1 files changed, 38 insertions, 26 deletions
diff --git a/tests/m2m_through/models.py b/tests/m2m_through/models.py
index b7d674d142..47a0b75f4b 100644
--- a/tests/m2m_through/models.py
+++ b/tests/m2m_through/models.py
@@ -8,7 +8,7 @@ class Person(models.Model):
     name = models.CharField(max_length=128)
 
     class Meta:
-        ordering = ('name',)
+        ordering = ("name",)
 
 
 class PersonChild(Person):
@@ -17,16 +17,18 @@ class PersonChild(Person):
 
 class Group(models.Model):
     name = models.CharField(max_length=128)
-    members = models.ManyToManyField(Person, through='Membership')
-    custom_members = models.ManyToManyField(Person, through='CustomMembership', related_name="custom")
+    members = models.ManyToManyField(Person, through="Membership")
+    custom_members = models.ManyToManyField(
+        Person, through="CustomMembership", related_name="custom"
+    )
     nodefaultsnonulls = models.ManyToManyField(
         Person,
-        through='TestNoDefaultsOrNulls',
+        through="TestNoDefaultsOrNulls",
         related_name="testnodefaultsnonulls",
     )
 
     class Meta:
-        ordering = ('name',)
+        ordering = ("name",)
 
 
 class Membership(models.Model):
@@ -36,7 +38,7 @@ class Membership(models.Model):
     invite_reason = models.CharField(max_length=64, null=True)
 
     class Meta:
-        ordering = ('date_joined', 'invite_reason', 'group')
+        ordering = ("date_joined", "invite_reason", "group")
 
     def __str__(self):
         return "%s is a member of %s" % (self.person.name, self.group.name)
@@ -69,19 +71,25 @@ class TestNoDefaultsOrNulls(models.Model):
 
 class PersonSelfRefM2M(models.Model):
     name = models.CharField(max_length=5)
-    friends = models.ManyToManyField('self', through="Friendship", symmetrical=False)
-    sym_friends = models.ManyToManyField('self', through='SymmetricalFriendship', symmetrical=True)
+    friends = models.ManyToManyField("self", through="Friendship", symmetrical=False)
+    sym_friends = models.ManyToManyField(
+        "self", through="SymmetricalFriendship", symmetrical=True
+    )
 
 
 class Friendship(models.Model):
-    first = models.ForeignKey(PersonSelfRefM2M, models.CASCADE, related_name="rel_from_set")
-    second = models.ForeignKey(PersonSelfRefM2M, models.CASCADE, related_name="rel_to_set")
+    first = models.ForeignKey(
+        PersonSelfRefM2M, models.CASCADE, related_name="rel_from_set"
+    )
+    second = models.ForeignKey(
+        PersonSelfRefM2M, models.CASCADE, related_name="rel_to_set"
+    )
     date_friended = models.DateTimeField()
 
 
 class SymmetricalFriendship(models.Model):
     first = models.ForeignKey(PersonSelfRefM2M, models.CASCADE)
-    second = models.ForeignKey(PersonSelfRefM2M, models.CASCADE, related_name='+')
+    second = models.ForeignKey(PersonSelfRefM2M, models.CASCADE, related_name="+")
     date_friended = models.DateField()
 
 
@@ -90,35 +98,37 @@ class Event(models.Model):
     title = models.CharField(max_length=50)
     invitees = models.ManyToManyField(
         to=Person,
-        through='Invitation',
-        through_fields=['event', 'invitee'],
-        related_name='events_invited',
+        through="Invitation",
+        through_fields=["event", "invitee"],
+        related_name="events_invited",
     )
 
 
 class Invitation(models.Model):
-    event = models.ForeignKey(Event, models.CASCADE, related_name='invitations')
+    event = models.ForeignKey(Event, models.CASCADE, related_name="invitations")
     # field order is deliberately inverted. the target field is "invitee".
-    inviter = models.ForeignKey(Person, models.CASCADE, related_name='invitations_sent')
-    invitee = models.ForeignKey(Person, models.CASCADE, related_name='invitations')
+    inviter = models.ForeignKey(Person, models.CASCADE, related_name="invitations_sent")
+    invitee = models.ForeignKey(Person, models.CASCADE, related_name="invitations")
 
 
 class Employee(models.Model):
     name = models.CharField(max_length=5)
     subordinates = models.ManyToManyField(
-        'self',
+        "self",
         through="Relationship",
-        through_fields=('source', 'target'),
+        through_fields=("source", "target"),
         symmetrical=False,
     )
 
     class Meta:
-        ordering = ('pk',)
+        ordering = ("pk",)
 
 
 class Relationship(models.Model):
     # field order is deliberately inverted.
-    another = models.ForeignKey(Employee, models.SET_NULL, related_name="rel_another_set", null=True)
+    another = models.ForeignKey(
+        Employee, models.SET_NULL, related_name="rel_another_set", null=True
+    )
     target = models.ForeignKey(Employee, models.CASCADE, related_name="rel_target_set")
     source = models.ForeignKey(Employee, models.CASCADE, related_name="rel_source_set")
 
@@ -127,19 +137,21 @@ class Ingredient(models.Model):
     iname = models.CharField(max_length=20, unique=True)
 
     class Meta:
-        ordering = ('iname',)
+        ordering = ("iname",)
 
 
 class Recipe(models.Model):
     rname = models.CharField(max_length=20, unique=True)
     ingredients = models.ManyToManyField(
-        Ingredient, through='RecipeIngredient', related_name='recipes',
+        Ingredient,
+        through="RecipeIngredient",
+        related_name="recipes",
     )
 
     class Meta:
-        ordering = ('rname',)
+        ordering = ("rname",)
 
 
 class RecipeIngredient(models.Model):
-    ingredient = models.ForeignKey(Ingredient, models.CASCADE, to_field='iname')
-    recipe = models.ForeignKey(Recipe, models.CASCADE, to_field='rname')
+    ingredient = models.ForeignKey(Ingredient, models.CASCADE, to_field="iname")
+    recipe = models.ForeignKey(Recipe, models.CASCADE, to_field="rname")