adds Settings

app/models/setting.rb

@@ -0,0 +1,7 @@
+class Setting < ActiveRecord::Base
+  default_scope { order(key: :desc) }
+
+  def self.value_for(key)
+    where(key: key).pluck(:value).first
+  end
+end

db/migrate/20150817150457_add_settings.rb

@@ -0,0 +1,8 @@
+class AddSettings < ActiveRecord::Migration
+  def change
+    create_table :settings do |t|
+      t.string :key
+      t.string :value
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150815154430) do
+ActiveRecord::Schema.define(version: 20150817150457) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -59,6 +59,11 @@ ActiveRecord::Schema.define(version: 20150815154430) do
 
   add_index "moderators", ["user_id"], name: "index_moderators_on_user_id", using: :btree
 
+  create_table "settings", force: :cascade do |t|
+    t.string "key"
+    t.string "value"
+  end
+
   create_table "simple_captcha_data", force: :cascade do |t|
     t.string   "key",        limit: 40
     t.string   "value",      limit: 6