Added versioning of data

Gemfile

@@ -44,6 +44,8 @@ gem 'aws-sdk'
 
 gem 'stringex'
 
+gem 'paper_trail', '~> 3.0.1'
+
 group :production do
   gem 'rails_12factor'
 # gem 'unicorn'

Gemfile.lock

@@ -180,6 +180,9 @@ GEM
     nokogiri (1.6.1-x86-mingw32)
       mini_portile (~> 0.5.0)
     orm_adapter (0.5.0)
+    paper_trail (3.0.1)
+      activerecord (>= 3.0, < 5.0)
+      activesupport (>= 3.0, < 5.0)
     paperclip (4.1.1)
       activemodel (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -337,6 +340,7 @@ DEPENDENCIES
   jquery-turbolinks
   kaminari
   launchy
+  paper_trail (~> 3.0.1)
   paperclip
   pg
   rails (= 4.1.0)

app/assets/javascripts/rails_admin/custom/ui.js.coffee

@@ -0,0 +1,15 @@
+$(document).on 'rails_admin.dom_ready', ->
+  console.log 'loaded'
+
+  $('.history_approve_contribution').on 'click', (e) ->
+    version_id = $(this).attr('data-id')
+    console.log 'clicked'
+    $.ajax
+      type: "POST"
+      url: "/versions/"
+      data:
+        version_id: version_id
+      dataType: "json"
+      success: (msg) ->
+        alert "Data Saved: " + msg
+        return

app/assets/stylesheets/rails_admin/custom/theming.css.scss

@@ -0,0 +1,4 @@
+#history > tbody > tr > td:nth-child(3){
+  white-space: pre;
+  max-width: none;
+}

app/controllers/cameras_controller.rb

@@ -1,5 +1,6 @@
 class CamerasController < ApplicationController
   before_action :set_camera, only: [:show, :edit, :update, :destroy]
+  after_action :rollback_to_previous_version, only: [:update]
 
   # GET /cameras
   # GET /cameras.json
@@ -92,6 +93,11 @@ def set_camera
     @camera = Camera.find_by_camera_slug(params[:id])
   end
 
+  def rollback_to_previous_version
+    @camera.versions.last.reify.save!
+    flash[:notice] = "Your changes will be reflected once an admin has reviewed them"
+  end
+
   # Never trust parameters from the scary internet, only allow the white list through.
   def camera_params
     params.require(:camera).permit(:model,

app/controllers/versions_controller.rb

@@ -0,0 +1,13 @@
+class VersionsController < ApplicationController
+
+  def change
+    @version = PaperTrail::Version.find(params[:version_id]).next
+    if @version.reify
+      @version.reify.save!
+    else
+      @version.item.destroy
+    end
+    render :inline => "Success"
+  end
+
+end

app/helpers/application_helper.rb

@@ -38,3 +38,4 @@ def avatar_url(user)
     "http://gravatar.com/avatar/#{gravatar_id}.png?s=100"
   end
 end
+

app/models/camera.rb

@@ -3,6 +3,7 @@ class Camera < ActiveRecord::Base
   has_many :documents, as: :owner
   belongs_to :manufacturer
   before_save :make_slug
+  has_paper_trail
 
   accepts_nested_attributes_for :images, allow_destroy: true, reject_if: :all_blank
 

app/models/manufacturer.rb

@@ -1,7 +1,8 @@
 class Manufacturer < ActiveRecord::Base
   has_one  :image, as: :owner
-  has_many :cameras, dependent: :destroy
+  has_many :cameras
   before_save :make_slug
+  has_paper_trail
 
