fix conflt of changelog

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog Fab Manager
 
+
+- add json cache for machines, events, trainings
+- optimise sql query, avoid to N+1
+
 ## v2.2.1 2016 June 22
 - Fix a bug: field User.merged_at should not be allowed to be mapped in SSO
 - Fix a bug: integration test "user reservation without plan"
@@ -36,4 +40,4 @@
 - Fix a bug: custom asset favicon-file favicon file is not set
 - Fix a security issue: stripe card token is now checked on server side on new/renew subscription
 - Translated notification e-mails into english language
-- Subscription extension logic has been extracted into a microservice
+- Subscription extension logic has been extracted into a microservice

Gemfile

@@ -16,7 +16,8 @@ gem 'therubyracer', '= 0.12.0', platforms: :ruby
 # Use jquery as the JavaScript library
 gem 'jquery-rails'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
-gem 'jbuilder', '~> 2.0'
+gem 'jbuilder', '~> 2.5'
+gem 'jbuilder_cache_multi'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0', group: :doc #TODO remove unused ?
 

Gemfile.lock

@@ -179,9 +179,11 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (0.7.0)
     ice_nine (0.11.1)
-    jbuilder (2.2.12)
-      activesupport (>= 3.0.0, < 5)
+    jbuilder (2.5.0)
+      activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
+    jbuilder_cache_multi (0.0.3)
+      jbuilder (>= 1.5.0, < 3)
     jquery-rails (4.0.3)
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)
@@ -208,13 +210,13 @@ GEM
     mime-types (2.99)
     mini_magick (4.2.0)
     mini_portile2 (2.0.0)
-    minitest (5.8.4)
+    minitest (5.9.0)
     minitest-reporters (1.1.8)
       ansi
       builder
       minitest (>= 5.0)
       ruby-progressbar
-    multi_json (1.11.2)
+    multi_json (1.12.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
     naught (1.0.0)
@@ -452,7 +454,8 @@ DEPENDENCIES
   foreman
   forgery
   friendly_id (~> 5.1.0)
-  jbuilder (~> 2.0)
+  jbuilder (~> 2.5)
+  jbuilder_cache_multi
   jquery-rails
   kaminari
   letter_opener
@@ -497,4 +500,4 @@ DEPENDENCIES
   webmock
 
 BUNDLED WITH
-   1.11.2
+   1.12.5

app/assets/javascripts/controllers/admin/plans.coffee.erb

@@ -175,8 +175,8 @@ Application.Controllers.controller 'NewPlanController', ['$scope', '$uibModal',
 ##
 # Controller used in the plan edition form
 ##
-Application.Controllers.controller 'EditPlanController', ['$scope', 'groups', 'plans', 'planPromise', 'machines', 'prices', 'partners', 'CSRF', '$state', '$stateParams', 'growl', '$filter', '_t', '$locale'
-, ($scope, groups, plans, planPromise, machines, prices, partners, CSRF, $state, $stateParams, growl, $filter, _t, $locale) ->
+Application.Controllers.controller 'EditPlanController', ['$scope', 'groups', 'plans', 'planPromise', 'machines', 'prices', 'partners', 'CSRF', '$state', '$stateParams', 'growl', '$filter', '_t', '$locale', 'Plan'
+, ($scope, groups, plans, planPromise, machines, prices, partners, CSRF, $state, $stateParams, growl, $filter, _t, $locale, Plan) ->
 
 
 
@@ -207,12 +207,13 @@ Application.Controllers.controller 'EditPlanController', ['$scope', 'groups', 'p
   ##
   $scope.copyPricesFromPlan = ->
     if $scope.plan.parent
-      parentPlan = $scope.getPlanFromId($scope.plan.parent)
-      for parentPrice in parentPlan.prices
-        for childKey, childPrice of $scope.plan.prices
-          if childPrice.priceable_type == parentPrice.priceable_type and childPrice.priceable_id == parentPrice.priceable_id
-            $scope.plan.prices[childKey].amount = parentPrice.amount
-            break
+      Plan.get {id: $scope.plan.parent}, (parentPlan) ->
+        for parentPrice in parentPlan.prices
+          for childKey, childPrice of $scope.plan.prices
+            if childPrice.priceable_type == parentPrice.priceable_type and childPrice.priceable_id == parentPrice.priceable_id
+              $scope.plan.prices[childKey].amount = parentPrice.amount
+              break
+
     # if no plan were selected, unset every prices
     else
       for key, price of $scope.plan.prices
@@ -257,4 +258,4 @@ Application.Controllers.controller 'EditPlanController', ['$scope', 'groups', 'p
 
   ## !!! MUST BE CALLED AT THE END of the controller
   initialize()
-]
+]

app/assets/javascripts/controllers/admin/pricing.coffee.erb

@@ -8,7 +8,7 @@ Application.Controllers.controller "EditPricingController", ["$scope", "$state",
 
   ### PUBLIC SCOPE ###
   ## List of machines prices (not considering any plan)
-  $scope.machinesPrices = machinesPricesPromise.prices
+  $scope.machinesPrices = machinesPricesPromise
 
   ## List of trainings pricing
   $scope.trainingsPricings = trainingsPricingsPromise

app/assets/javascripts/router.coffee.erb

@@ -330,7 +330,7 @@ angular.module('application.router', ['ui.router']).
             controller: 'ReserveMachineController'
         resolve:
           plansPromise: ['Plan', (Plan)->
-            Plan.query(attributes_requested: "['machines_credits']").$promise
+            Plan.query().$promise
           ]
           groupsPromise: ['Group', (Group)->
             Group.query().$promise
@@ -375,7 +375,7 @@ angular.module('application.router', ['ui.router']).
             Setting.get(name: 'training_explications_alert').$promise
           ]
           plansPromise: ['Plan', (Plan)->
-            Plan.query(attributes_requested: "['trainings_credits']").$promise
+            Plan.query().$promise
           ]
           groupsPromise: ['Group', (Group)->
             Group.query().$promise
@@ -423,7 +423,7 @@ angular.module('application.router', ['ui.router']).
             Setting.get(name: 'subscription_explications_alert').$promise
           ]
           plansPromise: ['Plan', (Plan)->
-            Plan.query(shallow: true).$promise
+            Plan.query().$promise
           ]
           groupsPromise: ['Group', (Group)->
             Group.query().$promise

app/assets/javascripts/services/price.coffee

@@ -4,7 +4,7 @@ Application.Services.factory 'Price', ["$resource", ($resource)->
   $resource "/api/prices/:id",
     {},
     query:
-      isArray: false
+      isArray: true
     update:
       method: 'PUT'
     compute:

app/controllers/api/admins_controller.rb

@@ -3,7 +3,7 @@ class API::AdminsController < API::ApiController
 
   def index
     authorize :admin
-    @admins = User.admins
+    @admins = User.includes(profile: [:user_avatar]).admins
   end
 
