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Python Django Class-based Views Customizing Class-based Views Mixins

Chris Komaroff
PLUS
Chris Komaroff
Courses Plus Student 14,198 Points
Posted by Chris Komaroff
Chris Komaroff
Courses Plus Student 14,198 Points

Mixins video, Challenge Task 2 of 4 (and 4 of 4), trying to return an attribute from the instance

Question:

Challenge Task 2 of 4

Now add a get_success_message method to your mixin that returns the success_message attribute from the instance.

articles/mixins.py

from django.contrib import messages

class SuccessMessageMixin:
    # Added this attribute in task '1 of 4'
    success_message = ''

    # Code I added for task '2 of 4'
    def get_success_message(self):
        return self.success_message

Am I misreading the question? He says "from the instance". Is that a clue? I thought he refers to an instance of SuccessMessageMixin, but maybe he refers to a model instance. Maybe I am just making a silly mistake (sorry), or else he is sending me off to study more about mixins. Thanks for any info!

jacinator
jacinator
11,936 Points

If you link to the actual challenge instead of the video it might help.

3 Answers

Chris Komaroff
PLUS
Chris Komaroff
Courses Plus Student 14,198 Points
Chris Komaroff
Chris Komaroff
Courses Plus Student 14,198 Points

Note on task 4 of 4

The original form_valid() method I wrote for SucessMessageMixin passed task 3 of 4, but caused 4 of 4 to fail. I fixed as as shows below.

articls/mixins.py

class SuccessMessageMixin:
    success_message = ''

    def get_success_message(self):
        return self.success_message

    # This mixin method caused problem in 4 of 4
    def form_valid(self, form):
        messages.success(self.request, self.get_success_message())
        #return super(ModelFormMixin, self).form_valid(form)  # No (passed 3 of 4, fails 4 of 4)
        return super().form_valid(form)  # Yes  (passes 3 of 4, passes 4 of 4)

I guess 'return super().form_valid(form)' is correct logic. It follows the djangoal PageTitleMixin example video.

Sorry folks if I prattle too much, but I hope these observations I made can be helpful to future students!

Chris Komaroff
PLUS
Chris Komaroff
Courses Plus Student 14,198 Points
Chris Komaroff
Chris Komaroff
Courses Plus Student 14,198 Points

Hi jacinator, makes sense, I just opened a new identical question directly under the challenge question. I am going to delete this original question. Thank you for your time.

Chris Komaroff
PLUS
Chris Komaroff
Courses Plus Student 14,198 Points
Chris Komaroff
Chris Komaroff
Courses Plus Student 14,198 Points

P.S. I think some people like to post questions about code challenges to the video because the code challenge does not show the question that you post against it.