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thinkphp中数据更新时的现象

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Release: 2016-06-23 14:02:54
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  $result = $User->where("u_id=".$user_id)->setField('img_url',$url);
  if($result !== false){
        echo '数据更新成功!';
    }else{
        echo '没更新任何数据!';
    }

当$url的值不变,多次提交时,
第一次成功,后面的都是false。

这是是什么机制?有知道的童学解释一下啊。



回复讨论(解决方案)

看手册上面说,你还需要传递一个条件就可以保存成功了,前提是u_id为主键。
修改代码如下:  $result = $User->where("u_id=".$user_id)->setField(array('u_id','img_url'),array($user_id,$url));

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