Calling model-functions in template

[Kai Kuehne]

Hello list!
Is it possible to call functions of the model out of the template?
Sorry, didn't find it in the docs.

Example:
{{ model.function() }}

Thanks
Kai

[James Bennett]

On 12/2/06, Kai Kuehne <kai.k...@gmail.com> wrote:
> Is it possible to call functions of the model out of the template?
> Sorry, didn't find it in the docs.

It is possible to call methods which take no arguments, by doing

{{ model.method }}

Note that this has 'method', not 'method()' -- parentheses are not
used, and it is not possible to pass arguments to the method. This is
done because the template language is not meant to be a full
programming language; if you need to call something with arguments,
you will need to do it in your view and pass the result data to the
template, or write a custom template tag which returns the data you
want.

--
"May the forces of evil become confused on the way to your house."
-- George Carlin

[Kai Kuehne]

Hi,

On 12/2/06, James Bennett <ubern...@gmail.com> wrote:
> Note that this has 'method', not 'method()' -- parentheses are not
> used, and it is not possible to pass arguments to the method. This is
> done because the template language is not meant to be a full
> programming language; if you need to call something with arguments,
> you will need to do it in your view and pass the result data to the
> template, or write a custom template tag which returns the data you
> want.

Okay, thank you James. :)
Kai

[Kai Kuehne]

I must misunderstand something really basic here. Just look:

Template:
<td>{{ movie.genres_title_list }}</td>

models.py:
def genres_title_list(self, separator=', '):
return separator.join([x.title for x in self.genres])

Prints nothing... idea anyone?
Kai

[Todd O'Bryan]

Which class is that in? Movie?

Are you sure that the movie you're using has genre, i.e., have you tried
it in the shell?

Todd

[Ivan Sagalaev]

Kai Kuehne wrote:
> models.py:
> def genres_title_list(self, separator=', '):
> return separator.join([x.title for x in self.genres])

If I reconstruct the case correctly and `genres` is a relation to child
objects with ForeignKey to a Movie then `self.genres` by default should
look like `self.genre_set.all()`. Otherwise it will raise an exception
(because there is no `self.genres`) and the template system won't show
anything there.

[Kai Kuehne]

Hi,

On 12/3/06, Ivan Sagalaev <Man...@softwaremaniacs.org> wrote:
> Kai Kuehne wrote:
> [model.py]

>
> If I reconstruct the case correctly and `genres` is a relation to child
> objects with ForeignKey to a Movie then `self.genres` by default should
> look like `self.genre_set.all()`. Otherwise it will raise an exception
> (because there is no `self.genres`) and the template system won't show
> anything there.

No no, this is ok. I have tested it in the shell.

Greetings
Kai