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HomeBackend DevelopmentPHP Tutorialyii2中使用Active Record模式的方法_PHP

本文实例讲述了yii2中使用Active Record模式的方法。分享给大家供大家参考,具体如下:

1. 在db.php中配置相应的数据库信息:

return [
  'class' => 'yii\db\Connection',
  'dsn' => 'mysql:host=localhost;dbname=yii2basic',
  'username' => 'root',
  'password' => '',
  'charset' => 'utf8',
];

2. 使用gii模块来自动生成相应的代码(访问链接http://localhost/basic/web/index.php?r=gii):
利用ModelGenerator 和CURD Generator 来自动生成相应的模型代码和增删改查的代码

3. 当数据库中的表需要进行修改时可以使用migration:

在项目中执行命令:./yii migrate/create “自己定义名称”

在项目中会生成一个新的文件夹migrations,打开文件夹中的文件:

class m150225_022640_modify_book_table extends Migration
{
  public function up()
  {
    $this->addColumn("book", "book_desc", yii\db\mssql\Schema::TYPE_TEXT);
  }
  public function down()
  {
    echo "m150225_022640_modify_book_table cannot be reverted.\n";
    return false;
  }
}

在命令行中使用命令 :./yii migrate  即可执行脚本中的up函数
在命令行中使用命令:  ./yii  migrate/down  即可执行脚本中的down函数

希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。

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