how to create object with foreign key in model using graphine django?

[bhanuchander008]

class Actor(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name

    class Meta:
        ordering = ('name',)

class Movie(models.Model):
    title = models.CharField(max_length=100)
    actors =models.ForeignKey(Actor, on_delete=models.CASCADE)
    year = models.IntegerField()

    def __str__(self):
        return self.title

    class Meta:
        ordering = ('title',)

getting error as actor_id cannot be null

[bhanuchander008]

plz help me

[ghost]

I create objects with foreign keys by replacing the object passed on the query with the instance of the foreign-key, for example:

def extract_fk(kwargs, key, model):
    try:
        obj_id = kwargs.pop(key).get("id")
    except KeyError:
        obj_id = None
    if obj_id:
        try:
            kwargs[key] = model.objects.get(id=obj_id)
        except model.DoesNotExist:
            pass
    return kwargs

And then on the mutate function, passing in kwargs, you can do:

kwargs = extract_fk(kwargs, "<foreign_key_field_name>", Actor)
actor = Actor.objects.create(**kwargs)

With the graphql query looking like:

mutation {
  createActor(foreignKeyFieldName: {id: "<foreign-key-id>"}) {
    actor {
      id
      name
    }
  }
}