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
25818	Unable to sqaush migrations that use RunSQL operations with state_operations	Simon Kelly	nobody	"As a workaround to this bug: https://code.djangoproject.com/ticket/25817 I have the following custom migration:

{{{#!python
operations = [
        migrations.RenameField(
            model_name='bar',
            old_name='bar_id',
            new_name='external_id',
        ),
        migrations.RunSQL(
            'SELECT 1',
            'SELECT 1',
            state_operations=[
                migrations.AlterField(
                    model_name='bazz',
                    name='bar',
                    field=models.ForeignKey(to='form_processor.Bar', to_field=b'external_id'),
                    preserve_default=True,
                ),
            ]
        )
    ]
}}}

When I try and squash this migration I get the following error:
{{{
$ ./manage.py squashmigrations form_processor 0002
Will squash the following migrations:
 - 0001_initial
 - 0002_rename_bar_id_to_external_id
Do you wish to proceed? [yN] y
Optimizing...
Traceback (most recent call last):
  File ""./manage.py"", line 73, in <module>
    execute_from_command_line(sys.argv)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/core/management/__init__.py"", line 385, in execute_from_command_line
    utility.execute()
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/core/management/__init__.py"", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/core/management/base.py"", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/core/management/base.py"", line 338, in execute
    output = self.handle(*args, **options)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/core/management/commands/squashmigrations.py"", line 130, in handle
    fh.write(writer.as_string())
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 131, in as_string
    operation_string, operation_imports = OperationWriter(operation).serialize()
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 88, in serialize
    arg_string, arg_imports = MigrationWriter.serialize(arg_value)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 263, in serialize
    item_string, item_imports = cls.serialize(item)
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 350, in serialize
    return cls.serialize_deconstructed(*value.deconstruct())
  File ""/home/skelly/.virtualenvs/hq/local/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 226, in serialize_deconstructed
    module, name = path.rsplit(""."", 1)
ValueError: need more than 1 value to unpack
}}}

On further examination it seems that the 'path' to the operation is being passed in without the module reference i.e. 'AlterField' instead of 'migrations.AlterField'. It's also possible that something else is going wrong since all the other paths being passed to 'serialize_deconstructed' are for actual field classes e.g. 'django.db.models.CharField'."	Bug	new	Migrations	1.7	Normal				Unreviewed	0	0	0	0	0	0