patches: patch OFS to bring back old __repr__

When updating persistent to >= 4.4 `__repr__` of zope objects display
information about ZODB connection but it's more useful to have
information about the acquisition chain at this level.

This happens because `persistent.Persistent.__repr__` is used instead of 
`OFS.SimpleItem.Item.__repr__` (as of zope 2.13 ).

One notable case was proxy field error messages, it was supposed to
include the path of the proxy field in the error message. This one is
fixed by fixing the MRO so that persistent.Persistent does not appear
first.

/reviewed-on !991

product/ERP5Form/tests/testProxyField.py

@@ -385,3 +385,26 @@ return printed
     form_1_html = form_1.my_field.render(REQUEST=self.app.REQUEST).replace('\n', '')
     form_2_html = form_2.my_field.render(REQUEST=self.app.REQUEST).replace('\n', '')
     self.assertEqual(form_1_html, form_2_html)
+
+  def test_broken_proxy_field(self):
+    portal_skins = self.getSkinsTool()
+    portal_skins.manage_addProduct['OFSP'].manage_addFolder('erp5_geek')
+    skin_folder = portal_skins._getOb('erp5_geek')
+    skin_folder.manage_addProduct['ERP5Form'].addERP5Form(
+        'Base_viewGeek',
+        'View')
+    form = skin_folder._getOb('Base_viewGeek', None)
+    form.manage_addField('my_title', 'Title', 'ProxyField')
+
+    field = getattr(form, 'my_title')
+
+    self.assertIsNone(field.getTemplateField())
+    self.assertEqual('', field.render())
+    self.assertEqual('', field.get_tales('default'))
+    self.assertIsNone(field.get_value('default'))
+
+    with self.assertRaisesRegexp(
+        AttributeError,
+        'The proxy field <ProxyField at /%s/portal_skins/erp5_geek/Base_viewGeek/my_title> cannot find a template field'
+        % self.portal.getId()):
+      field.get_recursive_tales('default')

product/ERP5Type/patches/OFSFile.py

 from App.special_dtml import DTMLFile
 from OFS.Image import File
+from OFS.SimpleItem import Item
 from Products.ERP5Type import _dtmldir
 
 # Patch for displaying textearea in full window instead of
@@ -11,3 +12,7 @@ File.manage = manage_editForm
 File.manage_main = manage_editForm
 File.manage_editDocument = manage_editForm
 File.manage_editForm = manage_editForm
+
+# restore __repr__ after persistent > 4.4
+# https://github.com/zopefoundation/Zope/issues/379
+File.__repr__ = Item.__repr__

product/ERP5Type/patches/OFSFolder.py

@@ -15,6 +15,7 @@
 from AccessControl import ClassSecurityInfo
 from Products.ERP5Type.Globals import InitializeClass
 from OFS.Folder import Folder
+from OFS.SimpleItem import Item
 from Products.ERP5Type import Permissions
 
 """
@@ -63,3 +64,7 @@ security = ClassSecurityInfo()
 security.declareProtected(Permissions.ManagePortal, 'isERP5SitePresent')
 Folder.security = security
 InitializeClass(Folder)
+
+# restore __repr__ after persistent > 4.4
+# https://github.com/zopefoundation/Zope/issues/379
+Folder.__repr__ = Item.__repr__

product/ERP5Type/tests/testERP5Type.py

@@ -3286,6 +3286,16 @@ return [
       # but this did not affect the other role
       self.assertTrue(hasRole(role2))
 
+    def test_repr(self):
+      document = self.portal.organisation_module.newContent(
+          portal_type='Organisation',
+          id='organisation_id'
+      )
+      self.assertEqual(
+          '<Organisation at /%s/organisation_module/organisation_id>' % self.portal.getId(),
+          repr(document))
+
+
 class TestAccessControl(ERP5TypeTestCase):
   # Isolate test in a dedicaced class in order not to break other tests
   # when this one fails.

product/Formulator/Field.py

@@ -464,9 +464,9 @@ class Field:
 InitializeClass(Field)
 
 class ZMIField(
+    OFS.SimpleItem.Item,
     Acquisition.Implicit,
     Persistent,
-    OFS.SimpleItem.Item,
     Field,
     ):
     """Base class for a field implemented as a Python (file) product.