   def create

app/controllers/api/availabilities_controller.rb

@@ -49,21 +49,22 @@ class API::AvailabilitiesController < API::ApiController
     else
       @user = current_user
     end
+    @current_user_role = current_user.is_admin? ? 'admin' : 'user'
     @machine = Machine.find(params[:machine_id])
     @slots = []
-    @reservations = Reservation.where('reservable_type = ? and reservable_id = ?', @machine.class.to_s, @machine.id).joins(:slots).where('slots.start_at > ?', Time.now)
+    @reservations = Reservation.where('reservable_type = ? and reservable_id = ?', @machine.class.to_s, @machine.id).includes(:slots, user: [:profile]).references(:slots, :user).where('slots.start_at > ?', Time.now)
     if @user.is_admin?
-      @availabilities = @machine.availabilities.where("end_at > ? AND available_type = 'machines'", Time.now)
+      @availabilities = @machine.availabilities.includes(:tags).where("end_at > ? AND available_type = 'machines'", Time.now)
     else
       end_at = 1.month.since
       end_at = 3.months.since if is_subscription_year(@user)
-      @availabilities = @machine.availabilities.includes(:availability_tags).where("end_at > ? AND end_at < ? AND available_type = 'machines'", Time.now, end_at).where('availability_tags.tag_id' => @user.tag_ids.concat([nil]))
+      @availabilities = @machine.availabilities.includes(:tags).where("end_at > ? AND end_at < ? AND available_type = 'machines'", Time.now, end_at).where('availability_tags.tag_id' => @user.tag_ids.concat([nil]))
     end
     @availabilities.each do |a|
       ((a.end_at - a.start_at)/SLOT_DURATION.minutes).to_i.times do |i|
         if (a.start_at + (i * SLOT_DURATION).minutes) > Time.now
-          slot = Slot.new(start_at: a.start_at + (i*SLOT_DURATION).minutes, end_at: a.start_at + (i*SLOT_DURATION).minutes + SLOT_DURATION.minutes, availability_id: a.id, machine: @machine, title: '')
-          slot = verify_machine_is_reserved(slot, @reservations)
+          slot = Slot.new(start_at: a.start_at + (i*SLOT_DURATION).minutes, end_at: a.start_at + (i*SLOT_DURATION).minutes + SLOT_DURATION.minutes, availability_id: a.id, availability: a, machine: @machine, title: '')
+          slot = verify_machine_is_reserved(slot, @reservations, current_user, @current_user_role)
           @slots << slot
         end
       end
@@ -77,13 +78,13 @@ class API::AvailabilitiesController < API::ApiController
       @user = current_user
     end
     @slots = []
-    @reservations = @user.reservations.where("reservable_type = 'Training'").joins(:slots).where('slots.start_at > ?', Time.now)
+    @reservations = @user.reservations.includes(:slots).references(:slots).where("reservable_type = 'Training' AND slots.start_at > ?", Time.now)
     if @user.is_admin?
-      @availabilities = Availability.trainings.where('start_at > ?', Time.now)
+      @availabilities = Availability.includes(:tags, :slots, trainings: [:machines]).trainings.where('availabilities.start_at > ?', Time.now)
     else
       end_at = 1.month.since
       end_at = 3.months.since if can_show_slot_plus_three_months(@user)
-      @availabilities = Availability.trainings.includes(:availability_tags).where('start_at > ? AND start_at < ?', Time.now, end_at).where('availability_tags.tag_id' => @user.tag_ids.concat([nil]))
+      @availabilities = Availability.includes(:tags, :slots, trainings: [:machines]).trainings.where('start_at > ? AND start_at < ?', Time.now, end_at).where('availability_tags.tag_id' => @user.tag_ids.concat([nil]))
     end
     @availabilities.each do |a|
       a = verify_training_is_reserved(a, @reservations)
@@ -115,15 +116,14 @@ class API::AvailabilitiesController < API::ApiController
       is_reserved
     end
 
-    def verify_machine_is_reserved(slot, reservations)
-      user = current_user
+    def verify_machine_is_reserved(slot, reservations, user, user_role)
       reservations.each do |r|
         r.slots.each do |s|
           if s.start_at == slot.start_at and s.canceled_at == nil
             slot.id = s.id
             slot.is_reserved = true
             slot.title = t('availabilities.not_available')
-            slot.can_modify = true if user.is_admin?
+            slot.can_modify = true if user_role === 'admin'
             slot.reservation = r
           end
           if s.start_at == slot.start_at and r.user == user and s.canceled_at == nil

app/controllers/api/events_controller.rb

@@ -4,13 +4,14 @@ class API::EventsController < API::ApiController
   def index
     @events = policy_scope(Event)
     @total = @events.count
-    @events = @events.page(params[:page]).per(12)
+    @page = params[:page]
+    @events = @events.page(@page).per(12)
   end
 
   # GET /events/upcoming/:limit
   def upcoming
     limit = params[:limit]
-    @events = Event.includes(:event_image, :event_files, :availability)
+    @events = Event.includes(:event_image, :event_files, :availability, :categories)
                    .where('availabilities.start_at >= ?', Time.now)
                    .order('availabilities.start_at ASC').references(:availabilities).limit(limit)
   end

app/controllers/api/members_controller.rb

@@ -13,7 +13,7 @@ class API::MembersController < API::ApiController
   end
 
   def last_subscribed
-    @members = User.active.with_role(:member).includes(:profile).where('is_allow_contact = true AND confirmed_at IS NOT NULL').order('created_at desc').limit(params[:last])
+    @members = User.active.with_role(:member).includes(profile: [:user_avatar]).where('is_allow_contact = true AND confirmed_at IS NOT NULL').order('created_at desc').limit(params[:last])
     @requested_attributes = ['profile']
     render :index
   end
@@ -169,7 +169,7 @@ class API::MembersController < API::ApiController
         order_key = 'users.id'
     end
 
