Removing M2M causes crash

[evan.reiser@…]

removing a M2M field that has the through="SomeThroughTable?" causes a crash

C:\Python24\python.exe manage.py startmigration deals moving_verticalentities --auto

• Deleted field 'deals.vertical.entities'

Traceback (most recent call last):

File "manage.py", line 11, in ?

execute_manager(settings)

File "C:\Python24\lib\site-packages\django\core\management\init.py", line

340, in execute_manager

utility.execute()

File "C:\Python24\lib\site-packages\django\core\management\init.py", line

295, in execute

self.fetch_command(subcommand).run_from_argv(self.argv)

File "C:\Python24\lib\site-packages\django\core\management\base.py", line 77,

in run_from_argv

self.execute(*args, options.dict)

File "C:\Python24\lib\site-packages\django\core\management\base.py", line 96,

in execute

output = self.handle(*args, options)

File "C:\Users\Evan Reiser\workspace\ValueWeekly?\south\management\commands\sta

rtmigration.py", line 384, in handle

forwards += DELETE_M2MFIELD_SNIPPET % (

File "C:\Python24\lib\site-packages\django\utils\functional.py", line 55, in _

curried

return _curried_func(*(args+moreargs), dict(kwargs, morekwargs))

File "C:\Python24\lib\site-packages\django\db\models\fields\related.py", line

770, in _get_m2m_db_table

return self.rel.through_model._meta.db_table

AttributeError?: 'ManyToManyRel?' object has no attribute 'through_model'

[evan.reiser@…]

er sorry didnt enter the ticket correctly

[andrew]

This looks suspiciously like a Django bug; that last line of the traceback is in a core Django part, and it's definitely called self.through. What Django version are you using?

[evan.reiser@…]

I think we were using django r9037 (post 1.0) which is pretty old, so that def might be the problem

[andrew]

Any update on this?

[andrew]

This seems to be fixed with recent Djangos, so marking as fixed.