On Oct 14, 10:38 am, grimmus <graham.col...@gmail.com> 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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