add a dict like interface for selection tool, so that we can use this kind of

TALES expressions:
context/portal_selections/test_selection/not_found | string:default


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17543 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/SelectionTool.py

@@ -191,6 +191,9 @@ class SelectionTool( BaseTool, UniqueObject, SimpleItem ):
       if selection is not None:
         return selection.__of__(self)
 
+    def __getitem__(self, key):
+        return self.getSelectionParamsFor(key)
+
     security.declareProtected(ERP5Permissions.View, 'setSelectionFor')
     def setSelectionFor(self, selection_name, selection_object, REQUEST=None):
       """

product/ERP5Form/tests/testSelectionTool.py

@@ -84,6 +84,18 @@ class TestSelectionTool(ERP5TypeTestCase):
     self.assertEquals({'key':'value'},
                       self.portal_selections.getSelectionParamsFor('test_selection'))
 
+  def testGetSelectionParamsDictInterface(self):
+    self.assertEquals('value',
+                      self.portal_selections['test_selection']['key'])
+    # the main use case is to have a dict interface in TALES expressions:
+    from Products.PageTemplates.Expressions import getEngine
+    evaluate_tales = getEngine().getContext(dict(context=self.portal)).evaluate
+    self.assertEquals('value',
+            evaluate_tales('context/portal_selections/test_selection/key'))
+    self.assertEquals('default', evaluate_tales(
+      'context/portal_selections/test_selection/not_found | string:default'))
+
+
   def testCallSelectionFor(self, quiet=quiet, run=run_all_test):
     if not run: return
     self.assertEquals(None,