我创建了这个简单的Web应用程序，将数据放入Firebase数据库中。问题是在浏览器中打开网页时出现错误。这是我得到的错误
Possibly unhandled rejection: {} angular.js:14324
同样，当我第一次按下sumbit按钮时，在字段中没有数据时，它也会显示与上述相同的错误。然后，当我再次按下按钮时，它确实将空字段提交给数据库。我认为angular发现字段为空是一个问题。我想念什么吗？将文本放在字段中可以很好地工作，并且还可以提交到数据库。只是空字段才是问题。
var app = angular.module("sampleApp", ["firebase"]);
app.controller("SampleCtrl", function($scope, $firebaseArray) {
var ref = firebase.database().ref().child("messages");
$scope.loading = true;
$firebaseArray(ref).$loaded().then(function(){
$scope.loading = false;
document.getElementById('loader').style.display = 'none';
});
$scope.messages = $firebaseArray(ref);
$scope.addMessage = function() {
$scope.messages.$add({
name: $scope.name,
company: $scope.company,
reason: $scope.reason,
wayofcontact: $scope.wayofcontact,
});
$scope.name = '';
$scope.company = '';
$scope.reason = '';
$scope.wayofcontact = '';
document.getElementById("name").focus();
};
});<!DOCTYPE html>
<html ng-app="sampleApp">
<head>
<meta charset="utf-8">
<title>AngularJS Tutorial</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0/angular.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css" integrity="sha384-AysaV+vQoT3kOAXZkl02PThvDr8HYKPZhNT5h/CXfBThSRXQ6jW5DO2ekP5ViFdi" crossorigin="anonymous">
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<style>
[ng\:cloak], [ng-cloak], [data-ng-cloak], [x-ng-cloak], .ng-cloak, .x-ng-cloak {
display: none !important;
}
ul {
list-style-type: none;
}
</style>
</head>
<body ng-controller="SampleCtrl" ng-cloak >
<div class="container" ng-view>
<div ng-show="loading">
Loading...
</div>
<ul class="list-unstyled">
<li ng-repeat="message in messages | filter:{name: '!!'}">
<h1>{{message.name}}</h1>
<p>
Bedrijf: {{message.company}}<br>
Reden: {{message.reason}}<br>
Email/telefoon: {{message.wayofcontact}}<br>
</p>
<button ng-click="messages.$remove(message)" class="btn btn-danger">Verwijder verzoek</button>
<br><br>
</li>
</ul>
<form ng-submit="addMessage()" novalidate>
<div class="row">
<div class="col-xs-6 form-group">
<input type="text" class="form-control" id="name" ng-model="name" placeholder="Naam" autofocus required/>
</div>
<div class="col-xs-6">
<input type="text" class="form-control" ng-model="namecolleague" placeholder="Naam collega" required/>
</div>
<div class="col-xs-12 form-group">
<input type="text" class="form-control" ng-model="company" placeholder="Bedrijf" required/>
</div>
<div class="col-xs-12 form-group">
<textarea rows="3" type="text" class="form-control" ng-model="reason" placeholder="Reden van bellen" required></textarea>
</div>
<div class="col-xs-12 form-group">
<input type="text" class="form-control" ng-model="wayofcontact" placeholder="Email of nummer" required/>
</div>
<div class="col-xs-12 form-group">
<button type="submit" class="btn btn-primary">Add Message</button>
</div>
</div>
</form>
</div>
<script type="text/javascript" src="https://www.gstatic.com/firebasejs/3.6.0/firebase.js"></script>
<script type="text/javascript" src="https://cdn.firebase.com/libs/angularfire/2.1.0/angularfire.min.js"></script>
<script type="text/javascript" src="scripts/app.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
authDomain: "xxxxxxxxxxxxxxxxxxxx",
databaseURL: "xxxxxxxxxxxxxxxxxxxxxxxxxxx",
storageBucket: "xxxxxxxxxxxxxxxx",
messagingSenderId: "xxxxxxxxxxx"
};
firebase.initializeApp(config);
</script>
</body>
</html>最佳答案
此错误似乎是作为$ qProvider的一部分添加的，用于配置$ q
https://docs.angularjs.org/api/ng/provider/$qProvider
对错误进行了搜索，因为它看起来并不熟悉，但看起来您可以使用此提供程序在配置块中禁用该功能
app.config(['$qProvider', function ($qProvider) {
$qProvider.errorOnUnhandledRejections(false);
}]);
我猜想要添加的唯一一件事是，在此处必须返回失败的 promise ，但没有注册错误处理程序。