[1.7.x] Appeased flake8.

from django.db import models

from django.test import TestCase, override_settings

from django.utils import six

from django.core.files.storage import FileSystemStorage

class FieldDeconstructionTests(TestCase):

        Tests the RunPython operation correctly handles the "atomic" keyword

        """

        project_state = self.set_up_test_model("test_runpythonatomic", mti_model=True)

        def inner_method(models, schema_editor):

            Pony = models.get_model("test_runpythonatomic", "Pony")

            Pony.objects.create(pink=1, weight=3.55)

            raise ValueError("Adrian hates ponies.")

        atomic_migration = Migration("test", "test_runpythonatomic")

        atomic_migration.operations = [migrations.RunPython(inner_method)]

        non_atomic_migration = Migration("test", "test_runpythonatomic")

            self.assertEqual(project_state.render().get_model("test_runpythonatomic", "Pony").objects.count(), 1)

class MigrateNothingRouter(object):

    """

    A router that sends all writes to the other database.

        Tests adding fields to models with a default that is not directly

        valid in the database (#22581)

        """

        class TestTransformField(IntegerField):

            # Weird field that saves the count of items in its value

            def get_default(self):

                return self.default

            def get_prep_value(self, value):

                if value is None:

                    return 0

                return len(value)

        # Create the table

        with connection.schema_editor() as editor:

            editor.create_model(Author)