jQuery 验证错误放置和所需的文本放置

Question

我创建了一个使用 jQuery 验证的表单，我需要移动两个字段的错误消息，所以我在这里找到了一个示例，展示了如何做到这一点，并且效果很好。除了现在，“必填”字段并非全部有效。这是我的表单代码：

<form id="myForm"> 
  <div class="form-group">
    <label for="x_po_num">Account Number</label>
    <input type="text" class="form-control" name="x_po_num" id="x_po_num">       
  </div>
  <div class="form-group">
      <label for="x_invoice_num">Invoice Number</label>
      <div class="input-group">
        <div class="input-group-addon">9</div> 
        <input class="form-control" name="x_invoice_num" id="x_invoice_num" data-error="#invError">
      </div>         
      <div id="invError"></div>
  </div>        
  <div class="form-group">
      <label for="x_reference_3">Reference Number</label>
      <input class="form-control" name="x_reference_3" id="x_reference_3" placeholder="Optional" >          
  </div>
  <div class="form-group">
      <label for="x_amount">Amount</label>
      <div class="input-group">
        <div class="input-group-addon">$</div>              
        <input class="form-control" name="x_amount" id="x_amount" data-error="#amtError">
      </div>
      <div id="amtError"></div>
  </div>     
  <input class="btn btn-primary" value="Pay With Your Credit Card" type="submit"> 
</form>

这是我的 jQuery 验证代码：

$( "#myForm" ).validate({
    rules: {
      x_po_num: {
        required: true,
        digits: true,
        minlength: 11,
        maxlength: 11
      },
      x_invoice_num: {
        required: true,
        digits: true,            
        maxlength: 9,
        minlength: 7,
        normalizer: function( value ) {
          var inv = value;
          inv = "9" + inv;             
          return inv;             
        } 
      },
      x_reference_3: {
        digits: true,
        maxlength: 9,
      },
      x_amount: {
        required: true,
        number: true
      }
    },
    messages: {              
      x_po_num: {
        required: "Please enter an account number",
        minlength: "The account number must be 11 digits long",
        maxlength: "The account number must be 11 digits long",
        digits: "Please enter digits only, no spaces"
      },
      x_invoice_num: {
        required: "Please enter an invoice number",         
        maxlength: "The invoice number must be 10 digits or less",
        minlength: "The invoice number must be at least 8 digits long",
        digits: "Please enter digits only, no spaces"
      },
      x_reference_3: {
        digits: "Please enter digits only",
        maxlength: "The reference number must be 9 digits or less"
      },
      x_amount:{
        required: "Please enter an amount"
      }

    },
    errorPlacement: function(error, element) {
      var placement = $(element).data('error');
      if (placement) {
        $(placement).append(error)
      } else {
        error.insertAfter(element);
      }
    }   
});

问题出在这里：

我需要移动错误消息的两个字段（发票编号和金额）现在位于正确的位置。但是，如果我打开表单并在不输入任何数据的情况下点击提交，我预计发票编号会出现错误，显示“请输入发票编号”，但事实并非如此。它根本不显示任何错误。

Answer 1

原来是归一化函数。我把它拿出来，用我的 onSubmit 添加数字，问题就解决了。