Added presentation

asyncron/base/models.py

@@ -48,10 +48,23 @@ class BaseModel( models.Model ):
 			await sync_to_async(lambda: [ getattr(self, f) for f in fields ])()
 
 
-	def fields_to_dict( self, *fields ):
+	_model_dict_presentations = {}
+	@classmethod
+	def dict_presentation( cls, name ):
+		def attacher_decorator( f ):
+			cls._model_dict_presentations[name] = f
+			return f
+		return attacher_decorator
+
+	def fields_to_dict( self, *fields, presentation_name = None ):
 		"""
 			To create json/dict from fields.
 		"""
+
+		if presentation_name:
+			assert presentation in self._model_dict_presentations, f"This model '{self.__class__}' does not have a '{presentation_name}' presentation!"
+			fields.extend( self._model_dict_presentations[presentation_name] )
+
 		results = {}
 		for f in fields:
 			name, method = (f[0], f[1]) if isinstance(f, tuple) else (f, f)