Added pagination.

Gemfile

@@ -10,6 +10,13 @@ gemspec
 # Git. Remember to move these dependencies to your gemspec before releasing
 # your gem to rubygems.org.
 
+gem 'kaminari'
+
+group :test do
+  gem "capybara", "~> 2.2.0"
+  gem 'kaminari-rspec'
+end
+
 # To use debugger
 gem 'byebug'
 gem 'pry'

app/controllers/blog_posts_controller.rb

@@ -4,7 +4,7 @@ class BlogPostsController < ApplicationController
   before_filter :find_blog_post!, :only => :show
 
   def index
-    @blog_posts = BlogPost.all
+    @blog_posts = BlogPost.page(params[:page])
   end
 
   def filter

app/views/admin/blog_posts/index.html.erb

@@ -45,6 +45,7 @@
             </tr>
           <% end %>
         </table>
+        <%= paginate(@blog_posts) %>
       <% else %>
         <p class="simple-blog-posts-missing"><%= t('.no_published_posts') %></p>
       <% end %>

app/views/blog_posts/index.html.erb

@@ -14,6 +14,7 @@
         <% end %>
       </div>
     <% end %>
+    <%= paginate(@blog_posts) %>
   <% else %>
     <p class="simple-blog-posts-missing"><%= t('.no_published_posts') %></p>
   <% end %>

config/initializers/kaminari_config.rb

@@ -0,0 +1,10 @@
+Kaminari.configure do |config|
+  config.default_per_page = 10
+  config.max_per_page = nil
+  config.window = 4
+  config.outer_window = 0
+  config.left = 0
+  config.right = 0
+  config.page_method_name = :page
+  config.param_name = :page
+end

config/routes.rb

@@ -6,6 +6,7 @@
   namespace :admin do
     resources :blog_posts do
       get "/get_tags" => "blog_posts#get_tags", as: :get_tags, on: :collection
+      get '/blog/:page', action: :index, on: :collection
     end
     resources :blog_images
   end

spec/controllers/admin/blog_posts_controller_spec.rb

@@ -174,6 +174,7 @@ module Admin
         get :index
         expect(assigns(:blog_posts)).to eq([blog_post])
       end
+
     end
 
     describe "#destroy" do

spec/controllers/blog_posts_controller_spec.rb

@@ -22,6 +22,7 @@
       get :index
       expect(response).to render_template('blog_posts/index')
     end
+
   end
 
   describe "#filter" do

spec/dummy/db/schema.rb

@@ -13,12 +13,12 @@
 
 ActiveRecord::Schema.define(version: 20150115103932) do
 
-  create_table "blog_images", force: true do |t|
+  create_table "blog_images", force: :cascade do |t|
     t.integer "blog_post_id"
     t.string  "image"
   end
 
-  create_table "blog_posts", force: true do |t|
+  create_table "blog_posts", force: :cascade do |t|
     t.string   "title"
     t.text     "body"
     t.text     "description"
@@ -30,7 +30,7 @@
     t.string   "language"
   end
 
-  create_table "taggings", force: true do |t|
+  create_table "taggings", force: :cascade do |t|
     t.integer  "tag_id"
     t.integer  "taggable_id"
     t.string   "taggable_type"
@@ -43,7 +43,7 @@
   add_index "taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
   add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
 
-  create_table "tags", force: true do |t|
+  create_table "tags", force: :cascade do |t|
     t.string  "name"
     t.integer "taggings_count", default: 0
   end

spec/features/paginate_posts_index_spec.rb

@@ -0,0 +1,14 @@
+require 'spec_helper'
+
+describe 'Paginate posts index' do
+  describe 'index is paginated' do
+    before do
+      POSTS_PER_PAGE = 25
+      POSTS_PER_PAGE.times { create(:blog_post) }
+      visit blog_posts_path
+    end
+      it "limits the number of posts to #{BlogPost::POSTS_PER_PAGE}" do
+        expect(page).to have_selector('.blog-post', count: BlogPost::POSTS_PER_PAGE)
+      end
+  end
+end