[Django]-Show models.ManyToManyField as inline, with the same form as models.ForeignKey inline

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I see your point but think of a case where you might need to use custom through model (table). In that case the admin inline form would include the fields for that intermediate model since thats the model you asked the admin to create the form for.

e.g.

class Person(models.Model):
    name = models.CharField(max_length=128)

class Group(models.Model):
    name = models.CharField(max_length=128)
    members = models.ManyToManyField(Person, through='Membership')

class Membership(models.Model):
    person = models.ForeignKey(Person)
    group = models.ForeignKey(Group)
    date_joined = models.DateField()
    invite_reason = models.CharField(max_length=64)

The admin should display the form for the Memebership model cause thats the model the editable instance is related to.
In your case the through model contains only the 2 foreign keys (1 for the Action model and 1 for the Sample) ands thats why only the list of actions appear.

You could do what you are asking for if django admin supported nested inlines (there is an open ticket about that).

👤vinilios

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