replace sqlite3 to postgresql

Gemfile

@@ -16,7 +16,6 @@ gem 'will_paginate'
 gem 'nokogiri'
 gem 'unicorn'
 gem 'devise'
-gem 'sqlite3'
 
 
 gem 'activesupport','4.0.0'

Gemfile.lock

@@ -170,7 +170,6 @@ GEM
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (~> 2.8)
-    sqlite3 (1.3.8)
     tddium (1.16.2)
       highline
       json
@@ -230,7 +229,6 @@ DEPENDENCIES
   selenium-webdriver
   simplecov
   slim
-  sqlite3
   tddium
   thin
   unicorn

config/database.yml

@@ -13,7 +13,7 @@
 # gem 'pg'
 #
 development:
-  adapter: sqlite3
+  adapter: postgresql
   encoding: unicode
   database: libr_development
   pool: 5
@@ -40,7 +40,7 @@ development:
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
-  adapter: sqlite3
+  adapter: postgresql
   encoding: unicode
   database: libr_test
   pool: 5

db/schema.rb

@@ -13,6 +13,9 @@
 
 ActiveRecord::Schema.define(version: 20140117135051) do
 
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
   create_table "auth_keys", force: true do |t|
     t.integer  "user_id"
     t.string   "name"
@@ -86,7 +89,7 @@ ActiveRecord::Schema.define(version: 20140117135051) do
     t.string   "last_sign_in_ip"
   end
 
-  add_index "users", ["email"], name: "index_users_on_email", unique: true
-  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
+  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
+  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
 
 end