Thinkphp两张数据表left join怎么让相同字段不被覆盖？

M('User')->join('LEFT JOIN before_conditions on before_conditions.uid=User.id')->where($mapBarCode)->select();

user表和before_conditions表都有id作为主键

现在我要得到user表的id，但查询出来的结果被before_conditions的id覆盖了，该怎么办？

回复讨论(解决方案)

我知道要改字段别名，原生的我知道，但是tp的数据库语法该怎么改

$Model->field('id,nickname as name')->select();

$name = M('User')->join('LEFT JOIN before_conditions on before_conditions.uid=User.id')->where($mapBarCode)->select();
for($i=0;$i $name_b=M('before_conditions')->where("")->find();
$name[$i]['b_id'] = $name_b['id'];
}

dump($name); 输出结果user表的id几不会被覆盖

$Model->field('id,nickname as name')->select();

$name = M('User')->join('LEFT JOIN before_conditions on before_conditions.uid=User.id')->where($mapBarCode)->select();
for($i=0;$i $name_b=M('before_conditions')->where("")->find();
$name[$i]['b_id'] = $name_b['id'];
}

dump($name); 输出结果user表的id几不会被覆盖