   accepts_nested_attributes_for :image, allow_destroy: true, reject_if: :all_blank
 

app/views/rails_admin/main/history.html.haml

@@ -0,0 +1,54 @@
+- params = request.params.except(:action, :controller, :model_name)
+- query = params[:query]
+- filter = params[:filter]
+- sort = params[:sort]
+- sort_reverse = params[:sort_reverse]
+- path_method = params[:id] ? "history_show_path" : "history_index_path"
+
+= form_tag("", method: "get", class: "search pjax-form form-inline") do
+  .well
+    %input{name: "query", type: "search", value: query, placeholder: "#{t("admin.misc.filter")}", class: 'input-small'}
+    %button.btn.btn-primary{type: "submit", :'data-disable-with' => "<i class='icon-white icon-refresh'></i> ".html_safe + t("admin.misc.refresh")}
+      %i.icon-white.icon-refresh
+      = t("admin.misc.refresh")
+
+%table#history.table.table-striped.table-condensed
+  %thead
+    %tr
+      - columns = []
+      - columns << { property_name: "created_at", css_class: "created_at",link_text: t('admin.table_headers.created_at') }
+      - columns << { property_name: "username",   css_class: "username",  link_text: t('admin.table_headers.username')   }
+      - columns << { property_name: "item",       css_class: "item",      link_text: t('admin.table_headers.item')       } if @general
+      - columns << { property_name: "changes",    css_class: "changes",   link_text: t('admin.table_headers.changes')    }
+      - columns << { property_name: "approve",    css_class: "approve",   link_text: t('admin.table_headers.approve_change') }
+
+      - columns.each do |column|
+        - property_name = column[:property_name]
+        - selected = (sort == property_name)
+        - sort_direction = (sort_reverse ? "headerSortUp" : "headerSortDown" if selected)
+        - sort_location = send(path_method, params.except("sort_reverse").merge(model_name: @abstract_model.to_param, sort: property_name).merge(selected && sort_reverse != "true" ? {sort_reverse: "true"} : {}))
+        %th{class: "header pjax #{column[:css_class]} #{sort_direction if selected}", :'data-href' => sort_location}= column[:link_text]
+  %tbody
+    - @history.each_with_index do |object, index|
+      %tr
+        - unless object.created_at.nil?
+          %td= l(object.created_at, format: :long, default: l(object.created_at, format: :long, locale: :en))
+        %td= object.username
+        - if @general
+          - if o = @abstract_model.get(object.item)
+            - label = o.send(@abstract_model.config.object_label_method)
+            - if show_action = action(:show, @abstract_model, o)
+              %td= link_to(label, url_for(action: show_action.action_name, model_name: @abstract_model.to_param, id: o.id), class: 'pjax')
+            - else
+              %td= label
+          - else
+            %td= "#{@abstract_model.config.label} ##{object.item}"
+        %td= object.changes
+        - if index ==  0
+          %td
+        - else
+          %td= link_to("##{object.id}", "#", :class => 'history_approve_contribution', :'data-id' =>  "#{object.id}")
+
+- unless params[:all] || [email protected]_to?(:current_page)
+  = paginate(@history, theme: 'twitter-bootstrap', remote: true)
+  = link_to(t("admin.misc.show_all"), send(path_method, params.merge(all: true)), class: "show-all btn pjax") unless (tc = @history.total_count) <= @history.size || tc > 100

config/initializers/rails_admin.rb

@@ -1,3 +1,5 @@
+require Rails.root.join('lib', 'rails_admin_approve_change.rb')
+
 RailsAdmin.config do |config|
 
   ### Popular gems integration
@@ -12,7 +14,7 @@
   # config.authorize_with :cancan
 
   ## == PaperTrail ==
-  # config.audit_with :paper_trail, 'User', 'PaperTrail::Version' # PaperTrail >= 3.0.0
+  config.audit_with :paper_trail, 'User', 'PaperTrail::Version' # PaperTrail >= 3.0.0
 
   ### More at https://github.com/sferik/rails_admin/wiki/Base-configuration
 
@@ -28,7 +30,7 @@
     show_in_app
 
     ## With an audit adapter, you can add:
-    # history_index
-    # history_show
+    history_index
+    history_show
   end
 end

config/routes.rb

@@ -9,6 +9,9 @@
   get '/contact-us' => 'pages#contact'
   get '/api-docs' => 'pages#api_docs'
 
+  post '/admin/history', to: 'cameras#history', as: :cameras_history
+  post "/versions", to: "versions#change", :as => "change_version"
+
   devise_for :users
 
   mount RailsAdmin::Engine => '/admin', as: 'rails_admin'

db/migrate/20140512121824_create_versions.rb

@@ -0,0 +1,13 @@
+class CreateVersions < ActiveRecord::Migration
+  def change
+    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
+end

db/migrate/20140512121825_add_object_changes_to_versions.rb

@@ -0,0 +1,5 @@
+class AddObjectChangesToVersions < ActiveRecord::Migration
+  def change
+    add_column :versions, :object_changes, :text
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140507122914) do
+ActiveRecord::Schema.define(version: 20140512121825) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -98,4 +98,16 @@
   add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
   add_index "users", ["username"], name: "index_users_on_username", unique: true, using: :btree
 
+  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"
+    t.text     "object_changes"
+  end
+
+  add_index "versions", ["item_type", "item_id"], name: "index_versions_on_item_type_and_item_id", using: :btree
+
 end

lib/rails_admin_approve_change.rb

@@ -0,0 +1,15 @@
+module RailsAdmin
+  module Extensions
+    module PaperTrail
+      class VersionProxy
+        def id
+          @version.id
+        end
+
+        def changes
+          @changes = @version.changeset.to_a.collect {|c| c[0] + " = " + c[1][1].to_s}.join(", \n")
+        end
+      end
+    end
+  end
+end

public/api-docs/api/v1/cameras.json

@@ -71,4 +71,4 @@
     }
   ],
   "resourcePath": "cameras"
-}
+}