Add backwards compatible accessors for ldap_cn and ldap_access

app/models/group.rb

@@ -80,4 +80,21 @@ class Group < Namespace
   def public_profile?
     projects.public_only.any?
   end
+
+  # NOTE: Backwards compatibility with old ldap situation
+  def ldap_cn
+    ldap_group_links.first.try(:cn)
+  end
+
+  def ldap_access
+    ldap_group_links.first.try(:group_access)
+  end
+
+  def old_ldap_cn
+    read_attribute(:ldap_cn)
+  end
+
+  def old_ldap_access
+    read_attribute(:ldap_access)
+  end
 end

db/migrate/20140813090117_add_ldap_groups_table.rb

@@ -7,12 +7,6 @@ class AddLdapGroupsTable < ActiveRecord::Migration
 
       t.timestamps
     end
-
-    Group.where.not(ldap_cn: nil).each do |group|
-      group.ldap_groups.where(cn: group.ldap_cn).first_or_create do |ldap_group|
-        ldap_group.group_access = group.ldap_access
-      end
-    end
   end
 
   def down

db/migrate/20140813133925_rename_ldap_group_to_ldap_group_link.rb

 class RenameLdapGroupToLdapGroupLink < ActiveRecord::Migration
-  def change
+  def up
     rename_table :ldap_groups, :ldap_group_links
+
+    # NOTE: we use the old_ methods because the new methods are overloaded
+    # for backwards compatibility
+    Group.where.not(ldap_cn: nil).each do |group|
+      group.ldap_group_links.where(cn: group.old_ldap_cn).first_or_create do |ldap_group_link|
+        ldap_group_link.group_access = group.old_ldap_access
+      end
+    end
+  end
+
+  def down
+    rename_table :ldap_group_links, :ldap_groups
   end
 end