-    @members = User.includes(:profile, :group)
+    @members = User.includes(:profile, :group, :subscriptions)
                .joins(:profile, :group, :roles, 'LEFT JOIN "subscriptions" ON "subscriptions"."user_id" = "users"."id"  LEFT JOIN "plans" ON "plans"."id" = "subscriptions"."plan_id"')
                .where("users.is_active = 'true' AND roles.name = 'member'")
                .order("#{order_key} #{direction}")

app/controllers/api/plans_controller.rb

@@ -2,14 +2,9 @@
   before_action :authenticate_user!, except: [:index]
 
   def index
-    @attributes_requested = params[:attributes_requested]
-    @plans = Plan.all
+    @plans = Plan.includes(:plan_file)
     @plans = @plans.where(group_id: params[:group_id]) if params[:group_id]
-    if params[:shallow]
-      render :shallow_index
-    else
-      render :index
-    end
+    render :index
   end
 
   def show

app/controllers/api/trainings_pricings_controller.rb

@@ -2,7 +2,7 @@ class API::TrainingsPricingsController < API::ApiController
   before_action :authenticate_user!
 
   def index
-    @trainings_pricings = TrainingsPricing.includes(:training)
+    @trainings_pricings = TrainingsPricing.all
   end
 
   def update

app/models/availability.rb

@@ -16,7 +16,7 @@ class Availability < ActiveRecord::Base
   accepts_nested_attributes_for :tags, allow_destroy: true
 
   scope :machines, -> { where(available_type: 'machines') }
-  scope :trainings, -> { where(available_type: 'training') }
+  scope :trainings, -> { includes(:trainings).where(available_type: 'training') }
 
   attr_accessor :is_reserved, :slot_id, :can_modify
 
@@ -51,9 +51,10 @@ class Availability < ActiveRecord::Base
   # if haven't defined a nb_total_places, places are unlimited
   def is_completed
     return false if nb_total_places.blank?
-    nb_total_places <= slots.where(canceled_at: nil).size
+    nb_total_places <= slots.to_a.select {|s| s.canceled_at == nil }.size
   end
 
+  # TODO: refactoring this function for avoid N+1 query
   def nb_total_places
     if read_attribute(:nb_total_places).present?
       read_attribute(:nb_total_places)

app/models/event.rb

@@ -15,6 +15,8 @@ class Event < ActiveRecord::Base
 
   after_create :event_recurrence
   before_save :update_nb_free_places
+  # update event updated_at for index cache
+  after_save -> { self.touch }
 
   def name
     title

app/policies/event_policy.rb

@@ -2,12 +2,12 @@ class EventPolicy < ApplicationPolicy
   class Scope < Scope
     def resolve
       if user.nil? or (user and !user.is_admin?)
-        scope.includes(:event_image, :event_files, :availability)
+        scope.includes(:event_image, :event_files, :availability, :categories)
              .where('availabilities.start_at >= ?', Time.now)
              .order('availabilities.start_at ASC')
              .references(:availabilities)
       else
-        scope.includes(:event_image, :event_files, :availability)
+        scope.includes(:event_image, :event_files, :availability, :categories)
              .order('availabilities.start_at DESC')
              .references(:availabilities)
       end

app/views/api/availabilities/machine.json.jbuilder

@@ -17,7 +17,7 @@ json.array!(@slots) do |slot|
   json.user do
     json.id slot.reservation.user.id
     json.name slot.reservation.user.profile.full_name
-  end if slot.reservation # ... if the slot was reserved
+  end if @current_user_role == 'admin' and slot.reservation # ... if the slot was reserved
   json.tag_ids slot.availability.tag_ids
   json.tags slot.availability.tags do |t|
     json.id t.id

