Yii CDBCriteria 复杂连接查询

Question

我有 3 张桌子：

1. 银行
2. bank_details
3. bank_bank_details

它们之间的关系：

银行模式：

public function relations() {
        return array(
            'bankBankDetails' => array(self::HAS_MANY, 'BankBankDetails', 'bank_id'),
        );
}

bank_details 模型：

public function relations() {
        return array(
            'bankBankDetails' => array(self::HAS_MANY, 'BankBankDetails', 'bank_details_id'),
        );
    }

bank_bank_details 模型：

public function relations()
    {
        return array(
            'bank' => array(self::BELONGS_TO, 'Bank', 'bank_id'),            
            'bankDetails' => array(self::BELONGS_TO, 'BankDetails', 'bank_details_id'),
        );
    }

我想在 bank_details 模型的管理视图中获取银行详细信息，例如 bank_name、ifsc 等信息。

我生成的正常 SQL 查询运行良好：

SELECT b.name
FROM bank b
LEFT JOIN bank_bank_details bbd ON bbd.bank_id = b.bank_id
LEFT JOIN bank_details bd ON bd.bank_details_id = bbd.bank_details_id
WHERE bd.bank_details_id = bbd.bank_details_id
LIMIT 0 , 30

现在我只想将它与 Yii CDBCriteria 集成，但它不适合我。请检查以下代码：

public function search() {
        $criteria = new CDbCriteria;    
//        select b.name
//        from bank b
//        left join bank_bank_details bbd
//        on bbd.bank_id = b.bank_id
//        left join bank_details bd on bd.bank_details_id = bbd.bank_details_id
//        WHERE bd.bank_details_id = bbd . bank_details_id;

        $criteria->compare('bank_details_id', $this->bank_details_id);
        $criteria->compare('first_holder_name', $this->first_holder_name, true);
        $criteria->compare('nominee1', $this->nominee1, true);
        $criteria->select = 'b.name';
        $criteria->join = 'LEFT JOIN bank_bank_details bbd ON bbd.bank_id = b.bank_id ';
        $criteria->join .= 'LEFT JOIN bank_details bd ON bd.bank_details_id = bbd.bank_details_id';
        $criteria->condition = 'bd.bank_details_id = bbd.bank_details_id';

        return new CActiveDataProvider($this, array(
            'criteria' => $criteria,
            'pagination' => array(
                'pageSize' => 10,
            ),
        ));
    }

错误： 发现错误 500 CDbCommand 执行 SQL 语句失败：SQLSTATE[42S22]: Column not found: 1054 Unknown column 'b.bank_id' in 'on Clause'

任何帮助将不胜感激。

Answer 1

您需要为您的表设置别名，如下所示： $criteria->alias='b'; 或使用默认别名“t”而不是“b”

阅读更多 http://www.yiiframework.com/doc/api/1.1/CDbCriteria#alias-detail

Answer 2

试试：

public function search() {
    $criteria = new CDbCriteria;    
    $criteria->compare('bank_details_id', $this->bank_details_id);
    $criteria->compare('first_holder_name', $this->first_holder_name, true);
    $criteria->compare('nominee1', $this->nominee1, true);
    $criteria->select = 'bank.name';
    $criteria->with = array(
         'bankBankDetails' => array('joinType'=>'LEFT JOIN'),
         'bankBankDetails.bank' => array('joinType'=>'LEFT JOIN'),
    );
    $criteria->addCondition('t.bank_details_id = bankBankDetails.bank_details_id');

    return new CActiveDataProvider($this, array(
        'criteria' => $criteria,
        'pagination' => array(
            'pageSize' => 10,
        ),
    ));
}

主表（在 FROM 中）有别名 t 并且在 compare 之后你已经有了一些条件，而不是你需要添加到现有的，而不是重写

更新

如果您从模型bank_details 进行查询，则主表（在FROM 中）必须是bank_details。查询将是：

SELECT b.name
FROM bank_details bd
LEFT JOIN bank_bank_details bbd ON bd.bank_details_id = bbd.bank_details_id
LEFT JOIN bank b bbd ON bbd.bank_id = b.bank_id
WHERE bd.bank_details_id = bbd.bank_details_id
LIMIT 0 , 30

Answer 3

这里 $criteria->select = 'b.name'; 您只选择了银行名称，没有选择 id

不确定 yii 格式之类的

$criteria->select = 'b.name,b.bank_id';

或

$criteria->select = array('b.name,b.bank_id');

Answer 4

正如@Evgeniy 提到的，您需要使用$criteria->alias = 'b'; 设置别名

http://www.yiiframework.com/doc/api/1.1/CDbCriteria#alias-detail

您可能还想研究使用CDbCriteria::with，您可以使用它来选择相关模型。

http://www.yiiframework.com/doc/api/1.1/CDbCriteria#with-detail

如果您使用上述内容，请确保您也正确使用了CDbCriteria::together。要一次选择所有相关模型，请将其设置为true；

http://www.yiiframework.com/doc/api/1.1/CDbCriteria#together-detail