Queryset more funcionally

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I have a question whether the code is acceptable, or is there another possibility with a more optimal way out of this situation My one model look like that:

class ModelA(models.Model):
  user = models.OneToOneField(User, on_delete=models.CASCADE)
  manga = models.ManyToManyField(Manga, through='ModelB') 

  def manga_list(self):
    return ModelB.objects.filter(user=self.pk).all()

  def manga_list_reading(self):
    return ModelB.objects.filter(user=self.pk, type=utils.READING).all()

and second model look like that:

class ModelB(models.Model):
  user = models.ForeignKey(ModelA, on_delete=models.CASCADE, )
  manga = models.ForeignKey(Manga, on_delete=models.CASCADE)
  type = models.CharField(max_length=30, choices=utils.LIST_PROFILE_CHOICES, null=False, blank=False)

so my question is about this def list return, is it some another option for do it ?

django-models django
1 Answers

Your manga_list can be queried with:

self.modelb_set.all()  # ModelB objects

It thus does not make much sense to specify a method for this, since you can query this with my_model_a.modelb_set.all(). Furthermore naming this manga_list is a bit "misleading", since the queryset will return ModelB objects, not Manga objects. If you want to return all Manga objects linked by the ModelB, you can do this with:

my_model_a.manga.all()  # Manga objects

If you want to retrieve the Manga objects for which the type is READING, you can retrieve these with:

my_model_a.manga.filter(modelb__type=utils.READING)  # Manga objects
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