Add achievements table

Author: gedorinku

db/Schemafile

@@ -8,3 +8,5 @@ require 'invitations.schema'
 require 'github_contribution_days.schema'
 require 'email_confirmations.schema'
 require 'password_resets.schema'
+require 'achievements.schema'
+require 'achievement_users.schema'

db/achievement_users.schema

@@ -0,0 +1,10 @@
+create_table :achievement_users, force: :cascade do |t|
+  t.references :achievement, foreign_key: true, null: false
+  t.references :user, foreign_key: true, null: false
+  t.integer :priority, null: false
+
+  t.index [:priority]
+end
+
+add_foreign_key :achievement_users, :achievements
+add_foreign_key :achievement_users, :users

db/achievements.schema

@@ -0,0 +1,11 @@
+create_table :achievements, force: :cascade do |t|
+  t.string :title, null: false
+  t.string :award, null: false
+  t.string :url, null: false
+  t.text :description, null: false
+  t.string :image_filename
+  t.datetime :happened_at, null: false
+  t.timestamps
+
+  t.index [:happened_at]
+end