How can I get cascade deletion for ManyToManyFields?

Question

I have a model with two ManyToManyFields referring to a Position model. When a Position instance is deleted, I would like to have the same behaviour in the admin as for a ForeignKey, i.e. cascade deletion + a message asking for confirmation with the list of the objects that will be deleted.

How can I do that?

class Task(models.Model):    
    start_positions = models.ManyToManyField(Position, related_name='start_pos')
    end_positions = models.ManyToManyField(Position, related_name='end_pos')
    # more stuff

EDIT

I'm aware of this question: Django - Cascade deletion in ManyToManyRelation, but it has no proper answer.

score 0 · Answer 1 · answered Mar 06 '13 at 11:35

0

class Task(models.Model):    
    start_positions = models.ManyToManyField(
        Position, 
        related_name='start_pos', 
        on_delete=models.CASCADE
        )
    end_positions = models.ManyToManyField(
        Position, 
        related_name='end_pos', 
        on_delete=models.CASCADE
        )

answered Mar 06 '13 at 11:35

catherine

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ManyToManyField has no 'on_delete' argument. – jul Mar 06 '13 at 13:06
Ok, will try to fix it – catherine Mar 06 '13 at 13:14

How can I get cascade deletion for ManyToManyFields?

1 Answers1