Seemingly simple template driving me mad

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1

Hi - I’m doing something which seems very simple - trying to create a file from a jinja template.

Here are my vars:

export_root:
host: “81.187.209.128/27”
options: “rw,fsid=0,insecure,no_subtree_check,async”
exports:
video:
host: “81.187.209.128/27”
options: “rw,nohide,insecure,no_subtree_check,async”
shared_dir: “/mnt/video”

Here is the template which I’m using the test var fred:

{{export_root_dir}} {{export_root.host}}({{export_root.options}})
{% for fred in exports %}
{{ fred }}
{{ fred.options }}
{% endfor %}

For some reason, fred.options fails with:

fatal: [althea.home.stanandliz.net] => {‘msg’: “One or more undefined variables: ‘str object’ has no attribute ‘options’”, ‘failed’: True}
fatal: [althea.home.stanandliz.net] => {‘msg’: “One or more undefined variables: ‘str object’ has no attribute ‘options’”, ‘failed’: True}

I have no idea why this should be the case. When I access fred, the template prints fine. It’s when I try to access the dictionary in fred that I fail.

I’m sure there is a very simple fix to this, but after about an hour, I just can’t get this to work. Can I have a few debugging clues?

many thanks in advance

Stephen

2

In this case "fred" is the key to the exports dictionary. It can't be
both the key and the entry itself. Try something like:

  {{ fred }}
  {{ exports[fred].options }}

3

Hi Stephen -

There may be some clever Jinja magic going on here, but if this were just Python…

  • exports, as you’ve defined it, is a dictionary
  • ‘for fred in exports’ would give you each of the keys in turn, of which the first is ‘video’ - a string
  • so you’d need something like exports[fred][‘options’]

Any good?
Q

4

Thank you for the response - I see - I’ll test later - I am sure you are correct.

thanks again

5

Thank you for the response - I see - I’ll test later - I am sure you are correct.

thanks again

6

Yes, that worked - I am kicking myself a bit - thanks again. It’s a bit of a counter-intuitive view to the data structure for me. One you explained the logic, it became clear. Thanks for the explanation.

7

Yes, that worked - I am kicking myself a bit - thanks again. It’s a bit of a counter-intuitive view to the data structure for me. One you explained about fred being the key it became clear. Thanks for the explanation.