Django Design Patterns and Best Practices - Second Edition

Solution details

Most generic class-based views are derived from ContextMixin. It provides the get_context_data method, which most classes override, to add their own context variables. While overriding this method, as a best practice, you will need to call get_context_data of the superclass first and then add or override your context variables.

We can abstract this in the form of a mixin, as we saw previously:

class FeedMixin(object): 
 
    def get_context_data(self, **kwargs): 
        context = super().get_context_data(**kwargs) 
        context["feed"] = models.Post.objects.viewable_posts(            self.request.user) 
        return context 

We can add this mixin to our views and use the added context variables in our templates. Notice that we are using the model manager defined ...