              model = model._meta.proxy_for_model
          return model._meta
  
      def _get_from_cache(self, opts):
          key = (opts.app_label, opts.object_name.lower())
          return self.__class__._cache[self.db][key]
  
      def get_for_model(self, model, for_concrete_model=True):
          """
          Returns the ContentType object for a given model, creating the
 
</s> remove     return '%s_%s' % (action, opts.object_name.lower())
 </s> add     return '%s_%s' % (action, opts.model_name) </s> remove         key = (model._meta.app_label, model._meta.object_name.lower())
 </s> add         key = (model._meta.app_label, model._meta.model_name) </s> remove                                     (opts.app_label, opts.module_name),
 </s> add                                     (opts.app_label, opts.model_name), </s> remove         module_name, perm_name = perm_name.split('.', 1)
        return self[module_name][perm_name]
 </s> add         app_label, perm_name = perm_name.split('.', 1)
        return self[app_label][perm_name] </s> remove         self.name = '%s:%s' % (self.opts.app_label, self.opts.module_name)
        self.var_name = self.opts.object_name.lower()
 </s> add         self.name = '%s:%s' % (self.opts.app_label, self.opts.model_name)
        self.var_name = self.opts.model_name
        key = (opts.app_label, opts.model_name)
              model = model._meta.proxy_for_model
          return model._meta
  
      def _get_from_cache(self, opts):
        key = (opts.app_label, opts.model_name)
          return self.__class__._cache[self.db][key]
  
      def get_for_model(self, model, for_concrete_model=True):
          """
          Returns the ContentType object for a given model, creating the
keep keep keep keep replace keep keep keep keep keep
 Fixed #19689 -- Renamed `Model._meta.module_name` to `model_name`. 
django/contrib/contenttypes/models.py