Rails連接mysql數據庫在ubuntu上跑

Rails安裝好 Rails 在ubuntu上安裝rails(rvm ruby gem Bootstrap bootswatch)

rails 4.1.4

ruby 2.2.0

1. sudo apt-get install mysql-server mysql-client 安裝mysql(安裝過程中設置mysql用戶root密碼)

2. sudo apt-get install libmysqlclient-dev (https://github.com/brianmario/mysql2 看這段說明Linux and other Unixes)

3. mysql -u root -p (用mysql的root用戶登錄mysql)

4. create database railstest; (創建數據庫)

5. show databases; (查看數據庫)

6. exit (退出數據庫)

7. rails new trails -d mysql

8. cd trails

9. vi config/database.yml (連接數據的文件,修改爲以下)

   default: &default
     adapter: mysql2
     encoding: utf8
     pool: 5
     username: root
     password: mysql用戶root密碼
     socket: /var/run/mysqld/mysqld.sock
   
   development:
     <<: *default
     database: railstest

10. vi Gemfile (修改gem 'mysql2')

    gem 'mysql2','~> 0.3.20'
    

11. bundle install (安裝Gemfile裏的軟件)

12. 測試

    ails g scaffold product name:string price:decimal description:text  (創建表)

    rake db:migrate (創建表)

    
    

備註:

報錯:Specified 'mysql2' for database adapter, but the gem is not loaded.與mysql2的版本有關,參考這裏https://github.com/brianmario/mysql2

Ruby on Rails / Active Record

• mysql2 0.4.x works with Rails / Active Record 4.2.5 - 5.0 and higher.

• mysql2 0.3.x works with Rails / Active Record 3.1, 3.2, 4.x, 5.0.

• mysql2 0.2.x works with Rails / Active Record 2.3 - 3.0.