On Sunday, January 30, 2011 6:01:00 PM UTC, a.esmail wrote:
>
> Hello,
> I tried my best with no luck.
> Here are the relevant code snippets:
>
> <snip>
>
> #################################################
> Item form:
> class ItemForm(forms.ModelForm):
> def __init__(self, fields_list, *args, **kwargs):
> super(ItemForm, self).__init__(*args, **kwargs)
> for field in self.fields:
> if field not in fields_list:
> field_name = str(field)
> del self.fields[field_name]
>
> class Meta():
> model = Item
>
> #################################################
>
> I know this is not the best way to do this, but I just want to
> understand why this happens.
> For some reason, the for loop in ItemForm doesn't loop through all the
> fields.
> It only goes through 8, sometimes 9 fields out of the 14 in
> self.fields. (e.g., I can't see the activation_code field in the
> loop).
> I printed self.fields and it showed all the fields in the Item model,
> so why don't some of them show up in the loop?
> I want to filter the fields based on the category chosen. The
> fields_list parameter is a list of strings representing the fields I
> want to include in the final form.
>
> Any help would be appreciated. I've spent more hours than I can count
> on this.
> Thank you.
You're modifying a list while iterating through it. Don't do that. Make a
copy of the list and use that instead. Or, even better:
self.fields = [f for f in self.fields if str(f) in fields_list]
--
DR.
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