FEATURE: Two new badges - First Emoji and First Mention

db/migrate/20160405172827_create_user_firsts.rb

@@ -0,0 +1,12 @@
+class CreateUserFirsts < ActiveRecord::Migration
+  def change
+    create_table :user_firsts, force: true do |t|
+      t.integer :user_id, null: false
+      t.integer :first_type, null: false
+      t.integer :post_id
+      t.datetime :created_at, null: false
+    end
+
+    add_index :user_firsts, [:user_id, :first_type], unique: true
+  end
+end