Angularjs Ng显示不适用于表单验证

我正在尝试使用ng show，但由于一些奇怪的原因，它没有出现在屏幕上。 当用户点击第一个名字时，它应该从未被触碰转换为被触碰，但仍然没有出现错误代码

<form role="form" novalidate>
        <h2>Please Sign Up</h2>
        <div class="row">
            <div class="col-xs-12 col-sm-6 col-md-6">
                <div class="form-group">
          <input type="text" class="form-control input-lg" name="fname" ng-model="registerViewModel.first_name" placeholder="First Name" tabindex="1" required="" />
          <div ng-show="form.fname.$touched">
            <div ng-show="form.fname.$error.required">Tell us your name</div>
          </div>
                </div>
            </div>
            <div class="col-xs-12 col-sm-6 col-md-6">
                <div class="form-group">
                    <input type="text" class="form-control input-lg" ng-model="registerViewModel.last_name" placeholder="Last Name" tabindex="2">
                </div>
            </div>
        </div>
        <div class="form-group">
            <input type="email" class="form-control input-lg" ng-model="registerViewModel.email" placeholder="Email Address" ng-model="email" tabindex="4">
        </div>
        <div class="row">
            <div class="col-xs-12 col-sm-6 col-md-6">
                <div class="form-group">
                    <input type="password" class="form-control input-lg" ng-model="registerViewModel.password" placeholder="Password" tabindex="5">
                </div>
            </div>
            <div class="col-xs-12 col-sm-6 col-md-6">
                <div class="form-group">
                    <input type="password" class="form-control input-lg" ng-model="registerViewModel.confirmPassword" placeholder="Confirm Password" tabindex="6">
                </div>
            </div>
        </div>

        <div class="row">

            <div class="col-xs-8 col-sm-9 col-md-9">
                 By clicking <strong class="label label-primary">Register</strong>, you agree to the <a href="#" data-toggle="modal" data-target="#t_and_c_m">Terms and Conditions</a> set out by this site, including our Cookie Use.
            </div>
        </div>

        <hr class="colorgraph">
        <div class="row">
            <div class="col-xs-12 col-md-6"><input type="button" ng-click="adminRegister.registrationRequest()" value="Register" class="btn btn-primary btn-block btn-lg" tabindex="7"></div>
        </div>
    </form>

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您的表单没有名称。您应该这样定义它：

<form role="form" name="myname" novalidate>

然后用它的名字

myname.fname…