Question

I have the following two models:

class Position(models.Model):
    position = models.CharField(max_length=100)

class UserProfile(models.Model):
    user = models.ForeignKey(User, unique=True)
    positions = models.ManyToManyField(Position, blank=True, null=True)

This creates a database table called userprofile_userprofile_positions, with the following three columns:

id
userprofile_id
position_id

How would I add a fourth field to this table —

created_at = models.DateTimeField(auto_now_add=True)

I would like to do this through django, if possible. Thank you.

Answer 1

Create a new model and specify it in the through attribute of your ManyToMany. The Django docs have a section on this exact use case: Extra fields on many-to-many relationships.