Question

我正在尝试使用jQuery的validate插件来更改用户名。我设法使用远程选项来检查我的数据库中是否找到了用户名。以下是我的工作示例。但是，如果示例表单中的Peter未更改其名称，则该字段无效，因为该名称已在数据库中。我不知何故需要包含条件 - 如果#new_name与#current_name相同，则#new_name字段有效。有可能吗？

jQuery Validation Plugin

<script type="text/javascript">
$(document).ready(function(){
   $("form").validate({
      rules: {
         new_name: {
            required: true,
            remote: {
               url: "names.php",
               type: "post",
             }
         }
      },
      messages: {
         new_name: {
            remote: jQuery.validator.format("{0} is already taken, please enter a different name.") 
     }
      }
   });
});
</script>

HTML表单：

<form method="post" id="myForm" action="">
 <!-- User enters a new name -->
 <input id="new_name" name="new_name" value="peter" type="text" />
 <!-- This is a current username, populated from the database -->
 <input id="current_name" name="current_name" value="peter" readonly="readonly" />
 <input type="submit" name="submit" id="submit"/>
</form>

远程呼叫：names.php

<?php
   $request = trim(strtolower($_REQUEST['new_name']));
   // Here is the array of all user names in my database.
   $names = array('peter','jane','bill','george');
   $valid = 'true';
   foreach($names as $name) {
      if( strtolower($name) == $request ) {
         $valid = 'false';
      }
   }
   echo $valid;
?>

Answer 1

我认为你应该这样做（服务器端）

$request = trim(strtolower($_REQUEST['new_name']));
// Here is the array of all user names in my database.
$names = array('peter','jane','bill','george');
$valid = true;
foreach($names as $name) {
  if( strtolower($name) == $request ) {
     $valid = false;
  }
}
echo json_encode($valid);

Answer 2

rules: {
         new_name: {
            required: true,
            remote: {
               url: "names.php",
               type: "post",
               data: current_name: function () {
                return $('current_name').val();
                  new_name: function () {
                return $('new_name').val();
            }
             }
         }
      },

Answer 3

您没有根据新名称检查当前名称。

试试这个：

<?php
    $request = trim( strtolower( $_REQUEST['new_name'] ) );
    $old = trim( strtolower( $_REQUEST['current_name'] ) );
    // Here is the array of all user names in my database.
    $names = array( 'peter', 'jane', 'bill', 'george' );
    $valid = 'true';

    if ( $request == $old ) {
        $valid = "true";
    } else {
        foreach ( $names as $name ) {
            if ( strtolower( $name ) == $request ) {
                $valid = 'false';
            }
        }
    }
    echo $valid;
?>

现在，如果名称未更改，则返回true，仅在更改时执行exists检查。

jQuery Validation Plugin - 比较一个远程调用中的两个表单字段

3 个答案: