[ansible-project] 'join' a list and a dict

[Mikael Sandström]

Hi,

I've got the following structures (or at least I'm hoping to be able to use 
them)

list_of_files:
       - { filename: file1, version: 1 }
       - { filename: file2, version: 1 }
       - { filename: file3, version: 1 }
       - { filename: file1, version: 2 }
       - { filename: file2, version: 2 }
       - { filename: file1, version: 3 }
       - { filename: file1, version: 4 }
       - { filename: file1, version: 5 }
       - { filename: file2, version: 5 }

dict_name:                                    
        key1:                                
             type: x        
             dictversion: 1          
        key2:                                
             type: y        
             dictversion: 2
        key3:                                
             type: z        
             dictversion: 1        

 

I'd like to use *dict_name.key.dictversion* to download all files from 
*list_of_files* where *dict_name.keyX.dictversion==**list_of_files*
*.version. *
Meaning, for each key, I'd like to get the (variable) number of files with 
the versionnumber that specific key has.


I tried with this:

  - name: Get files
    get_url: url={{ source }}/{{ item.0.filename }} dest={{ somewhere }}
    with_together:
        - dict_name
        - list_of_files
    when: "{{ dict_name[item.1].dictversion }}" == "{{ item.0.version }}

But it doesnt work. It errors out with a stacktrace:
  File "/usr/lib/python2.7/site-packages/ansible/runner/__init__.py", line 
561, in _executor
    exec_rc = self._executor_internal(host, new_stdin)
  File "/usr/lib/python2.7/site-packages/ansible/runner/__init__.py", line 
696, in _executor_internal
    complex_args=complex_args
  File "/usr/lib/python2.7/site-packages/ansible/runner/__init__.py", line 
756, in _executor_internal_inner
    if not utils.check_conditional(cond, self.basedir, inject, 
fail_on_undefined=self.error_on_undefined_vars):
  File "/usr/lib/python2.7/site-packages/ansible/utils/__init__.py", line 
254, in check_conditional
    conditional = template.template(basedir, conditional, inject, 
fail_on_undefined=fail_on_undefined)
  File "/usr/lib/python2.7/site-packages/ansible/utils/template.py", line 
115, in template
    varname = template_from_string(basedir, varname, vars, 
fail_on_undefined)
  File "/usr/lib/python2.7/site-packages/ansible/utils/template.py", line 
357, in template_from_string
    res = jinja2.utils.concat(rf)
  File "<template>", line 10, in root
  File "/usr/lib/python2.7/site-packages/jinja2/environment.py", line 372, 
in getattr
    return getattr(obj, attribute)
  File "/usr/lib/python2.7/site-packages/jinja2/runtime.py", line 463, in 
__getattr__
    return self._fail_with_undefined_error()
  File "/usr/lib/python2.7/site-packages/jinja2/runtime.py", line 457, in 
_fail_with_undefined_error
    raise self._undefined_exception(hint)
UndefinedError: dict object has no element None


Is this even possible? 

I could work around this by adding something like a 'download: true/false' 
to the list and use that in the when:, but I really like the to be able to 
control which files to get by using the dictversion variable in *dict_name*

regards
/Micke



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