DeleteView with 2 arguements post and user

问题

I have a delete view with 2 conditions "post" and "user".

The user requirement is fulfilled by self.object.user = self.request.user and post requirement is fulfilled by slug = self.kwargs['slug'](I think this may be the culprit)

Are my views correct?

I am new to python please forgive any silly mistakes.

Views.py

class ProofDelete(LoginRequiredMixin, DeleteView):
    model = Proof

    def delete(self, *args, **kwargs):
        return super().delete(*args, **kwargs)

    def get_success_url(self, *args, **kwargs):
        slug = self.kwargs['slug']
        print(slug)
        obj = get_object_or_404(Post, slug=slug)
        url_ = obj.get_absolute_url()
        user = self.request.user
        if user.is_authenticated():
            if user in obj.made.all():
                obj.made.remove(user)
            else:
                obj.made.add(user)
        return url_

models.py

User = get_user_model() 
class Proof(models.Model):
    user = models.ForeignKey(User, related_name='proofmade')
    post = models.ForeignKey(Post, related_name='proofmade')
    made_at = models.DateTimeField(auto_now=True)
    image_of_proof= models.ImageField()
    proof_ = models.ImageField()
    suggestions = models.TextField(max_length=1000)

def __str__(self):
    return self.post.title

urls.py

    app_name = 'proof'

    urlpatterns = [

        url(r'^new_proof/(?P<slug>[-\w]+)/$', views.ProofCreate.as_view(), name='new_proof'),

        url(r'^proof_delete/(?P<pk>\d+)/$', views.ProofDelete.as_view(),name='proof_delete'),

also tried

url (r'^proof_delete/(?P<slug>[-\w]+)/(?P<pk>\d+)/$', views.ProofDelete.as_view(), name='proof_delete'),

I get the below error. Indicating error in the views

Error Message Click to see Error message

Same error message after scrolling down. Click to open

回答1:

The answer was in the templates. Adding a forloop after the "if" statement solved the issue. Doing this handles both arguments of the Url. "slug" of "post" model and "pk" of the "proof" model. Without the forloop It was almost impossible to satisfy both arguments of the URL

The correct Url thanks to "Paulo Almeida"

url (r'^proof_delete/(?P<slug>[-\w]+)/(?P<pk>\d+)/$', views.ProofDelete.as_view(), name='proof_delete') 

Below is the template

{% if user in post.made.all %}
    {% for proof in user.proofmade.all %}
        <a href="{% url 'proof:proof_delete' slug=post.slug pk=proof.pk %}">
            <img src="{% static 'images/thumbs_up_RED.png' %}" height="25px">
        </a><br/>
    {% endfor %}
{% else %}
    <a href="{% url 'proof:new_proof' slug=post.slug %}">
        <img src="{% static 'images/thumbs_up_BLANK.png' %}" height="25px">
    </a><br/>
{% endif %}

来源：https://stackoverflow.com/questions/49960589/deleteview-with-2-arguements-post-and-user