When multiple classes inherit from an abstract class

only the first class get a chance to work

fixes #256

Author: ticosax

django_fsm/__init__.py

@@ -426,7 +426,6 @@ def is_field_transition_method(attr):
                     attr._django_fsm.field in [self, self.name]
                     or (
                         isinstance(attr._django_fsm.field, Field)
-                        and issubclass(self.model, attr._django_fsm.field.model)
                         and attr._django_fsm.field.name == self.name
                         and attr._django_fsm.field.creation_counter == self.creation_counter
                     )

django_fsm/tests/test_abstract_inheritance.py

@@ -15,6 +15,17 @@ def publish(self):
         pass
 
 
+class AnotherFromAbstractModel(BaseAbstractModel):
+    """
+    This class exists to trigger a regression when multiple concrete classes
+    inherit from a shared abstract class (example: BaseAbstractModel).
+    Don't try to remove it.
+    """
+    @transition(field="state", source="published", target="sticked")
+    def stick(self):
+        pass
+
+
 class InheritedFromAbstractModel(BaseAbstractModel):
     @transition(field="state", source="published", target="sticked")
     def stick(self):