Yii2 中常用的增删改查操作总结

一、新增

1、使用save()

$model = new User();
$model->name = 'test'; 
$model->phone = '13000000000'; 
$model->email = '123456@qq.com'; 
$model->save();

2、使用createCommand 原生sql

$sql = "insert into user (name, phone, email) values ('test', '13000000000', '123456@qq.com')";
Yii::$app->db->createCommand($sql)->execute();

3、使用createCommand insert

Yii::$app->db->createCommand()->insert('user', [ 'name' => 'test',
    'phone' => '13000000000',
    'email' => '123456@qq.com' ])->execute();

4、批量插入

Yii::$app->db->createCommand()->batchInsert('user', ['name', 'phone', 'email'], [
    ['test1', '13000000000', '123456@qq.com'], ['test2', '13000000001', '234567@qq.com']
])->execute();

 5、使用save()并校验参数正确性

    $data = [ 'name' => 'test',
            'phone' => '13000000000',
            'email' => '123456@qq.com' ]; $model = new User(); // 将数据填充到模型的属性中
        $model->load($data, ''); // 等效于下面这样：
        // $model->attributes = $data;
        // 或者
        // $model->setAttributes($data);
        if ($model->validate()) { // 通过验证
            $model->save();
        } else { // 验证失败: $errors 是一个包含错误信息的数组
            $errors = $model->errors;
        }

二、删除

1、使用delete()

$user = User::find()->where(['name' => 'test'])->one(); $user->delete();

2、使用deleteAll()批量删除

User::deleteAll(['name' => 'test']);

3、使用createCommand delete()

Yii::$app->db->createCommand()->delete('user', ['name' => 'test'])->execute();

4、使用createCommand 原生sql

$sql = "delete from user where name = 'test'";
Yii::$app->db->createCommand($sql)->execute();

三、更新

1、使用update()

$user = User::find()->where(['name' => 'test'])->one(); 
$user->phone = '13100000000'; 
$user->update();  // 或者 $user->save();

2、使用updateAll()

User::updateAll(['phone' => '13100000000'], ['name' => 'test']);

3、使用createCommand update()

Yii::$app->db->createCommand()->update('user', ['phone' => '13100000000'], ['name' => 'test'])->execute();

4、使用createCommand 原生sql

$sql = "update user set phone = '13100000000' where name = 'test'";
Yii::$app->db->createCommand($sql)->execute();

四、查询

1、使用model

// 查询一条记录
User::find()->select(['name', 'phone', 'email'])
->where(['phone' => '13000000000'])
->andWhere(['like', 'name', 'test'])
->one(); 
// 查询一条记录数组返回
User::find()->where(['name' => 'test'])->asArray()->one(); 
// 查询所有记录
User::find()->where(['name' => 'test'])->all(); 
// 查询所有记录数组返回
User::find()->where(['name' => 'test'])->asArray()->all();

2、使用createCommand

// 查询一条记录
Yii::$app->db->createCommand("select * from user where name = :name and phone = :phone")->bindValues([':name' => 'test', ':phone' => '13000000000'])->queryOne(); 
// 查询所有记录
Yii::$app->db->createCommand("select * from user where name = :name and phone = :phone")->bindValues([':name' => 'test', ':phone' => '13000000000'])->queryAll();

3、使用yii\db\Query()

(new \yii\db\Query())->from('user')->where(['name' => 'test'])->all();

4、子查询

$subQuery = (new \yii\db\Query())->select(['id'])->from('user')->where(['like', 'name', 'test'])->all();
(new \yii\db\Query())->from('user')->where(['in', 'id', $subQuery])->all();

5、yii2查看sql语句

$query = User::find()
  ->where(['id'=>[1,2,3,4])
  ->select(['username'])
 
// get the AR raw sql in YII2
$commandQuery = clone $query;
echo $commandQuery->createCommand()->getRawSql();
 
$users = $query->all();