Function with arguments in a template. Django

Question

In my template, I display a list of users a user follows. I would like the user to be able to delete one of the users he follows thanks to a button. I have a function remove_relationship that deletes a relationship.

Here is the function in my models.py:

  class UserProfile(models.Model):
  (...)

      def remove_relationship(self, person):
        Relationship.objects.filter(
            from_person=self, 
            to_person=person).delete()
        return

I would like to pass this function into my template:

   {% for user in following % }
   <form method="post">
    {% csrf_token %}
   <input type="submit" value="delete" onclick="remove_relationship"/>
   </form>
   {%endfor%}

The thing is that I can't pass argument in my template. So how can I do so that each button deletes the relationship with the right user?

I saw an other question on this topic, abut it looks like it doesn't solve my problem (http://stackoverflow.com/questions/1333189/django-template-system-calling-a-function-inside-a-model)

Thank you for your help.

Steve Mayne · Accepted Answer · 2012-11-05 15:15:54Z

5

It looks as though you are confusing client-side code (JavaScript) with server-side (Django).

To get the relevant user ID submitted you could add an additional hidden field to the form:

{% for user in following % }
<form method="post" action="{% url views.remove_relationship %}">
 {% csrf_token %}
<input type="hidden" name="user_id" value="{{ user.id }}">
<input type="submit" value="delete" />
</form>
{%endfor%}

Then create a remove_relationship view that does the deletion on the server side, based on the user id you'll now find in request.POST['user_id']

edited Nov 5, 2012 at 15:15

answered Nov 5, 2012 at 14:23

Steve Mayne

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7 Comments

Juliette Dupuis Over a year ago

Thank you. When I do as you say, the relationship is deleted as I want. But it redirects the user to the "remove_relationship" view. I would like the user to stay on the same page. Do you have an idea on how to do that?

Steve Mayne Over a year ago

Yes, just return an HttpResponseRedirect(reverse('your original view here')) from the remove_relationship view.

Daniel Roseman Over a year ago

Or, submit the form via Ajax. But then you'd need some Javascript to post it and remove the now-deleted content from the page.

Juliette Dupuis Over a year ago

Thanks, but I get this error: " Reverse for 'myfile.html' with arguments '()' and keyword arguments '{}' not found. " I had to import 'reverse' and I used from django.core.urlresolvers import reverse. Is it correct?

Steve Mayne Over a year ago

@JulietteDupuis You need to use the view name such as "views.myview" (i.e. the function name) rather than the template file.

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