UPD: improved Event Update Form.

dav_events/views/events.py

@@ -211,6 +211,18 @@ class EventUpdateView(EventPermissionMixin, generic.UpdateView):
         self.enforce_permission(obj)
         return obj
 
+    def get_form(self, form_class=None):
+        form = super(EventUpdateView, self).get_form(form_class)
+        if not self.has_permission('accept', self.object):
+            form.fields['registration_howto'].disabled = True
+            form.fields['planned_publication_date'].disabled = True
+            form.fields['planned_publication_date'].widget = forms.generic.forms.HiddenInput()
+            form.fields['number'].disabled = True
+            form.fields['number'].widget = forms.generic.forms.HiddenInput()
+            form.fields['owner'].disabled = True
+            form.fields['owner'].widget = forms.generic.forms.HiddenInput()
+        return form
+
     def get_context_data(self, **kwargs):
         context = super(EventUpdateView, self).get_context_data(**kwargs)
         obj = context.get('event')
@@ -221,6 +233,12 @@ class EventUpdateView(EventPermissionMixin, generic.UpdateView):
         context['is_publishing'] = obj.workflow.has_reached_status('publishing')
         context['is_publishing_any'] = obj.workflow.has_reached_status('publishing*')
         context['is_accepted'] = obj.workflow.has_reached_status('accepted')
+
+        if 'form' in kwargs and kwargs['form'].errors:
+            context['decollapseAllForms'] = True
+        else:
+            context['decollapseFirstForm'] = True
+
         return context
 
     def form_valid(self, form):