Renamed registered_model to has_model.

This avoids possible confusion with register_model.

Thanks Marc Tamlyn for the suggestion.

django/core/apps/cache.py

@@ -298,12 +298,12 @@ class AppCache(object):
         models[model_name] = model
         self._get_models_cache.clear()
 
-    def registered_model(self, app_label, model_name):
+    def has_model(self, app_label, model_name):
         """
-        Test if a model is registered and return the model class or None.
+        Returns the model class if one is registered and None otherwise.
 
         It's safe to call this method at import time, even while the app cache
-        is being populated.
+        is being populated. It returns None for models that aren't loaded yet.
         """
         return self.all_models[app_label].get(model_name.lower())
 

django/db/models/base.py

@@ -151,7 +151,7 @@ class ModelBase(type):
                 new_class._base_manager = new_class._base_manager._copy_to_model(new_class)
 
         # Bail out early if we have already created this class.
-        m = new_class._meta.app_cache.registered_model(new_class._meta.app_label, name)
+        m = new_class._meta.app_cache.has_model(new_class._meta.app_label, name)
         if m is not None:
             return m
 
@@ -278,7 +278,7 @@ class ModelBase(type):
         # the first time this model tries to register with the framework. There
         # should only be one class for each model, so we always return the
         # registered version.
-        return new_class._meta.app_cache.registered_model(new_class._meta.app_label, name)
+        return new_class._meta.app_cache.has_model(new_class._meta.app_label, name)
 
     def copy_managers(cls, base_managers):
         # This is in-place sorting of an Options attribute, but that's fine.

django/db/models/fields/related.py

@@ -68,7 +68,7 @@ def add_lazy_relation(cls, field, relation, operation):
     # string right away. If get_model returns None, it means that the related
     # model isn't loaded yet, so we need to pend the relation until the class
     # is prepared.
-    model = cls._meta.app_cache.registered_model(app_label, model_name)
+    model = cls._meta.app_cache.has_model(app_label, model_name)
     if model:
         operation(field, model, cls)
     else: