在带有ng-messages的angularjs材料md-input-container中显示服务器端验证消息

时间:2018-06-26 15:41:52

标签: angularjs forms angularjs-material ng-messages

我有一个带有一些输入的表单,这些输入在md-input-container中。每个输入都有一些带有ng-messages指令的验证消息:

<form name="ctrl.myForm" layout="column" ng-submit="addUser(model)">

    <input hide type="submit" />
    <div layout="column" layout-padding>

        <md-input-container> 
            <label translate>Username</label>
            <input name="username" ng-model="model.username" type="text" required>
            <div ng-messages="ctrl.myForm.username.$error">
                <div ng-message="required" translate>This field is required.</div>
                <div ng-message="unique" translate>Username is used before.</div>
            </div>
        </md-input-container>

        <md-input-container> 
            <label translate>Email</label>
            <input name="email" ng-model="model.email" required>
            <div ng-messages="ctrl.myForm.email.$error">
                <div ng-message="required" translate>This field is required.</div>
                <div ng-message="email" translate>Email is not valid.</div>
            </div>
        </md-input-container>

    </div>

    <div layout="row">
        <span flex></span>
        <md-button 
            class="md-raised"
            ng-click="cancel()">
            <wb-icon>close</wb-icon>
            <span translate>Cancel</span>
        </md-button>
        <md-button 
            class="md-raised"
            ng-click="addUser(model)">
            <wb-icon>done</wb-icon>
            <span translate>Add</span>
        </md-button>
    </div>

</form>

在我的控制器中,我有一个名为addUser(model)的函数,该函数将给定数据发送到服务器并接收一些验证代码。我在$ error对象中设置了适当的键,但未显示相关消息。如果从服务器收到错误,我将密钥设置如下:

function addUser(model){
    $myService.newUser(model)//
    .then(function(user) {
        // user is created successfully.
    }, function(error) {
        ctrl.myForm.$invalid = true;
        ctrl.myForm.username.$error['unique'] = true;
        ctrl.myForm.email.$error['email'] = true;
    });
}

我希望将键设置为true时,相关消息会显示在表单中,但消息不会显示。此时,如果我更改与该字段相关的消息的值,则会显示该字段!我找不到问题。

1 个答案:

答案 0 :(得分:0)

<html> <head> <link rel="stylesheet" type="text/css" href="style.css"> </head> <body> <h1> Welcone to the booking site </h1> <h4> Please, choose a destination </h4> <form name="myTravelForm"> <label> First name: </label><br> <input type="text" name="firstname" id="firstname"/><br> <br> <select name="destination"> <option value="Antarctica" selected>Antarctica</option> <option value="Costa Rica">Costa Rica</option> </select> <input type="button" value="Add this destination" id="banana"/> </form> <div id="travelerInfo"></div> <script type="text/javascript" src="script.js"></script> </body> </html>处读到有关https://docs.angularjs.org/guide/forms的内容,也有一些示例。 ({$asyncValidators等)

简而言之:

Angularjs内置验证要求您编写和添加验证器。您不应该手动控制ctrl.$asyncValidators.username=...字段(这就是为什么它们有$前缀)的原因。 Angularjs资料也遵循这种方法。

P.S。 $invalid, $error之类的行无法连续工作的原因很简单-angularjs下一次验证运行会将其设置为false