#26505: django form dynamic attribute lookup
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Reporter: | Owner: nobody
igorbelo |
Type: Bug | Status: new
Component: Forms | Version: 1.9
Severity: Normal | Keywords: django-forms custom-templatetag
Triage Stage: | dynamic-attribute-lookup
Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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I'm facing an issue, and can't figure out how to solve it.
I have the following form in my application:
{{{
class ContentForm(ModelForm):
class Meta:
model = Content
fields = ('url_1','url_2','url_3','url_4','url_5',)
widgets = {
'url_1': forms.URLInput(attrs={'class': 'form-control',
'maxlength': 100}),
'url_2': forms.URLInput(attrs={'class': 'form-control',
'maxlength': 100}),
'url_3': forms.URLInput(attrs={'class': 'form-control',
'maxlength': 100}),
'url_4': forms.URLInput(attrs={'class': 'form-control',
'maxlength': 100}),
'url_5': forms.URLInput(attrs={'class': 'form-control',
'maxlength': 100}),
}
}}}
What I'm trying to do is to generate those url fields dynamically through
a loop. I took [http://stackoverflow.com/questions/27324602/django-use-
value-of-template-variable-as-part-of-another-variable-
name/27324674#27324674 this] approach (which implements a template tag for
dynamic attribute lookup):
{{{
{% for i in 12345|make_list %}
{% with url='url_'|add:i %}
{{ form|getattribute:url }}
{% endwith %}
{% endfor %}
}}}
However it's not working. Django doesn't render the input field and
complains that my form object doesn't have an attribute called `url_1` for
example. If I call the `url_1` attribute for the same form directly it
works. I checked it many times and the form object id is the same in all
contexts (template, view and custom template tag).
The implementation of the `getattribute` template tag is the same as
[http://stackoverflow.com/questions/844746/performing-a-getattr-style-
lookup-in-a-django-template/ here].
ps.: django version running is 1.9.2
--
Ticket URL: <https://code.djangoproject.com/ticket/26505>
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