Poor error message (or functionality) when using unsaved models as foreign keys

[Dave Abrahams <dave@…>]

This reduced case untested, sorry.

from django.db import models

class X(models.Model):
    pass

class Y(models.Model):
    x = models.ForeignKey(X)

x = X()
Y(x=x).save()

The result,
IntegrityError: ERROR: null value in column "presenter_id" violates not-null constraint, is cryptic at best. Maybe rather than improving the error message, it should recursively save all unsaved models?

[Dave Abrahams <dave@…>]

Oops, not presenter_id, but x_id

[Chris Beaven]

I think just improving the error message would be enough. But what does core think?

[James Bennett]

Duplicate of #3016, I believe; fixing that should fix this.