Question

当我使用ng服务运行我的应用时，我收到了以下错误。但我可以看到参数，参数数量是否正确。

src / app / Services / customer.service.ts（27,20）：提供的参数与呼叫目标的任何签名都不匹配。

服务：

  //With Observable
  getCustomers(): Observable<Customer[]> {
    console.log('getCountries Service call starting...');
    let apiURL = `${this.apiRoot}Customers/`;
    return this.http.get(apiURL)
      .map(res => 
      {
        console.log('getCountries result: ' + res.text());
        return res.json().results.map(item => 
          {
            return new Customer(
              item.CustomerID,
              item.Username,
              item.Password,
              item.Email,
              item.Firstname,
              item.Lastname,
              item.Address,
              item.PostCode,
              item.City,
              item.OrderStatus,
              item.FK_CountryID,
              item.Country1,
              item.Picture,
              item.CreateDate
            );
          }
        )
      })
      .catch(error => {
        console.log(error);
        return Observable.throw(error.json());
      });
  }

型号：

export class Customer {
    CustomerID:number
    Username:string
    Password:string
    Email:string
    Firstname:string
    Lastname:string
    Address:string
    PostCode:string
    City:string
    OrderStatus:string  
    FK_CountryID:number
    Country1:string
    Picture:string
    CreateDate:string
    constructor(CustomerID:number,Username:string,Password:string,Email:string,Firstname:string,
    Lastname:string, Address:string, PostCode:string, City:string, OrderStatus:string,FK_CountryID:number,
    Country1:string, Picture:string, CreateDate:string){
        this.CustomerID = CustomerID
        this.Username = Username
        this.Password = Password
        this.Email = Email
        this.Firstname = Firstname
        this.Lastname = Lastname
        this.Address = Address
        this.PostCode = PostCode
        this.City = City
        this.FK_CountryID = FK_CountryID
        this.Country1 = Country1
        this.Picture = Picture
        this.CreateDate = CreateDate
    }
}

Answer 1

这很奇怪，我只做了一个简单的更改并且它有效，我认为Cli无法正确构建，因此在模型类中进行更改使CLI再次构建（我猜）。

所以我改变了这个：

CreatureBehavior

如下（我只在{）之后按Enter键：

def select_user_role (user)
    @user = user
    collection_select(:user, :role, User.roles.to_a, :first, :first, {}, {
        data: {user_id: @user.id},
        onChange: ""
    })
end

所以从字面上看，我没有做任何改动，但强迫CLI再次反复思考。

我也回滚了这个变化，它又恢复了正常。！？！

Answer 2

似乎出现了可移植问题，只是停止了该应用程序，然后使用ng serve命令再次运行。它对我有用

Angular 4提供的参数与呼叫目标的任何签名都不匹配

2 个答案: