django - Phantom ForeignKey to similar model representing a DB view -


i'm trying 'phantom' foreignkey reference model view on backend. view assembles data includes data originating table(so share primary key).

here's simplified version of we've had setup(view more complex model, chosen design way).

class vspouse(models.model):     person_id = models.integerfield(primary_key=true)     ...  class person(models.model):     person_id = models.autofield(primary_key=true)     spouse = models.foreignkey(vspouse, db_column = 'person_id', to_field='person_id', null=true)     ...

now, since tables designed on backend before models, have never used syncdb. because of that, we've never noticed problem , things work expected.

however, we're starting develop django tests, , when begins build test db, see following:

$ python2 manage.py test misc --traceback creating test database alias 'default'... destroying old test database 'default'... traceback (most recent call last):   file "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 222, in run_from_argv     self.execute(*args, **options.__dict__)   file "/usr/lib/python2.7/site-packages/django/core/management/commands/test.py", line 72, in execute     super(command, self).execute(*args, **options)   file "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 255, in execute     output = self.handle(*args, **options)   file "/usr/lib/python2.7/site-packages/django/core/management/commands/test.py", line 89, in handle     failures = test_runner.run_tests(test_labels)   file "/usr/lib/python2.7/site-packages/django/test/simple.py", line 367, in run_tests     old_config = self.setup_databases()   file "/usr/lib/python2.7/site-packages/django/test/simple.py", line 315, in setup_databases     self.verbosity, autoclobber=not self.interactive)   file "/usr/lib/python2.7/site-packages/django/db/backends/creation.py", line 293, in create_test_db     load_initial_data=false)   file "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 161, in call_command     return klass.execute(*args, **defaults)   file "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 255, in execute     output = self.handle(*args, **options)   file "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 385, in handle     return self.handle_noargs(**options)   file "/usr/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 102, in handle_noargs     cursor.execute(statement)   file "/usr/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 58, in execute     six.reraise(utils.databaseerror, utils.databaseerror(*tuple(e.args)), sys.exc_info()[2])   file "/usr/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 54, in execute     return self.cursor.execute(query, args) databaseerror: column "person_id" specified more once

now, guess question is, there 'proper' ways of doing or working around problem? great if add switch real=false field definition wouldn't try , generate column when building test db. however, don't think that's possible.

actually, can. it's not called real, abstract, , applies models (but should able use inheritance address this).

your model structure might need little massaging correspond django expects, should started in right direction.

it's documented here.


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