#25154: Migration errors don't contain enough information to debug properly
------------------------------+--------------------
Reporter: brandonmoser | Owner: nobody
Type: New feature | Status: new
Component: Migrations | Version: 1.7
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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After creating a migration, via `makemigrations`, I attempted to run
`sqlmigrate`, but received the following error. I have 3 migrations using
the object referenced. It would be helpful to add the exact migration
operation in the traceback. I think the migration traceback should, also,
show the model/table and column that is part of the error.
{{{
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/__init__.py", line 385, in
execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/commands/sqlmigrate.py", line 30, in
execute
return super(Command, self).execute(*args, **options)
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-
packages/django/core/management/commands/sqlmigrate.py", line 61, in
handle
sql_statements = executor.collect_sql(plan)
File "/usr/local/lib/python2.7/dist-
packages/django/db/migrations/executor.py", line 82, in collect_sql
migration.apply(project_state, schema_editor, collect_sql=True)
File "/usr/local/lib/python2.7/dist-
packages/django/db/migrations/migration.py", line 108, in apply
operation.database_forwards(self.app_label, schema_editor,
project_state, new_state)
File "/usr/local/lib/python2.7/dist-
packages/django/db/migrations/operations/fields.py", line 139, in
database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/usr/local/lib/python2.7/dist-
packages/django/db/backends/schema.py", line 460, in alter_field
return self._alter_many_to_many(model, old_field, new_field, strict)
File "/usr/local/lib/python2.7/dist-
packages/django/db/backends/schema.py", line 764, in _alter_many_to_many
new_field.rel.through._meta.get_field_by_name(new_field.m2m_reverse_field_name())[0],
File "/usr/local/lib/python2.7/dist-
packages/django/utils/functional.py", line 17, in _curried
return _curried_func(*(args + moreargs), **dict(kwargs, **morekwargs))
File "/usr/local/lib/python2.7/dist-
packages/django/db/models/fields/related.py", line 2224, in
_get_m2m_reverse_attr
return getattr(self, cache_attr)
AttributeError: 'VersionedManyToManyField' object has no attribute
'_m2m_reverse_name_cache'
}}}
'''Note''': I have posted this error to the CleanerVersion team due to the
exact error.
--
Ticket URL: <https://code.djangoproject.com/ticket/25154>
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