inherited model m2m gets invalid foreign key

[iacobs+south@…]

example:

class Person(models.Model):
    name = models.CharField(max_length=10)


class Student(Person):
    classes = models.ManyToManyField(Class)

will yield something like

db.create_table('people_student', (
    ('person_ptr', orm['people.Student:person_ptr']),
))

db.create_table('people_student_classes', (
    ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
    ('student', models.ForeignKey(orm.Student, null=False)),
    ('class', models.ForeignKey(orm.Class, null=False)),
))

where the student foreign key erroneously points to Student.id instead of Student.person_ptr

[andrew]

Hrm, sounds nasty, but I was sure I'd fixed this. Will investigate later.

[andrew]

It works for me:

$ ./manage.py migrate southdemo --verbosity=2
Running migrations for southdemo:                                           
 - Migrating forwards to 0006_test.                                         
 > southdemo: 0006_test                                                     
   = CREATE TABLE "southdemo_person" ("id" serial NOT NULL PRIMARY KEY, "name" varchar(10) NOT NULL); []
   = CREATE TABLE "southdemo_student" ("person_ptr_id" integer NOT NULL PRIMARY KEY); []                
   = CREATE TABLE "southdemo_student_classes" ("id" serial NOT NULL PRIMARY KEY, "student_id" integer NOT NULL, "lizard_id" integer NOT NULL); []
   = ALTER TABLE "southdemo_lizard" ADD CONSTRAINT "southdemo_lizard_length" UNIQUE ("length") []                                                
   = ALTER TABLE "southdemo_student" ADD CONSTRAINT "person_ptr_id_refs_id_60924bac312951aa" FOREIGN KEY ("person_ptr_id") REFERENCES "southdemo_person" ("id") DEFERRABLE INITIALLY DEFERRED; []                                                                                                                                 
   = ALTER TABLE "southdemo_student_classes" ADD CONSTRAINT "student_id_refs_person_ptr_id_3fc13d2cae98a93c" FOREIGN KEY ("student_id") REFERENCES "southdemo_student" ("person_ptr_id") DEFERRABLE INITIALLY DEFERRED; []                                                                                                        
   = CREATE INDEX "southdemo_student_classes_student_id" ON "southdemo_student_classes" ("student_id"); []                                                       
   = ALTER TABLE "southdemo_student_classes" ADD CONSTRAINT "lizard_id_refs_id_679dddb4f7a967a6" FOREIGN KEY ("lizard_id") REFERENCES "southdemo_lizard" ("id") DEFERRABLE INITIALLY DEFERRED; []                                                                                                                                 
   = CREATE INDEX "southdemo_student_classes_lizard_id" ON "southdemo_student_classes" ("lizard_id"); []

Are you on the very latest code? If you are and it still fails, I'd appreciate your output from "./manage.py migrate appname migrationname --verbosity=2".

[andrew]

No response; closing as invalid for now. If you do still have the error on the latest code, please reopen with the output with verbosity=2 as described above.