In your case it would work like   - debug  msg     addresses   json query   private man  type   fixed   addr          would return   ok   localhost    gt         msg              172 16 1 100

[jinja2] Ansible: filter a list by its attributes

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