Templating in Ansible is handled by Jinja2.  You can find documentation on
Jinja2 at http://jinja.pocoo.org/docs/dev/templates/

For the `first` filter specifically:
http://jinja.pocoo.org/docs/dev/templates/#first

On Wed, Apr 11, 2018 at 11:47 AM, Bishwajit Samanta <
bishwajitsamanta1...@gmail.com> wrote:

> @Matt Martz : I am sorry to ask silly questions, regarding ansible as by
> seeing the small piece of code, i can understand you must be an ansible
> expert. If possible you can help me in my problem explanation a bit.
>
> And any such links for learning you want to refer, please refer me. As i
> googled selectattr but first|first parameter which you have passed i am not
> getting any good document. If you can help me in referring such, it would
> be of very nice help.
>
>
>
> On Wednesday, April 11, 2018 at 9:36:13 PM UTC+5:30, Bishwajit Samanta
> wrote:
>>
>> I am glad you replied so fast, but sorry to say i am not an ansible
>> expert . I am just a beginner . I just typed the code. Can you help me in
>> understanding  where i am not correct.
>>
>> ---
>>
>> - hosts: devops
>>
>>   tasks:
>>     - debug:
>>        msg: "{{ hostinfo|dictsort|selectattr('1.hostclass', 'equalto',
>> 'ess')|first|first }}"
>>
>> ~
>> ~
>>
>>
>>
>>
>> On Wednesday, April 11, 2018 at 8:54:15 PM UTC+5:30, Bishwajit Samanta
>> wrote:
>>>
>>> i am having a problem in finding solution. I have a piece of file which
>>> contains data in below format (json type with quotes)::-
>>>
>>> hostinfo:
>>>   'host001':
>>>     ip: x.x.x.x
>>>     hostclass: 'puppet'
>>>   'host002':
>>>     ip: y.y.y.y
>>>     hostclass: 'ess'
>>>   'host003':
>>>     ip: z.z.z.z
>>>     hostclass: 'mdb'
>>>
>>> Now my task is to find out the hostname of the system belong to
>>> hostclass 'ess' , which in this case the answer in host002. I have to write
>>> an ansible script to find out the result. Can anyone help me in finding
>>> out, or any idea to approach for the problem.
>>>
>>> Issue Type:: Finding a phrase through ansible
>>> Ansible Version:: Ansible 2.4.0
>>> Component Name:: It looks similar to json type file.
>>>
>>>
>>>
>>> --
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-- 
Matt Martz
@sivel
sivel.net

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