Fixed #25910 -- Rejected read-only property names in model constructors.

django/db/models/base.py

@@ -435,7 +435,8 @@ class Model(six.with_metaclass(ModelBase)):
             for prop in list(kwargs):
                 try:
                     if isinstance(getattr(self.__class__, prop), property):
-                        setattr(self, prop, kwargs.pop(prop))
+                        setattr(self, prop, kwargs[prop])
+                        del kwargs[prop]
                 except AttributeError:
                     pass
             if kwargs:

tests/properties/tests.py

@@ -18,6 +18,10 @@ class PropertyTests(TestCase):
         # The "full_name" property hasn't provided a "set" method.
         self.assertRaises(AttributeError, setattr, self.a, 'full_name', 'Paul McCartney')
 
+        # And cannot be used to initialize the class.
+        with self.assertRaisesMessage(TypeError, "'full_name' is an invalid keyword argument"):
+            Person(full_name='Paul McCartney')
+
         # But "full_name_2" has, and it can be used to initialize the class.
         a2 = Person(full_name_2='Paul McCartney')
         a2.save()