Ticket #2843: include_reverse_relations.diff

django/core/serializers/xml_serializer.py

@@ -5 +5 @@
 from django.conf import settings
 from django.core.serializers import base
 from django.db import models
+from django.db.models.fields.related import OneToOneRel
 from django.utils.xmlutils import SimplerXMLGenerator
 from xml.dom import pulldom
 
@@ -88 +89 @@
             self.xml.addQuickElement("object", attrs={"pk" : str(relobj._get_pk_val())})
         self.xml.endElement("field")
         
+    def handle_o2m_field(self, obj, field):
+        if not isinstance(field.field.rel, OneToOneRel):
+            self.xml.startElement("field", {
+                "name" : field.get_accessor_name(),
+                "rel"  : field.field.rel.__class__.__name__,
+                "to"   : field.field.name,
+            })
+            for relobj in getattr(obj, field.get_accessor_name()).iterator():
+                self.xml.addQuickElement("object", attrs={"pk" : str(relobj._get_pk_val())})
+            self.xml.endElement("field")
+    
     def _start_relational_field(self, field):
         """
         Helper to output the <field> element for relational fields
@@ -218 +230 @@
             inner_text.extend(getInnerText(child))
         else:
            pass
-    return "".join(inner_text)
- No newline at end of file
+    return "".join(inner_text)

django/core/serializers/base.py

@@ -30 +30 @@
         self.stream = options.get("stream", StringIO())
         self.selected_fields = options.get("fields")
 
+        self.include_reverse_relations = options.get("include_reverse_relations", False)
+        if self.options.has_key("include_reverse_relations"):
+            del self.options["include_reverse_relations"]
+
         self.start_serialization()
         for obj in queryset:
             self.start_object(obj)
@@ -45 +49 @@
             for field in obj._meta.many_to_many:
                 if self.selected_fields is None or field.attname in self.selected_fields:
                     self.handle_m2m_field(obj, field)
+            if self.include_reverse_relations:
+                for field in obj._meta.get_all_related_objects():
+                    self.handle_o2m_field(obj, field)
             self.end_object(obj)
         self.end_serialization()
         return self.getvalue()
@@ -107 +114 @@
         """
         raise NotImplementedError
 
+    def handle_o2m_field(self, obj, field):
+        """
+        Called to handle a OneToManyField.
+        """
+        raise NotImplementedError
+
     def getvalue(self):
         """
         Return the fully serialized queryset.