Several bugfixes while handling abstract classes (appy.gen) and added a first code chunk used while installing a gen-application for Plone 3.

gen/plone25/installer.py

@@ -237,6 +237,7 @@ class PloneInstaller:
         # Creates the new-way templates for Pod fields if they do not exist.
         for contentType, attrNames in self.attributes.iteritems():
             appyClass = self.tool.getAppyClass(contentType)
+            if not appyClass: continue # May be an abstract class
             for attrName in attrNames:
                 appyType = getattr(appyClass, attrName)
                 if appyType.type == 'Pod':

gen/plone25/mixins/FlavourMixin.py

@@ -261,7 +261,7 @@ class FlavourMixin(AbstractMixin):
            being effectively used in the search screen.'''
         res = []
         appyClass = self.getAppyClass(contentType)
-        for attrName in getattr(self, 'searchFieldsFor%s' % contentType):
+        for attrName in getattr(self, 'searchFieldsFor%s' % contentType, ()):
             attr = getattr(appyClass, attrName)
             dAttr = self._appy_getTypeAsDict(attrName, attr, appyClass)
             res.append((attrName, dAttr))

gen/plone25/mixins/ToolMixin.py

@@ -333,13 +333,14 @@ class ToolMixin(AbstractMixin):
         '''Gets the Appy Python class that is related to p_contentType.'''
         # Retrieve first the Archetypes class corresponding to p_ContentType
         portalType = self.portal_types.get(contentType)
+        if not portalType: return None
         atClassName = portalType.getProperty('content_meta_type')
         appName = self.getProductConfig().PROJECTNAME
         exec 'from Products.%s.%s import %s as atClass' % \
             (appName, atClassName, atClassName)
         # Get then the Appy Python class
         return atClass.wrapperClass.__bases__[-1]
-        
+
     def getCreateMeans(self, contentTypeOrAppyClass):
         '''Gets the different ways objects of p_contentTypeOrAppyClass (which
            can be a Plone content type or a Appy class) can be created

gen/plone25/mixins/__init__.py

@@ -261,7 +261,10 @@ class AbstractMixin:
                         return t('%s_%s_list_%s' % (self.meta_type, name, v))
             if not isinstance(v, basestring):
                 # Archetypes "Description" fields may hold a BaseUnit instance.
-                v = unicode(v)
+                try:
+                    v = unicode(v)
+                except UnicodeDecodeError:
+                    v = str(v)
             return v
         elif vType == 'Boolean':
             if v: return self.translate('yes', domain='plone')