Improved rake tasks for database setup

Database will be created if it doesn't exist.
Included Postgres settings for testing but currently no tests are written.

Rakefile

@@ -4,7 +4,6 @@ Bundler::GemHelper.install_tasks
 require 'cucumber/rake/task'
 require 'rspec/core/rake_task'
 
-
 task :cleanup_rcov_files do
   rm_rf 'coverage.data'
 end
@@ -51,64 +50,93 @@ namespace :test do
   Cucumber::Rake::Task.new(:cucumber)
 
   namespace :setup do
-    desc "Setup a postgresql database based on the spec/support/database.yml settings (under postgresql)"
-    task :postgresql do
+    task :environment do
+      require 'mongify'
       require './spec/support/config_reader'
+      require 'yaml'
+    end
+
+    desc "Setup a postgresql database based on the spec/support/database.yml settings (under postgresql)"
+    task postgresql: :environment do
       require 'active_record'
+      require 'pg'
+
       ::CONNECTION_CONFIG = ConfigReader.new('spec/support/database.yml')
+
+      create_pg_database(CONNECTION_CONFIG)
+
       ActiveRecord::Base.establish_connection(CONNECTION_CONFIG.postgresql)
       conn = ActiveRecord::Base.connection
-      conn.create_table(:users, :force => true) do |t|
-        t.string :first_name, :last_name
-        t.timestamps
-      end
 
-      conn.create_table(:posts, :force => true) do |t|
-        t.string :title
-        t.integer :owner_id
-        t.text :body
-        t.datetime :published_at
-        t.timestamps
-      end
+      build_tables(conn)
 
-      conn.create_table(:comments, :force => true) do |t|
-        t.text :body
-        t.integer :post_id
-        t.integer :user_id
-        t.timestamps
-      end
-      puts "Finished"
+      puts "Database Setup Finished"
     end
 
     desc "Setup a mysql database based on the spec/support/database.yml settings"
-    task :mysql do
-      require './spec/support/config_reader'
+    task mysql: :environment do
+      require 'mysql2'
       require 'active_record'
+
       ::CONNECTION_CONFIG = ConfigReader.new('spec/support/database.yml')
+
+      create_mysql_database(CONNECTION_CONFIG)
+
       ActiveRecord::Base.establish_connection(CONNECTION_CONFIG.mysql)
       conn = ActiveRecord::Base.connection
-      conn.create_table(:users, :force => true) do |t|
+
+      build_tables(conn)
+
+      puts "Database Setup Finished"
+    end
+
+    #######
+    private
+    #######
+
+    def build_tables(conn)
+      conn.create_table(:users, force: true) do |t|
         t.string :first_name, :last_name
-        t.timestamps
+        t.timestamps null: false
       end
 
-      conn.create_table(:posts, :force => true) do |t|
+      conn.create_table(:posts, force: true) do |t|
         t.string :title
         t.integer :owner_id
         t.text :body
         t.datetime :published_at
-        t.timestamps
+        t.timestamps null: false
       end
 
-      conn.create_table(:comments, :force => true) do |t|
+      conn.create_table(:comments, force: true) do |t|
         t.text :body
         t.integer :post_id
         t.integer :user_id
-        t.timestamps
+        t.timestamps null: false
       end
-      puts "Finished"
+    end
+
+    def create_mysql_database(config)
+      client = Mysql2::Client.new(host: config.mysql["host"] || "localhost",
+                                  username: config.mysql["username"] || "root",
+                                  password: config.mysql["password"])
+
+      client.query("CREATE DATABASE IF NOT EXISTS #{config.mysql["database"]}")
+      client.close
+    end
+
+    def create_pg_database(config)
+      client = PG.connect(host: config.postgresql["host"] || "localhost",
+                          dbname: 'postgres',
+                          user: config.postgresql["username"] || "root",
+                          password: config.postgresql["password"])
+
+      missing_db = client.exec("SELECT 1 FROM pg_database where datname='#{config.postgresql["database"]}'").values.empty?
+      client.exec("CREATE DATABASE #{config.postgresql["database"]}") if missing_db
+      client.flush
+      client.close
     end
   end
 end
 
-task :default => ['test']
+task default: ['test']

spec/support/database.example

@@ -10,6 +10,15 @@ mysql:
   host: localhost
   port: 3306
 
+postgresql:
+  adapter: postgresql
+  database: mongify_test
+  encoding: unicode
+  username: root
+  password: passw0rd
+  host: localhost
+  port: 5432
+
 mongo:
   adapter: mongo
   database: mongify_test