如何在jQuery中指定已验证的字段

Question

我有两个字段:名称查询和出生日期，而名称查询是强制性的，而DoB则不是。下面的表单显示了名称查询字段下的验证消息：

​

var myForm = $("#myform").validate({
  rules: {
    NameQuery: "required",
    DoBQuery: {
      required: false
    }
  },
  messages: {
    NameQuery: "Please fill in name query field",
    DoBQuery: ""
  }
});

    <script type="text/javascript" src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/jquery.validate.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/additional-methods.js"></script>


<form id="myform" method="post" action="">
  <div>
    <label for="NameQuery">Name</label>
    <input type="text" id="NameQuery" name="NameQuery">
  </div>
  <div>
    <label for="DoBQuery">Date of Birth</label>
    <input type="text" id="DoBQuery" name="DoBQuery">
  </div>
  <input type="submit" value="Search">
</form>

​

现在，我想在Name Query字段验证消息中添加一些样式。一些代码被添加到代码片段中，请注意，<div class="error__input"></div>必须在两个字段中都存在，就像在代码片段中一样。

​

var myForm = $("#myform").validate({
  rules: {
    NameQuery: "required",
    DoBQuery: {
      required: false
    }
  },
  messages: {
    NameQuery: "Please fill in name query field",
    DoBQuery: ""
  },
  errorElement : 'div',
  errorLabelContainer: '.error__input'
});

.error__input{
  min-height: 20px;
}

<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/jquery.validate.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/additional-methods.js"></script>
<form id="myform" method="post" action="">
  <div>
    <label for="NameQuery">Name</label>
    <input type="text" id="NameQuery" name="NameQuery">
    <div class="error__input"></div>
  </div>
  <div>
    <label for="DoBQuery">Date of Birth</label>
    <input type="text" id="DoBQuery" name="DoBQuery">
    <div class="error__input"></div>
  </div>
  <input type="submit" value="Search">
</form>

​

现在在这两个字段中都存在验证消息，我理解jQuery找到了error__input div并将类应用于它，但是为什么它要将消息添加到第二个字段，以及如何将警报消息设置为只应用于第一个消息，而两个<div class="error__input"></div>都必须存在？

Answer 1

你想要这样的东西，我想：

​

var myForm = $("#myform").validate({
  rules: {
    NameQuery: "required",
    DoBQuery: {
      required: false
    }
  },
  messages: {
    NameQuery: "Please fill in name query field",
    DoBQuery: ""
  }
});

#myform .error {
    display: block;
    color: red;
}

#myform input {
  display: inline;
}

#myform > div {
  height: 50px;
}

<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/jquery.validate.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/additional-methods.js"></script>


<form id="myform" method="post" action="">
  <div>
    <label for="NameQuery">Name</label>
    <input type="text" id="NameQuery" name="NameQuery" style="display: inline-block;">
  </div>
  <div>
    <label for="DoBQuery">Date of Birth</label>
    <input type="text" id="DoBQuery" name="DoBQuery" style="display: inline-block;">
  </div>
  <input type="submit" value="Search">
</form>

​

Answer 2

您可以使用errorPlacement将错误消息放在error元素旁边。

errorPlacement: function(error,element){
   error.appendTo(element.next(".error__input"));
}

​

var myForm = $("#myform").validate({
  rules: {
    NameQuery: "required",
    DoBQuery: {
      required: false /* if it is not required, why you put here? You can simply not insert this input field in validate()'s rules. */
    }
  },
  messages: {
    NameQuery: "Please fill in name query field"
  },
  errorElement : 'div',
  errorPlacement: function(error,element){
    error.appendTo(element.next(".error__input"));
  }
});

<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/jquery.validate.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.12.0/additional-methods.js"></script>
<form id="myform" method="post" action="">
  <div>
    <label for="NameQuery">Name</label>
    <input type="text" id="NameQuery" name="NameQuery">
    <div class="error__input"></div>
  </div>
  <div>
    <label for="DoBQuery">Date of Birth</label>
    <input type="text" id="DoBQuery" name="DoBQuery">
    <div class="error__input"></div>
  </div>
  <input type="submit" value="Search">
</form>

​

Answer 3

您应该删除出生日期后的<div class="error__input"></div>标记字段。