[1.7.x] Revert "Fixed #23455 -- Forced related_name to be a unicode string during deconstruction."

This reverts commit 45bd7b3bd9.

This is a backport of 8aaf51f94c from master.

django/db/models/fields/related.py

@@ -14,7 +14,7 @@ from django.db.models.lookups import IsNull
 from django.db.models.related import RelatedObject, PathInfo
 from django.db.models.query import QuerySet
 from django.db.models.sql.datastructures import Col
-from django.utils.encoding import force_text, smart_text
+from django.utils.encoding import smart_text
 from django.utils import six
 from django.utils.deprecation import RenameMethodsBase, RemovedInDjango18Warning
 from django.utils.translation import ugettext_lazy as _
@@ -1376,7 +1376,7 @@ class ForeignObject(RelatedField):
         kwargs['from_fields'] = self.from_fields
         kwargs['to_fields'] = self.to_fields
         if self.rel.related_name is not None:
-            kwargs['related_name'] = force_text(self.rel.related_name)
+            kwargs['related_name'] = self.rel.related_name
         if self.rel.related_query_name is not None:
             kwargs['related_query_name'] = self.rel.related_query_name
         if self.rel.on_delete != CASCADE:
@@ -2112,7 +2112,7 @@ class ManyToManyField(RelatedField):
         if self.rel.db_constraint is not True:
             kwargs['db_constraint'] = self.rel.db_constraint
         if self.rel.related_name is not None:
-            kwargs['related_name'] = force_text(self.rel.related_name)
+            kwargs['related_name'] = self.rel.related_name
         if self.rel.related_query_name is not None:
             kwargs['related_query_name'] = self.rel.related_query_name
         # Rel needs more work.

docs/releases/1.7.2.txt

@@ -124,3 +124,7 @@ Bugfixes
 
 * Fixed a crash in the admin when using "Save as new" and also deleting a
   related inline (:ticket:`23857`).
+
+* Removed auto-conversion of ``related_name`` to unicode in field
+  deconstruction, to maintain consistency of bytes/text in migrations matching
+  the original values (:ticket:`23455` and :ticket:`23982`).

tests/field_deconstruction/tests.py

@@ -211,12 +211,6 @@ class FieldDeconstructionTests(TestCase):
         self.assertEqual(path, "django.db.models.ForeignKey")
         self.assertEqual(args, [])
         self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "foobar"})
-        # Test related_name unicode conversion
-        field = models.ForeignKey("auth.Permission", related_name=b"foobar")
-        name, path, args, kwargs = field.deconstruct()
-        self.assertEqual(path, "django.db.models.ForeignKey")
-        self.assertEqual(args, [])
-        self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "foobar"})
 
     @override_settings(AUTH_USER_MODEL="auth.Permission")
     def test_foreign_key_swapped(self):
@@ -297,12 +291,6 @@ class FieldDeconstructionTests(TestCase):
         self.assertEqual(path, "django.db.models.ManyToManyField")
         self.assertEqual(args, [])
         self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "custom_table"})
-        # Test related_name unicode conversion
-        field = models.ManyToManyField("auth.Permission", related_name=b"custom_table")
-        name, path, args, kwargs = field.deconstruct()
-        self.assertEqual(path, "django.db.models.ManyToManyField")
-        self.assertEqual(args, [])
-        self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "custom_table"})
 
     @override_settings(AUTH_USER_MODEL="auth.Permission")
     def test_many_to_many_field_swapped(self):