Changed the relation init method

lodel/leapi/datahandlers/references/relation.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 from lodel.leapi.datahandlers.field_data_handler import FieldDataHandler
-from lodel.editorial_model.components import EmField
 
 
 class DataHandler(FieldDataHandler):
@@ -8,11 +7,12 @@ class DataHandler(FieldDataHandler):
     ## @brief Instanciates a Relation object
     # @param datahandler FieldDataHandler
     # @param datahandler_args dict
-    # @param reference str
+    # @param reference EmField
     # @param kwargs
     def __init__(self, datahandler, datahandler_args, reference, **kwargs):
 
-        self.backref_field = EmField(data_handler=datahandler, **datahandler_args)
+        data_handler_class = FieldDataHandler.from_name(datahandler)
+        self.data_handler = data_handler_class(**datahandler_args)
         self.backref_ref = reference
         super().__init__(**kwargs)