Adding an app settings table and constract to attempt to move these t…

…hings out of config files.

Gemfile

@@ -57,6 +57,7 @@ gem 'aws-sdk'
 gem 'garb'
 gem 'oauth'
 gem 'rails_config'
+gem 'activerecord-postgres-hstore'
 
 # To use ActiveModel has_secure_password
 gem 'bcrypt-ruby', '~> 3.0.0'

Gemfile.lock

@@ -56,6 +56,10 @@ GEM
       activesupport (= 3.2.12)
       arel (~> 3.0.2)
       tzinfo (~> 0.3.29)
+    activerecord-postgres-hstore (0.7.6)
+      activerecord (>= 3.1)
+      pg-hstore (>= 1.1.5)
+      rake
     activeresource (3.2.12)
       activemodel (= 3.2.12)
       activesupport (= 3.2.12)
@@ -197,6 +201,7 @@ GEM
     nokogiri (1.5.6)
     oauth (0.4.7)
     pg (0.14.1)
+    pg-hstore (1.2.0)
     polyglot (0.3.3)
     premailer (1.7.3)
       css_parser (>= 1.1.9)
@@ -356,6 +361,7 @@ PLATFORMS
 
 DEPENDENCIES
   active_attr
+  activerecord-postgres-hstore
   airbrake
   anjlab-bootstrap-rails (>= 2.2)
   aws-sdk

app/models/app_settings.rb

@@ -0,0 +1,32 @@
+class AppSettings < ActiveRecord::Base
+  serialize :data, ActiveRecord::Coders::Hstore
+  self.table_name = "settings"
+
+  class << self
+
+    def instance
+      @instance ||= ( self.first || self.create )
+    end
+
+    def create_with_instance_checking(*args)
+      if self.first.nil?
+        create_without_instance_checking(*args)
+      else
+        raise "Can't create a new instance."
+      end
+    end
+
+    alias_method_chain :create, :instance_checking
+
+    def [](key)
+      self.instance.data[key]
+    end
+
+    def []=(key, value)
+      self.instance.data[key] = value
+      self.instance.save
+      value
+    end
+
+  end
+end

db/migrate/20130807232909_add_hstore_settings_to_app.rb

@@ -0,0 +1,8 @@
+class AddHstoreSettingsToApp < ActiveRecord::Migration
+  def change
+    create_table :settings do |t|
+      t.hstore :data
+      t.timestamps
+    end
+  end
+end