app/views/api/availabilities/trainings.json.jbuilder

@@ -2,26 +2,21 @@ json.array!(@availabilities) do |a|
   json.id a.id
   json.slot_id a.slot_id if a.slot_id
   if a.is_reserved
+    json.is_reserved true
     json.title "#{a.trainings[0].name}' - #{t('trainings.i_ve_reserved')}"
+    json.borderColor '#b2e774'
   elsif a.is_completed
+    json.is_completed true
     json.title "#{a.trainings[0].name} - #{t('trainings.completed')}"
+    json.borderColor '#eeeeee'
   else
     json.title a.trainings[0].name
+    json.borderColor '#bd7ae9'
   end
   json.start a.start_at.iso8601
   json.end a.end_at.iso8601
-  json.is_reserved a.is_reserved
   json.backgroundColor 'white'
-  json.borderColor a.is_reserved ? '#b2e774' : '#bd7ae9'
-  if a.is_reserved
-    json.borderColor '#b2e774'
-  elsif a.is_completed
-    json.borderColor '#eeeeee'
-  else
-    json.borderColor '#bd7ae9'
-  end
   json.can_modify a.can_modify
-  json.is_completed a.is_completed
   json.nb_total_places a.nb_total_places
 
   json.training do
@@ -32,7 +27,6 @@ json.array!(@availabilities) do |a|
       json.id m.id
       json.name m.name
     end
-    json.amount a.trainings.first.amount_by_group(@user.group_id).amount_by_plan(nil)/100.0 if @user
   end
   json.tag_ids a.tag_ids
   json.tags a.tags do |t|

app/views/api/events/index.json.jbuilder

@@ -1,7 +1,8 @@
-json.array!(@events) do |event|
-  json.partial! 'api/events/event', event: event
-  json.event_image_small event.event_image.attachment.small.url if event.event_image
-  json.url event_url(event, format: :json)
-  json.nb_total_events @total
+json.cache! [@events, @page] do
+  json.array!(@events) do |event|
+    json.partial! 'api/events/event', event: event
+    json.event_image_small event.event_image.attachment.small.url if event.event_image
+    json.url event_url(event, format: :json)
+    json.nb_total_events @total
+  end
 end
-

app/views/api/events/upcoming.json.jbuilder

@@ -1,6 +1,7 @@
-json.array!(@events) do |event|
-  json.partial! 'api/events/event', event: event
-  json.event_image_medium event.event_image.attachment.medium.url if event.event_image
-  json.url event_url(event, format: :json)
+json.cache! @events do
+  json.array!(@events) do |event|
+    json.partial! 'api/events/event', event: event
+    json.event_image_medium event.event_image.attachment.medium.url if event.event_image
+    json.url event_url(event, format: :json)
+  end
 end
-

app/views/api/groups/index.json.jbuilder

@@ -1 +1,3 @@
-json.partial! 'api/groups/group', collection: @groups, as: :group
+json.cache! @groups do
+  json.partial! 'api/groups/group', collection: @groups, as: :group
+end

app/views/api/machines/index.json.jbuilder

@@ -1,13 +1,7 @@
-user_is_admin = (current_user and current_user.is_admin?)
-
-json.array!(@machines) do |machine|
-  json.extract! machine, :id, :name, :description, :spec, :slug
-  json.url machine_url(machine, format: :json)
-  json.machine_image machine.machine_image.attachment.medium.url if machine.machine_image
-  json.current_user_is_training current_user.is_training_machine?(machine) if current_user
-  json.current_user_training_reservation do
-    json.partial! 'api/reservations/reservation', reservation: current_user.training_reservation_by_machine(machine)
-  end if current_user and !current_user.is_training_machine?(machine) and current_user.training_reservation_by_machine(machine)
-
-  json.plan_ids machine.plan_ids if user_is_admin
+json.cache! @machines do
+  json.array!(@machines) do |machine|
+    json.extract! machine, :id, :name, :description, :spec, :slug
+    json.url machine_url(machine, format: :json)
+    json.machine_image machine.machine_image.attachment.medium.url if machine.machine_image
+  end
 end

app/views/api/machines/show.json.jbuilder

@@ -11,16 +11,6 @@ json.current_user_training_reservation do
   json.partial! 'api/reservations/reservation', reservation: current_user.training_reservation_by_machine(@machine)
 end if current_user and !current_user.is_training_machine?(@machine) and current_user.training_reservation_by_machine(@machine)
 
