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
27933	FieldDoesNotExist if remove foreign key and remove unique constraint at the same time	Jindi Wu	nobody	"Remove foreign key `b` and `unique_together` constraint from model like following:
{{{
class A(models.Model):
    name = models.CharField(max_length=10)
    b = models.ForeignKey('B')

    class Meta:
        unique_together = (('b','name'),)

class B(models.Model):
    text = models.CharField(max_length=10)
}}}

-->

{{{
class A(models.Model):
    name = models.CharField(max_length=10)

    class Meta:
        unique_together = (('name'),)

class B(models.Model):
    text = models.CharField(max_length=10)
}}}

Such error will be thrown.

{{{
raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name))
django.core.exceptions.FieldDoesNotExist: A has no field named 'b'
}}}

However if swap the order of generated two operations within the migration `AlterUniqueTogether` and `RemoveField`, it'll work.

Is this a bug or am I using Django the wrong way?

Sample app that can reproduce the issue is attached. 
"	Bug	closed	Migrations	1.10	Normal	duplicate			Unreviewed	0	0	0	0	0	0