CODEWITHSUNDEEP
djangodjango-templates
everspader
everspader

Reputation: 1710

How to test if it is a list or a value in a Django template?

In a template in Django I am importing a list of dicts and in one of the keys (tested) I can have either a single value or a list of values depending on the case. My context dict in the template looks something like this:

context_dicts.append({'url': p.url,
                      'type_': p.type,
                      'error': error,
                      'tested': p.tested})

In the html template I want to if test the tested key to do something if it is a single value and something else if it's a list. So when looping through the dicts, if I use {% if value|length > 1% } it will give me the string size of the value when it's just a value and the length of the list when it's a list. How can I test the if to tell me if it's a "list of one value" or more?

Upvotes: 0

Views: 1234

Answers (1)

mimo
mimo

Reputation: 2629

Welcome to SO!

Storing possibly different kind of data in a single variables looks cumbersome to me. It makes your logic less easy to understand and may be prone to errors.

I think the best is to always store a list, but possibly a list with a single element. In the template, you could then do:

{% if tested.count == 1 %}
    do stuff with {{ tested.0 }} value
{% else %}
    do stuff with {{ tested }} list
{% endif %}

Upvotes: 1

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