-json.amount_by_group Group.all do |g|
-  json.id g.id
-  json.name g.name
-  json.not_subscribe_amount @machine.not_subscribe_price(g.id).amount/100.0
-
-  json.amount_by_plan @machine.prices_by_group(g.id) do |price|
-    json.plan_id price.plan_id
-    json.amount price.amount/100.0
-  end
-end
 json.machine_projects @machine.projects.published.last(10) do |p|
   json.id p.id
   json.name p.name

app/views/api/plans/_plan.json.jbuilder

@@ -6,23 +6,8 @@ json.plan_file_attributes do
   json.attachment_identifier plan.plan_file.attachment_identifier
 end if plan.plan_file
 
-json.prices plan.prices do |price|
-  json.extract! price, :id, :group_id, :plan_id, :priceable_type, :priceable_id
-  json.amount price.amount / 100.0
-  json.priceable_name price.priceable.name
-end
-
 json.partners plan.partners do |partner|
   json.first_name partner.first_name
   json.last_name partner.last_name
   json.email partner.email
 end if plan.respond_to?(:partners)
-
-json.training_credits plan.training_credits do |tc|
-  json.training_id tc.creditable_id
-end if attribute_requested?(@attributes_requested, 'trainings_credits')
-
-json.machine_credits plan.machine_credits do |mc|
-  json.machine_id mc.creditable_id
-  json.hours mc.hours
-end if attribute_requested?(@attributes_requested, 'machines_credits')

app/views/api/plans/index.json.jbuilder

@@ -1 +1,5 @@
-json.partial! 'api/plans/plan', collection: @plans, as: :plan
+json.array!(@plans) do |plan|
+  json.extract! plan, :id, :base_name, :name, :interval, :interval_count, :group_id, :training_credit_nb, :description, :type, :ui_weight
+  json.amount (plan.amount / 100.00)
+  json.plan_file_url plan.plan_file.attachment_url if plan.plan_file
+end

app/views/api/prices/index.json.jbuilder

@@ -1 +1,3 @@
-json.prices @prices, partial: 'api/prices/price', as: :price
+json.cache! @prices do
+  json.partial! 'api/prices/price', collection: @prices, as: :price
+end

app/views/api/trainings/index.json.jbuilder

@@ -1,19 +1,13 @@
-json.array!(@trainings) do |training|
-  json.id training.id
-  json.name training.name
-  json.description training.description
-  json.machine_ids training.machine_ids
-  json.availabilities training.availabilities do |a|
-    json.id a.id
-    json.start_at a.start_at.iso8601
-    json.end_at a.end_at.iso8601
-    json.reservation_users a.slots.map do |slot|
-      json.id slot.reservation.user.id
-      json.full_name slot.reservation.user.profile.full_name
-      json.is_valid slot.reservation.user.trainings.include?(training)
-    end
-  end if attribute_requested?(@requested_attributes, 'availabilities')
-  json.nb_total_places training.nb_total_places
+role = (current_user and current_user.is_admin?) ? 'admin' : 'user'
 
-  json.plan_ids training.plan_ids if current_user and current_user.is_admin?
+json.cache! [@trainings, role] do
+  json.array!(@trainings) do |training|
+    json.id training.id
+    json.name training.name
+    json.description training.description
+    json.machine_ids training.machine_ids
+    json.nb_total_places training.nb_total_places
+
+    json.plan_ids training.plan_ids if role === 'admin'
+  end
 end

app/views/api/trainings/show.json.jbuilder

@@ -1,5 +1,5 @@
 json.extract! @training, :id, :name, :machine_ids, :nb_total_places
-json.availabilities @training.availabilities.order('start_at DESC') do |a|
+json.availabilities @training.availabilities do |a|
   json.id a.id
   json.start_at a.start_at.iso8601
   json.end_at a.end_at.iso8601

app/views/api/trainings_pricings/_trainings_pricing.json.jbuilder

@@ -1,5 +1,2 @@
 json.extract! trainings_pricing, :id, :group_id, :training_id
 json.amount trainings_pricing.amount / 100.0
-json.training do
-  json.name trainings_pricing.training.name
-end

config/environments/development.rb

@@ -11,7 +11,7 @@ Rails.application.configure do
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
-  config.action_controller.perform_caching = false
+  config.action_controller.perform_caching = true
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false