Introduced link posts

app/models/post.rb

@@ -2,20 +2,22 @@
 #
 # Table name: posts
 #
-#  id         :integer         not null, primary key
-#  title      :string(255)
-#  body       :text
-#  created_at :datetime
-#  updated_at :datetime
-#  user_id    :integer
-#  draft      :integer
-#  post_type  :string(255)
-#  image      :string(255)
-#  quote      :string(255)
+#  id           :integer         not null, primary key
+#  title        :string(255)
+#  body         :text
+#  created_at   :datetime
+#  updated_at   :datetime
+#  user_id      :integer
+#  draft        :integer
+#  post_type    :string(255)
+#  image        :string(255)
+#  quote        :string(255)
+#  quote_source :string(255)
+#  link         :text
 #
 
 class Post < ActiveRecord::Base
-  attr_accessible :title, :body, :user_id, :draft, :post_type, :quote, :image, :quote_source
+  attr_accessible :title, :body, :user_id, :draft, :post_type, :quote, :image, :quote_source, :link
 
   belongs_to :user
 
@@ -36,6 +38,10 @@ class Post < ActiveRecord::Base
               :length => { :within => 1..255 }
   end
 
+  with_options :if => :link_post_type? do |post|
+    post.validates :link, :presence => true
+  end
+
   validates :user_id, :presence => true,
                       :numericality => {
                                          :only_integer => true,
@@ -101,4 +107,8 @@ def image_post_type?
   def quote_post_type?
     post_type == "quote"
   end
+
+  def link_post_type?
+    post_type == "link"
+  end
 end

db/migrate/20110921114256_add_link_to_posts.rb

@@ -0,0 +1,5 @@
+class AddLinkToPosts < ActiveRecord::Migration
+  def change
+    add_column :posts, :link, :text
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20110921111653) do
+ActiveRecord::Schema.define(:version => 20110921114256) do
 
   create_table "posts", :force => true do |t|
     t.string   "title"
@@ -24,6 +24,7 @@
     t.string   "image"
     t.string   "quote"
     t.string   "quote_source"
+    t.text     "link"
   end
 
   create_table "users", :force => true do |t|

spec/models/post_spec.rb

@@ -25,7 +25,8 @@
       :user_id => 1,
       :draft => 0,
       :post_type => "text",
-      :quote => "Aziz, Light!"
+      :quote => "Aziz, Light!",
+      :link => "http://www.example.com/"
     }
   end
 
@@ -88,6 +89,7 @@
         post.should_not be_valid
       end
 
+      # FIXME: Split that test
       it "should require a valid post type" do
         valid_post_types = %w[text quote link audio video]
         valid_post_types.each do |valid_post_type|
@@ -115,5 +117,17 @@
         post.should_not be_valid
       end
     end
+
+    describe "link" do
+      it "should require a link for posts of type link" do
+        post = Post.new(@attr.merge(:link => "", :post_type => "link"))
+        post.should_not be_valid
+      end
+
+      it "should not require a link for posts of type other than link" do
+        post = Post.new(@attr.merge(:link => "", :post_type => "text"))
+        post.should be_valid
+      end
+    end
   end
 end