From e13575c50688b4153a5df9ace4c01c1ecc20bc3c Mon Sep 17 00:00:00 2001
From: Gaetan Delannay <gaetan.delannay@gmail.com>
Date: Wed, 13 Jun 2012 09:31:09 +0200
Subject: [PATCH] Added method Wrapper.isEmpty(name) that checks if the content
 of some field is empty or not on a given object.

---
 gen/model.py             |   3 ++-
 gen/ui/doc.png           | Bin 818 -> 829 bytes
 gen/ui/odt.png           | Bin 754 -> 784 bytes
 gen/wrappers/__init__.py |   8 ++++++++
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gen/model.py b/gen/model.py
index 0de3005..eeb13af 100644
--- a/gen/model.py
+++ b/gen/model.py
@@ -178,7 +178,8 @@ class Group(ModelClass):
     roles = gen.String(validator=gen.Selection('getGrantableRoles'),
                        multiplicity=(0,None), **m)
     users = gen.Ref(User, multiplicity=(0,None), add=False, link=True,
-                    back=gen.Ref(attribute='groups', show=User.showRoles),
+                    back=gen.Ref(attribute='groups', show=User.showRoles,
+                                 multiplicity=(0,None)),
                     showHeaders=True, shownInfo=('title', 'login'))
 
 # The Translation class --------------------------------------------------------
diff --git a/gen/ui/doc.png b/gen/ui/doc.png
index 145731bf69f44bc1a8312c8f64411ccaa607b197..bdc852b76998845686050b9be93d57c58ef66f4e 100644
GIT binary patch
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delta 173
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diff --git a/gen/ui/odt.png b/gen/ui/odt.png
index 6db5643ab4c84a2e154f5fb1f5a87f13a6310b6d..74710e4be0576558260e269d224029e4555a04df 100644
GIT binary patch
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diff --git a/gen/wrappers/__init__.py b/gen/wrappers/__init__.py
index 5fbd244..ad6b8cf 100644
--- a/gen/wrappers/__init__.py
+++ b/gen/wrappers/__init__.py
@@ -125,6 +125,14 @@ class AbstractWrapper(object):
                 return customUser.__dict__[methodName](self, *args, **kwargs)
 
     def getField(self, name): return self.o.getAppyType(name)
+    def isEmpty(self, name):
+        '''Returns True if value of field p_name is considered as being
+           empty.'''
+        obj = self.o
+        if hasattr(obj.aq_base, name):
+            field = obj.getAppyType(name)
+            return field.isEmptyValue(getattr(obj, name))
+        return True
 
     def link(self, fieldName, obj):
         '''This method links p_obj (which can be a list of objects) to this one