Ticket #10808: model_inheritance.py.diff

models.py

@@ -116 +116 @@
     def __unicode__(self):
         return u"%s the parking lot" % self.name
 
+#
+# Diamond inheritance test
+# 
+class FoodPlace(models.Model):
+    name = models.CharField(max_length=255)
+
+class Bar(FoodPlace):
+    pass
+
+class Pizzeria(FoodPlace):
+    pass
+
+class PizzeriaBar(Bar, Pizzeria):
+    pizza_bar_specific_field = models.CharField(max_length = 255)
+
 __test__ = {'API_TESTS':"""
 # The Student and Worker models both have 'name' and 'age' fields on them and
 # inherit the __unicode__() method, just as with normal Python subclassing.
@@ -310 +325 @@
 3
 >>> settings.DEBUG = False
 
+# Test of diamond inheritance __init__. If B and C inherit from A, and D inherits from B and C, we should be able to use __init__ for D to properly set all the fields, regardless of the redundant copies of A's fields that D inherits from B and C.
+
+>>> p = PizzeriaBar(name="Mike's", pizza_bar_specific_field="Doodle")
+>>> p.name == "Mike's"
+True
+>>> p.pizza_bar_specific_field == "Doodle"
+True
 """}