id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 22344,Migration from ForeignKey to FileField fails: AttributeError: 'NoneType' object has no attribute 'to',Daniel Hahler,nobody,"The following migration fails to change the ForeignKey field into a FileField: {{{ migrations.AlterField( model_name='mainfile', name='file', field=models.FileField(upload_to='...'), ), }}} {{{ Applying app.0017_auto_20140326_1849...Traceback (most recent call last): File ""…/manage.py"", line 62, in execute_from_command_line(sys.argv) File ""…/django-master/django/core/management/__init__.py"", line 427, in execute_from_command_line utility.execute() File ""…/django-master/django/core/management/__init__.py"", line 419, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File ""…/django-master/django/core/management/base.py"", line 288, in run_from_argv self.execute(*args, **options.__dict__) File ""…/django-master/django/core/management/base.py"", line 337, in execute output = self.handle(*args, **options) File ""…/django-master/django/core/management/commands/migrate.py"", line 145, in handle executor.migrate(targets, plan, fake=options.get(""fake"", False)) File ""…/django-master/django/db/migrations/executor.py"", line 60, in migrate self.apply_migration(migration, fake=fake) File ""…/django-master/django/db/migrations/executor.py"", line 94, in apply_migration migration.apply(project_state, schema_editor) File ""…/django-master/django/db/migrations/migration.py"", line 97, in apply operation.database_forwards(self.app_label, schema_editor, project_state, new_state) File ""…/django-master/django/db/migrations/operations/fields.py"", line 127, in database_forwards from_field.rel.to = to_field.rel.to AttributeError: 'NoneType' object has no attribute 'to' ipdb> from_model, from_field, from_field.rel, to_field, to_field.rel , None) }}} ",Bug,closed,Migrations,dev,Normal,fixed,,,Accepted,0,0,0,0,0,0