provide display rendering for relation property with link (like for relation set)

expert/browser/search.py

@@ -158,7 +158,7 @@ class Search(BaseView):
                         adObj = adapted(o, self.languageInfo)
                         if filterMethod is not None and not filterMethod(adObj):
                             continue
-                        name = self.getRowName(adObj)
+                        name = self.getRowName(adObj) or u''
                         if title and title.endswith('*'):
                             title = title[:-1]
                         sort = ((title and name.startswith(title) and '0' or '1')

schema/base.py

@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2009 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2011 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -18,8 +18,6 @@
 
 """
 Specialized field definitions.
-
-$Id$
 """
 
 from zope.component import adapts
@@ -59,7 +57,8 @@ class Relation(Field):
     __typeInfo__ = ('relation',
                     FieldType('relation', 'relation',
                               u'A field representing a related object.',
-                              instanceName='relation'))
+                              instanceName='relation',
+                              displayRenderer='display_relation'))
 
     def __init__(self, *args, **kw):
         self.target_types = kw.pop('target_types', ())

schema/field.py

@@ -93,9 +93,14 @@ class RelationFieldInstance(FieldInstance, BaseRelationFieldInstance):
 
     def display(self, value):
         if value:
-            return value.title
+            nodeView = self.clientInstance.view.nodeView
+            return dict(url=nodeView.getUrlForTarget(baseObject(value)),
+                        label=value.title)
         return u''
 
     def unmarshall(self, value):
         return util.getObjectForUid(value)
 
+    def getRenderer(self, name):
+        return relation_macros.macros[name]
+

schema/relation_macros.pt

@@ -12,6 +12,12 @@
 </metal:display>
 
 
+<metal:display define-macro="display_relation">
+      <a tal:attributes="href value/url"
+         tal:content="value/label"></a>
+</metal:display>
+
+
 <metal:input define-macro="input_relationset"
              tal:define="fieldInstance field/getFieldInstance;
                          types fieldInstance/typesParams">