我有这个问题,当我点击登录按钮时,chrome 控制台会记录这个:
angular.min.js:117 TypeError: Cannot read property 'then' of undefined at m.$scope.logIn (loginModuleController.js:11)
服务:
angular.module('loginModule')
.factory('loginService', function($http){
return{
login: function(username, password){
var session;
$http.post('../server/php/auth/auth.php', {
username: username,
password: password
})
.then(function(res){
session = res;
});
return session;
},
isLogged: function(){
return $http.get('../angCMS/server/php/auth.php?is_logged=true');
},
logOut: function(){
return $http.get('../angCMS/server/php/auth.php?logout=true');
}
};
});
Controller :
angular.module('loginModule')
.controller('LoginCtrl', ['$scope', 'loginService', function($scope, loginService){
$scope.auth = false;
$scope.username;
$scope.password;
$scope.logIn = function(){
loginService.login($scope.username, $scope.password).then(function(response){
}, function(res){
});
};
$scope.isLogged = function(){
loginService.isLogged()
.then(function(response){
if(response){
$scope.auth = true;
}
});
};
$scope.logOut = function(){
loginService.logOut()
.then(function(response){
if(response){
$scope.auth = false;
}
});
};
}]);
这是 html 模板:
<div class="container" ng-if="auth==false">
<div class="col-md-4 col-md-offset-4">
<div class="row">
<br/><h2 align="center">Login</h2>
</div>
<div class="well">
<form class="form-horizontal">
<fieldset>
<div class="form-group">
<input type="text" class="form-control" placeholder="Username" ng-model="username" required>
</div>
<div class="form-group">
<input type="password" class="form-control" placeholder="Password" ng-model="password" required>
</div>
<div class="form-group">
<button class="btn btn-md btn-primary btn-block" type="submit" ng-click="logIn()">Sign in</button>
</div>
</fieldset>
</div>
</form>
</div>
</div>
PHP登录方法:
public function login($user, $pass){
$user = htmlspecialchars(trim($user));
$pass = md5(htmlspecialchars(trim($pass)));
$res = $this->DB->prepare("SELECT * FROM `admin` WHERE username = :user");
if(!$res->execute(Array(":user"=>$user)))
die(mysql_error());
$row = $res->fetch(PDO::FETCH_ASSOC);
if(!$row['password'] == $pass)
die("Errore: password errata!");
$_SESSION['logged'] = $row;
array_push($session, $_SESSION['logged'], true);
return $session;
}
最佳答案
这更像是一个滥用 promise 的问题。
你可能想先看看 Promise 是如何工作的:
从您的服务代码:
login: function(username, password){
var session;
$http.post('../server/php/auth/auth.php', {
username: username,
password: password
})
.then(function(res){
session = res;
});
return session;
}
当
login(username, password)
被调用, session 仍然是 undefined
回来后。这是因为
$http.post()
是一个异步函数,.then()
子句不会立即执行。正如 Snixtor's answer 所指出的,
你应该“返回
$http.post()
的返回值”:login: function(username, password){
return $http.post('../server/php/auth/auth.php', {
username: username,
password: password
});
}
然后引用您的 Controller 的登录方法:
$scope.logIn = function(){
loginService.login($scope.username, $scope.password).then(function(response){
// response === 'session'
}, function(res){
});
};
response
来自 loginService.login().then()
的参数正是您预期的值(value) session
来自您之前实现的变量。
关于javascript - AngularJS 'Cannot read property ' 然后'未定义',我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37955434/