javascript - 使用 AngularJS 注册

Question

我想使用 AngularJS 进行一个非常简单的注册。首先，我通过此电子邮件获取用户并将其分配给 $scope.users。如果方法“GetUserByEmail”返回多个用户，我会尝试显示消息“用户已存在”。这是问题。避免使用 GetUserByEmail 方法。程序“跳转”到“if”条件并且 $scope.users 始终为空，我不知道为什么。有时将用户添加到数据库后，该方法会返回对象数组并分配给 $scope.users

这是我使用 CreateUser 方法的代码:

var RegisterController = function ($scope, Api, $http) {

    $scope.users = {
    }

    $scope.CreateUser = function () {
        var user = {
            Password: $scope.password,
            Name: $scope.name,
            Surname: $scope.surname,
            Email: $scope.email,
            DateOfBirth: $scope.dateofBirth
        }

        Api.GetUserByEmail("Users", "GetUserByEmail", $scope.email).then(function (d) {
                $scope.users = d;
            }); 

        if ($scope.users.length > 0)
        {
            alert("User already exists!");
            $scope.users = {};
        }
        else
        {
            Api.PostUser("Users", "PostUser", user).then(function (d) {
                alert("Hello");
            });
        }


    };
}

RegisterController.$inject = ['$scope', 'Api', '$http'];

以及方法 GetUserByEmail:

this.GetUserByEmail = function (controllerName, methodName, email) {
        var promise = $http({
            method: 'GET',
            url: 'api/' + controllerName + '/' + methodName  + '?email=' + email,
            config: {
                params: {
                    "email": email
                }
            }
        })
        .then(function onSuccess(response) {
            return response.data;
        },
        function onError(response) {
            return response.statusText;
        });
        return promise;
    }

Answer 1

试试这个!

var RegisterController = function($scope, Api, $http) {

  $scope.users = {}

  $scope.CreateUser = function() {
    var user = {
      Password: $scope.password,
      Name: $scope.name,
      Surname: $scope.surname,
      Email: $scope.email,
      DateOfBirth: $scope.dateofBirth
    }

    Api.GetUserByEmail("Users", "GetUserByEmail", $scope.email).then(function(d) {
      $scope.users = d;
      if ($scope.users.length > 0) {
        alert("User already exists!");
        $scope.users = {};
      } else {
        Api.PostUser("Users", "PostUser", user).then(function(d) {
          alert("Hello");
        });
      }
    });

  };
}

RegisterController.$inject = ['$scope', 'Api', '$http'];