Implement renderForValue on ContentTreeBase in order to make …

…single valued relation fields work.
plone · Oct 20, 2014 · bf0f6cb · bf0f6cb
1 parent 3467922
commit bf0f6cb
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diff --git a/docs/HISTORY.txt b/docs/HISTORY.txt
@@ -4,6 +4,10 @@ Changelog
 1.0.8 (unreleased)
 ------------------
 
+* Implement ``renderForValue`` on ``ContentTreeBase`` in order to make
+  single valued relation fields work.
+  [rnixx]
+
 * Work around bizarro Diazo encoding bug
   [gyst]
 

diff --git a/plone/formwidget/contenttree/widget.py b/plone/formwidget/contenttree/widget.py
@@ -216,6 +216,24 @@ def render(self):
         else:
             return self.input_template(self)
 
+    def renderForValue(self, value):
+        try:
+            return super(ContentTreeBase, self).renderForValue(value)
+        except LookupError, e:
+            if value != z3c.form.widget.SequenceWidget.noValueToken:
+                raise e
+        item = {
+            'id': '%s-0' % self.id,
+            'name': self.name,
+            'value': '',
+            'checked': 'checked',
+        }
+        template = getMultiAdapter(
+            (self.context, self.request, self.form, self.field, self),
+            IPageTemplate, name=self.mode + '_single'
+        )
+        return template(self, item)
+
     def js_extra(self):
         # Get bound source to extract path
         source = self.bound_source