#12486: Accessing dict values via a value of a variable as hash
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Reporter: uggsrock | Owner: nobody
Status: new | Milestone:
Component: Template system | Version: 1.1
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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In the current release (and previous releases also) there is no way to
access the value of a dict or other struct with the value of a variable as
the hash. For example if you want to have more than one struct you want to
iterate over and get a key-value-based table with the data of other
structs in it, you either have to do it manually inside the normal python
code or with very ugly filters.
[[BR]][[BR]]
Here is a simple example i mentioned before:
(we have dictionary1 and dictionary2 with the same size and keys)
{{{
{% for key,value in dictionary1.items %}
<li>{{key}}: {{value}}, {{dictionary2.key}}</li>
{% endfor %}
}}}
[[BR]]
This wouldn't work because it would search for dictionary2.key or
dictionary[ "key" ] (so key is the string "key", not a variable)
[[BR]]But to get example working you would need it to call dictionary[ key
] whereas the key is a variable and its value would be used as a hash.
Most solution with filters look this way:
{{{
@register.filter
def hash(h, key):
return h[key]
}}}
(took this one from [http://push.cx/2007/django-template-tag-for-
dictionary-access]
As you see, there is just this ugly (and by the way also slow) way through
filters but no real one the template engine should provide itself.
Therefore i would suggest to take something like "dict[ var ]" or "dict[
inner_dict[ var ] ]" as the shortcut for the template engine to provide
this usefull feature.
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Ticket URL: <http://code.djangoproject.com/ticket/12486>
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