yii2 new Expression

yii2 new Expression,new Expression,new \yii\db\Expression,yii2 FIND_IN_SET,yii sql,yii\db\Expression

演示一段yii2 关于 new Expression 或者 new \yii\db\Expression 的sql语句

首先

use yii\db\Expression;
$params = ['1','2'];
 
 
$query = Model::find();
 
$where = ['or'];
$query->where('1=1');
foreach($params as $v){
    $where[] = new Expression('FIND_IN_SET(:field, field)',[':field'=>$v]);
}
$query->andWhere($where)->asArray();
 
echo $query->createCommand()->getRawSql();
输出sql语句：

SELECT * from `table` where 1=1 AND ((FIND_IN_SET('2', field)) OR (FIND_IN_SET('2', field)));
修改：

//切记 字符串中包含变量用双引号""，否则变量不会解析。
$i = 0;
foreach($params as $v){
    $where[] = new Expression("FIND_IN_SET(:field_$i, field)",[":field_$i"=>$v]);
}
//切记 字符串中包含变量用双引号""，否则变量不会解析。

再次输出sql语句：

SELECT * from `table` where 1=1 AND ((FIND_IN_SET('1', field)) OR (FIND_IN_SET('2', field)));