Use acts_as_nested_set instead of acts_as_tree for project hierarchy.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/work@2149 e93f8b46-1217-0410-a6f0-8f06a7374b81

nested_projects/test/fixtures/projects.yml

@@ -10,6 +10,8 @@ projects_001:
   is_public: true
   identifier: ecookbook
   parent_id: 
+  lft: 1
+  rgt: 8
 projects_002: 
   created_on: 2006-07-19 19:14:19 +02:00
   name: OnlineStore
@@ -21,6 +23,8 @@ projects_002:
   is_public: false
   identifier: onlinestore
   parent_id: 
+  lft: 9
+  rgt: 10
 projects_003: 
   created_on: 2006-07-19 19:15:21 +02:00
   name: eCookbook Subproject 1
@@ -32,6 +36,8 @@ projects_003:
   is_public: true
   identifier: subproject1
   parent_id: 1
+  lft: 4
+  rgt: 5
 projects_004: 
   created_on: 2006-07-19 19:15:51 +02:00
   name: eCookbook Subproject 2
@@ -43,6 +49,8 @@ projects_004:
   is_public: true
   identifier: subproject2
   parent_id: 1
+  lft: 6
+  rgt: 7
 projects_005: 
   created_on: 2006-07-19 19:15:51 +02:00
   name: Private child of eCookbook
@@ -52,6 +60,8 @@ projects_005:
   description: This is a private subproject of a public project
   homepage: ""
   is_public: false
-  identifier: private_child
+  identifier: private-child
   parent_id: 1
+  lft: 2
+  rgt: 3