Use Kaminari instead of WillPaginate

This is to avoid any conflict with Kaminari in Administrate. We also add
some specs for pagination in the front end.

app/controllers/categories_controller.rb

@@ -2,7 +2,7 @@ class CategoriesController < ApplicationController
   # GET /categories
   # GET /categories.xml
   def index
-    @categories = Category.order('sort ASC').paginate page: params[:page], per_page: 4
+    @categories = Category.order('sort ASC').page(params[:page]).per(4)
 
     @photos = Photo.featured.limit(2).order('RANDOM()')
 

app/controllers/photos_controller.rb

@@ -28,13 +28,13 @@ class PhotosController < ApplicationController
   def for_category(category_id)
     @category = Category.find_by_id(category_id)
     @photos = @category.photos.enabled.order { taken_at.desc }
-              .paginate(page: params[:page], per_page: 11)
+              .page(params[:page])
     @page_title = @category.name
   end
 
   def all
     @photos = Photo.enabled.order { taken_at.desc }
-              .paginate(page: params[:page], per_page: 11)
+              .page(params[:page])
     @page_title = 'All Photos'
   end
 end

app/views/categories/index.html.erb

@@ -2,12 +2,12 @@
 
 <% content_for :navigation do %>
   <div class="sg-5 page-links">
-    <% if @categories.previous_page -%>
-      <%= link_to content_tag(:div, e(:larr)), { page: @categories.previous_page }, class: 'prev-link' %>
+    <% if !@categories.first_page? -%>
+      <%= link_to content_tag(:div, e(:larr)), { page: @categories.prev_page }, class: 'prev-link' %>
     <% end %>
   </div>
   <div class="sg-5 page-links">
-    <% if @categories.next_page -%>
+    <% if !@categories.last_page? -%>
       <%= link_to content_tag(:div, e(:rarr)), { page: @categories.next_page }, class: 'next-link' %>
     <% end %>
   </div>

app/views/photos/index.html.erb

@@ -2,12 +2,12 @@
 
 <% content_for :navigation do %>
   <div class="sg-5 page-links">
-    <% if @photos.previous_page -%>
-      <%= link_to content_tag(:div, e(:larr)), { page: @photos.previous_page }, class: 'prev-link' %>
+    <% if !@photos.first_page? -%>
+      <%= link_to content_tag(:div, e(:larr)), { page: @photos.prev_page }, class: 'prev-link' %>
     <% end %>
   </div>
   <div class="sg-5 page-links">
-    <% if @photos.next_page -%>
+    <% if !@photos.last_page? -%>
       <%= link_to content_tag(:div, e(:rarr)), { page: @photos.next_page }, class: 'next-link' %>
     <% end %>
   </div>

spec/factories/categories.rb

@@ -2,6 +2,6 @@
 
 FactoryGirl.define do
   factory :category do
-    name 'Test Category'
+    sequence(:name) { |n| "Test Category #{n}" }
   end
 end

spec/features/visitor_navigates_site_spec.rb

@@ -1,19 +1,21 @@
 require 'spec_helper'
 
 feature 'visitor navigates site' do
-  let!(:category) { create(:category) }
-  let!(:photo) { create(:photo, featured: true, categories: [category]) }
-
   it 'shows the featured image on the home page' do
+    category = create(:category)
+    photo = create(:photo, featured: true, categories: [category])
+
     visit root_path
     expect(page).to have_selector("a[data-id='#{photo.id}']")
   end
 
   it 'increments the view counter when an image is displayed', js: true do
+    category = create(:category)
+    photo = create(:photo, featured: true, categories: [category])
+
     visit root_path
 
     selector = "a[data-id='#{photo.id}']"
-    expect(page).to have_selector(selector)
 
     page.find(selector).click
 
@@ -26,14 +28,22 @@ feature 'visitor navigates site' do
   end
 
   it 'shows the categories' do
-    visit root_path
+    categories = create_list(:category, 5)
 
+    visit root_path
     click_link 'portfolio'
 
-    expect(page).to have_link(category.name.downcase)
+    expect(page).to have_link(categories.first.name.downcase)
+
+    click_link '→'
+
+    expect(page).to have_link(categories.last.name.downcase)
   end
 
   it 'shows the photos for the category' do
+    category = create(:category)
+    photo = create(:photo, featured: true, categories: [category])
+
     visit categories_path
 
     click_link category.name.downcase
@@ -41,4 +51,16 @@ feature 'visitor navigates site' do
     selector = "a[data-id='#{photo.id}']"
     expect(page).to have_selector(selector)
   end
+
+  it 'shows the second page of photos' do
+    category = create(:category)
+    photos = create_list(:photo, 12, featured: true, categories: [category])
+
+    visit url_for([category, :photos])
+
+    click_link '→'
+
+    selector = "a[data-id='#{photos.last.id}']"
+    expect(page).to have_selector(selector)
+  end
 end