Thanks for your reply. Here's what i did so far
i created a file called has_saved_link.py in my app's templatetags
folder:
from django.template import Library, Node
from django.db.models import get_model
register = Library()
def has_saved_link(user, object):
return user.savedlink_set.objects.filter(link=object).count()
has_saved_link = register.tag(has_saved_link)
Then, in my template i load the tag
{% load has_saved_link %}
But if i try and use your syntax below i get errors
{% if user.is_authenticated and not user|has_saved_link:object %} -
Error - Invalid filter: 'has_saved_link'
{% if user.is_authenticated and not user.has_saved_link:object %} -
Error - Could not parse the remainder: ':object' from
'user.has_saved_link:object'
I think it's an issue with how the objects are being passed to the
tag ?
I'm a bit of a Noob with all this (as you can probably tell !!)
Thanks
On Oct 14, 12:16 pm, Daniel Roseman <[email protected]> wrote:
> On Oct 14, 10:38 am, grimmus <[email protected]> wrote:
>
>
>
> > Hi,
>
> > I have 2 Models, Link and SaveLink.
>
> > Link allows URL's with title's and descripions to be added to the
> > site.
> > SaveLink allows the logged in user to save their favourite links.
>
> > When i output all the links on the page i would like to check if the
> > active user has already saved the current link.
>
> > Something like
>
> > {% if user.is_authenticated and not user.has_saved_link %}
> > <p class="saveContainer" ><a id="{{object.id}}"
> > href="{{object.get_save_url}}" class="save">Save</a>
> > {% else if user.is_authenticated and user.has_saved_link %}
> > <p>Already Saved</a>
> > {% else %}
> > <p><a href="/accounts/login/">Login to save</a>
> > {% endif %}
>
> > I have not made the user.has_saved_link function yet and am unsure how
> > to tackle this. Maybe i could pass the current context back to a
> > function and compare it against what the user has already saved ?
>
> > Thanks in advance
>
> Assuming that 'object' is the link to save, and that there is a
> foreign key from SavedLink to Link, your lookup needs to be something
> like:
> user.savedlink_set.objects.filter(link=object)
>
> So the question is how can we do that lookup in a template. I'd do it
> as a filter, since these are easy to write and can be used in an {% if
> %} tag.
>
> @register.filter
> def has_saved_link(user, object)
> return user.savedlink_set.objects.filter(link=object).count()
>
> Then you can do:
> {% if user.is_authenticated and not user|has_saved_link:object %}
>
> --
> DR.
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