fix unnecessary field-name/model-name conflicts (i.e. field_name == model_name.lower() )

=> __init__ + __getattribute__ now handle only the Django inheritance
references that are needed ('modela_ptr', 'modelc' etc.), avoiding
unnecessary conflicts with field names.

.gitignore

@@ -5,6 +5,7 @@
 .project
 .pydevproject
 .settings
+nbproject
 
 tmp
 libraries-local

polymorphic/polymorphic.py

@@ -678,11 +678,11 @@ class PolymorphicModel(models.Model):
     def __getattribute__(self, name):
         if name != '__class__':
             #if name.endswith('_ptr_cache'): # unclear if this should be handled as well
-            if name.endswith('_ptr'): name = name[:-4]
             model = self.__class__.sub_and_superclass_dict.get(name, None)
             if model:
                 id = super(PolymorphicModel, self).__getattribute__('id')
                 attr = model.base_objects.get(id=id)
+                #print '---',self.__class__.__name__,name
                 return attr
         return super(PolymorphicModel, self).__getattribute__(name)
 
@@ -690,21 +690,26 @@ class PolymorphicModel(models.Model):
     # containing all model attribute names we need to intercept
     # (do this once here instead of in __getattribute__ every time)
     def __init__(self, *args, **kwargs):
-        if not getattr(self.__class__, 'sub_and_superclass_dict', None):
+        if not self.__class__.__dict__.get('sub_and_superclass_dict', None):
+
+            def add_if_regular_sub_or_super_class(model, as_ptr, result):
+                if ( issubclass(model, models.Model) and model != models.Model
+                    and model != self.__class__ and model != PolymorphicModel):
+                    name = model.__name__.lower()
+                    if as_ptr: name+='_ptr'
+                    result[name] = model
             def add_all_base_models(model, result):
-                if issubclass(model, models.Model) and model != models.Model:
+                add_if_regular_sub_or_super_class(model, True, result)
-                    result[model.__name__.lower()] = model
                 for b in model.__bases__:
                     add_all_base_models(b, result)
-            def add_all_sub_models(model, result):
+            def add_sub_models(model, result):
-                if issubclass(model, models.Model) and model != models.Model:
-                    result[model.__name__.lower()] = model
                 for b in model.__subclasses__():
-                    add_all_sub_models(b, result)
+                    add_if_regular_sub_or_super_class(b, False, result)
 
             result = {}
-            add_all_base_models(self.__class__, result)
+            add_all_base_models(self.__class__,result)
-            add_all_sub_models(self.__class__, result)
+            add_sub_models(self.__class__,result)
+            #print '##',self.__class__.__name__,' - ',result
             self.__class__.sub_and_superclass_dict = result
 
         super(PolymorphicModel, self).__init__(*args, **kwargs)

polymorphic/tests.py

@@ -99,6 +99,9 @@ class BlogA_Entry(ShowFieldsAndTypes, PolymorphicModel):
     blog = models.ForeignKey(BlogA)
     text = models.CharField(max_length=10)
 
+class ModelFieldNameTest(PolymorphicModel):
+    modelfieldnametest = models.CharField(max_length=10)
+
 # test bad field name
 #class TestBadFieldModel(PolymorphicModel):
 #    instance_of = models.CharField(max_length=10)
@@ -303,12 +306,17 @@ __test__ = {"doctest": """
 >>> type(MROBase2._default_manager)
 <class 'polymorphic.tests.MyManager'>
 
+### fixed issue in PolymorphicModel.__getattribute__: field name same as model name
+>>> ModelFieldNameTest.objects.create(modelfieldnametest='1')
+<ModelFieldNameTest: id 1, modelfieldnametest (CharField)>
+
 ### Django model inheritance diamond problem, fails for Django 1.1
 
 #>>> o=DiamondXY.objects.create(field_b='b', field_x='x', field_y='y')
 #>>> print 'DiamondXY fields 1: field_b "%s", field_x "%s", field_y "%s"' % (o.field_b, o.field_x, o.field_y)
 #DiamondXY fields 1: field_b "a", field_x "x", field_y "y"
 
+
 >>> settings.DEBUG=False
 
 """}