post_tags, author associations

app/models/post.rb

 class Post < ActiveRecord::Base
+  has_many :post_tags
+  has_many :tags, through: :post_tags
+  belongs_to :author, class_name: 'User'
 end

app/models/post_tag.rb

+class PostTag < ActiveRecord::Base
+  belongs_to :post
+  belongs_to :tag
+end

app/models/tag.rb

 class Tag < ActiveRecord::Base
+  has_many :post_tags
+  has_many :posts, through: :post_tags
 end

app/models/user.rb

-require 'pp'
-
 class User < ActiveRecord::Base
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable and :omniauthable
@@ -7,14 +5,13 @@ class User < ActiveRecord::Base
          :recoverable, :rememberable, :trackable, :validatable
   devise :omniauthable, :omniauth_providers => [:google_oauth2]
 
+  has_many :posts
 
   # Device
   def self.find_for_google_oauth2(access_token, signed_in_resource=nil)
       data = access_token.info
       user = User.where(:email => data["email"]).first
 
-      pp data
-
       unless user
           user = User.create(name: data["name"],
                image_url: data["image"],

app/views/posts/show_fragment.html.erb

 <div class="text-box title"><%= @post.title %></div>
 <div class="text-box meta">
-  <span class="label label-info">#Rails (4.x.x)</span>
-  <span class="label label-info">#ruby</span>
-  <span class="label label-info">#日報</span>
-  <span class="label label-success">@tady</span>
+  <% @post.tags.each do |tag| %>
+    <span class="label label-info">#<%= tag.name %></span>
+  <% end %>
+  <span class="label label-success">@<%= @post.author.name %></span>
   <span class="label label-danger"><%= @post.updated_at.strftime('%Y-%m-%d') %></span>
 </div>
 <div class="text-box body"><%= h_application_format_markdown(@post.body) %></div>

db/migrate/20131130112531_create_posts.rb

@@ -3,6 +3,7 @@ class CreatePosts < ActiveRecord::Migration
     create_table :posts do |t|
       t.string :title
       t.text :body
+      t.integer :author_id
 
       t.timestamps
     end

db/migrate/20131130184007_create_post_tag.rb

+class CreatePostTag < ActiveRecord::Migration
+  def change
+    create_table :post_tags do |t|
+      t.integer :post_id, null: false
+      t.integer :tag_id, null: false
+
+      t.timestamps
+    end
+
+    add_index :post_tags, :post_id
+    add_index :post_tags, :tag_id
+  end
+end

db/schema.rb

@@ -11,11 +11,22 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20131130112531) do
+ActiveRecord::Schema.define(version: 20131130184007) do
+
+  create_table "post_tags", force: true do |t|
+    t.integer  "post_id",    null: false
+    t.integer  "tag_id",     null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "post_tags", ["post_id"], name: "index_post_tags_on_post_id"
+  add_index "post_tags", ["tag_id"], name: "index_post_tags_on_tag_id"
 
   create_table "posts", force: true do |t|
     t.string   "title"
     t.text     "body"
+    t.integer  "author_id"
     t.datetime "created_at"
     t.datetime "updated_at"
   end

db/seeds.rb

@@ -7,17 +7,34 @@
 #   Mayor.create(name: 'Emanuel', city: cities.first)
 
 
+# Tag
+tags = []
 %w(JavaScript HTML CSS iPhone PHP Ruby Android Qiita Java Objective-C Vim Python ShellScript C++ C CoffeeScript Emacs git Perl jQuery
   ).each do |tag|
     puts "[Seed Tag] #{tag}"
-  Tag.find_or_create_by(name: tag)
+    tags << Tag.find_or_create_by(name: tag)
 end
 
+# User
+user = User.find_or_initialize_by(name: '山田太郎')
+user.update_attributes!(email: "#{Devise.friendly_token[0,20]}@example.com", password: Devise.friendly_token[0,20])
 
+user = User.find_or_initialize_by(name: '鈴木二郎')
+user.update_attributes!(email: "#{Devise.friendly_token[0,20]}@example.com", password: Devise.friendly_token[0,20])
+
+user = User.find_or_initialize_by(name: '田中三郎')
+user.update_attributes!(email: "#{Devise.friendly_token[0,20]}@example.com", password: Devise.friendly_token[0,20])
+
+# Post
+users = User.all
 Dir.glob(Rails.root.join('db', 'seeds').to_s + '/*').each do |file_name|
   puts "[Post Tag] #{file_name}"
   title = file_name.split('/').last
-  Post.find_or_create_by(title: title) do |post|
+
+  post = Post.find_or_initialize_by(title: title)
   post.body = File.read(file_name)
-  end
+  post.author = users.sample
+  post.tags = [tags.sample, tags.sample]
+  post.save!
 end
+