added tracking versions to graphs, nodes

Gemfile.lock

@@ -79,6 +79,9 @@ GEM
     mime-types (1.19)
     multi_json (1.3.6)
     nokogiri (1.5.5)
+    paper_trail (2.6.3)
+      activerecord (~> 3.0)
+      railties (~> 3.0)
     pg (0.14.0)
     polyglot (0.3.3)
     rack (1.4.1)
@@ -131,7 +134,6 @@ GEM
       hike (~> 1.2)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
-    sqlite3 (1.3.5)
     therubyracer (0.10.2)
       libv8 (~> 3.3.10)
     thor (0.14.6)
@@ -157,10 +159,10 @@ DEPENDENCIES
   database_cleaner
   dynamic_form
   jquery-rails
+  paper_trail
   pg
   rails (= 3.2.3)
   rspec-rails (~> 2.0)
   rufus-scheduler (~> 2.0.17)
-  sqlite3 (= 1.3.5)
   therubyracer
   uglifier (>= 1.0.3)

app/controllers/graphs_controller.rb

@@ -115,4 +115,9 @@ def groups_widget
 
     render :partial => "groups_widget", :layout => false#, :layout => !request.xhr?
   end
+
+  def versions
+    @graphs = Graph.find(params[:graph_id]).versions.map { |v| v.item }
+    render 'index'
+  end
 end

app/controllers/nodes_controller.rb

@@ -130,4 +130,9 @@ def node_widget
 
     render :partial => 'node_widget'
   end
+
+  def versions
+    @nodes = Node.find(params[:id]).versions.map { |v| v.item }
+    render 'index'
+  end
 end

app/models/graph.rb

@@ -14,6 +14,8 @@ class Graph < ActiveRecord::Base
   # Validations
   validates :name, :presence => true, :uniqueness => true
 
+  has_paper_trail
+
   def all_subgraphs_naive
     return [] if subgraphs.nil?
     result = subgraphs

app/models/node.rb

@@ -21,6 +21,8 @@ class Node < ActiveRecord::Base
   # Validations
   validates :title, :presence => true, :uniqueness => true
 
+  has_paper_trail
+
   def related_nodes
     related_nodes_A | related_nodes_B
   end

app/views/graphs/versions.html.erb

@@ -0,0 +1,2 @@
+<%= render :partial => "application/flash", :locals => { :flash => flash } %>
+<div id="graphData" style="display:none" data-graph_id="<%= @graph.id if @graph %>" data-graph_nodes="<%= @graph.nodes.map{ |n| n.id }.to_json if @graph %>" data-all_graph_nodes="<%= @graph.all_nodes.map{ |n| n.id }.to_json if @graph %>" data-node_id="<%= @node.id if @node %>" ></div>

config/routes.rb

@@ -8,11 +8,13 @@
 
   resources :graphs do
     get "groups_widget" => "graphs#groups_widget", :as => "groups_widget"
+    get "versions" => "graphs#versions", :as => "graph_versions"
   end
 
   resources :nodes do
     get "learning_path" => "nodes#learning_path", :as => "learning_path"
     get "node_widget" => "nodes#node_widget", :as => "node_widget"
+    get "versions" => "nodes#versions", :as => "node_versions"
   end
 
   resources :courses do

db/migrate/20120814002222_create_versions.rb

@@ -0,0 +1,18 @@
+class CreateVersions < ActiveRecord::Migration
+  def self.up
+    create_table :versions do |t|
+      t.string   :item_type, :null => false
+      t.integer  :item_id,   :null => false
+      t.string   :event,     :null => false
+      t.string   :whodunnit
+      t.text     :object
+      t.datetime :created_at
+    end
+    add_index :versions, [:item_type, :item_id]
+  end
+
+  def self.down
+    remove_index :versions, [:item_type, :item_id]
+    drop_table :versions
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120809211628) do
+ActiveRecord::Schema.define(:version => 20120814002222) do
 
   create_table "actions", :force => true do |t|
     t.integer  "user_id"
@@ -127,4 +127,15 @@
     t.boolean  "track",         :default => true
   end
 
+  create_table "versions", :force => true do |t|
+    t.string   "item_type",  :null => false
+    t.integer  "item_id",    :null => false
+    t.string   "event",      :null => false
+    t.string   "whodunnit"
+    t.text     "object"
+    t.datetime "created_at"
+  end
+
+  add_index "versions", ["item_type", "item_id"], :name => "index_versions_on_item_type_and_item_id"
+
 end