On Mar 20, 11:15 pm, Daniel Roseman <dan...@roseman.org.uk> wrote:
> On Sunday, March 20, 2011 9:57:04 PM UTC, Turner wrote:
>
> > I'm working on a custom tag to which I would like to be able to pass
> > template variables and filters. I found
> > <code>Variable(value).resolve(context)</code> in the Django source. I
> > have a couple of questions:
>
> > You don't need to look at the code, this is explicitly documented:
>
> http://docs.djangoproject.com/en/1.2/howto/custom-template-tags/#pass...
Ah, I somehow missed that in my searching.
>
> > 1) Is it safe to use <code>Variable()</code>? That is, is it part of
> > the public API? Not having visibility modifiers makes it a bit
> > difficult to tell.
>
> Yes, since it is documented.
>
> > 2) Variable.resolve() works fine for, well, resolving a variable, but
> > doesn't work with filters. That is, if I pass to my tag
> > <code>some.context.variable|some_filter</code>, the tag will throw up
> > on the last bit, saying that it can't find an attribute/key/method
> > called "variable|some_filter". Is there an easy way I can have my tag
> > apply any filters to the value passed in?
>
> AFAIK that should just work. The `with` tag, for example, works fine with
> arguments that include filters.
Here's the exception I get when I try a variable with filters:
Caught VariableDoesNotExist while rendering: Failed lookup for key
[path|split_path]
It's raised on the following template call:
{% my_tag list=form.instance.path|split_path %}
(split_path is, obviously, a custom filter)
In the code for my tag I have the following
Variable(value).resolve(context)
(where value is "form.instance.path|split_path")
I'm using Django version 1.3 alpha 1, if that makes a difference.
> --
> DR.
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