返回一个对象的参数

Question

我想给一个函数返回我一个人的名字，当我给我的函数一个id。下面是我做了什么：

nameOfPerson(personjson, personId){ 
    let id = personId; 
    let json = personjson.json(); 
    let data = []; 

    //console.log("id in nameOfPerson method " + id); 
    //console.log("json in nameOfPerson method " + JSON.stringify(json)) 

    for (let person of json){ 
     let newPerson = new Person() 
     newPerson.text = person.firstName + ' ' + person.lastName, 
     newPerson.id = person.id 
     if (id == newPerson.id){ 
     data.push(newPerson.text) 
     } 
     console.log("data on nameOfPerson method " + JSON.stringify(data)) 
     return JSON.stringify(data); 
    } 
} 

这是由这个函数调用：

getPersonNamebyId(personId): Promise<Person[]> { 
    return this.http.get(this.PersonsUrl) 
         .toPromise() 
         .then(response => this.nameOfPerson(response, personId)) 
         .catch(this.handleError) 
} 

而这一次在这里叫：

//parsingFunction 
    parseAppointment(appointmentJson) { 
    let data = new Array(); 
    let json = appointmentJson.json() 
     for (let appointment of json) { 
     let newAppointment = new Appointment() 
     newAppointment.text = appointment.reason +' '+ this.personsService.getPersonNamebyId(appointment.personId), // this.personsService.getPersonNamebyId(appointment.personId) 
     newAppointment.id = appointment.id, 
     newAppointment.ownerId = appointment.personId, 
     newAppointment.startDate = appointment.date, 
     newAppointment.endDate = this.add30mnTo(appointment.date), 
     data.push(newAppointment); 
     } 
     console.log(data) 
     return data 
    } 

这里称为：

getAppointments(): Promise<Appointment[]> { 

    return this.http.get(this.AppointmentUrlGet) 
       .toPromise() 
       .then(response => this.parseAppointment(response)) 
       .catch(this.handleError); 

    } 

整个事情的目标是转换的这一个对象：

[ 
{ 
id: "bc127c74-377b-4ea6-925a-3dd5e0227482", 
reason: "testing", 
date: "2017-06-22T14:59:55.000Z", 
personId: "8090210d-e154-4db0-96c1-42688f45971a" 
}, 
{ 
id: "bc127c74-377b-4ea6-925a-3dd5e0227482", 
reason: "testing02", 
date: "2017-06-22T14:59:55.000Z", 
personId: "8090210d-e154-4db0-96c1-42688f45971a" 
} 
] 

的人（ID = appointment.id，文本=原因+ OWNERNAME）对象的

这就是为什么我使用所有者/ person.id我getPersonById功能。

我想获得连接，将personId

在我的控制台日志的人的名字，它说：[Object对象]的人没有名字...... （也约会的细胞同样的事情）

你能告诉我我的错误在哪里吗？

非常感谢

Answer 1

据我所看到的，你其实只是想做到这一点：

var nameOfPerson = (personjson, personId) => { 
    var {firstName,lastName,id} = 
    personjson.json().find(el=>el.id === personId); 

    return firstName && lastName&&id 
    ? { text: firstName+lastName, id } //maybe Object.assign(new Person(),{text: ... }) instead 
    : { id: "unknown"}; 
}; 

使用方法如下：

var {text, id} = nameOfPerson(json,12); 
console.log(" text",text,"id",id); 

或者在一个承诺：

getjson().then(
    json => nameOfPerson(json,12) 
) 
.then(
    ({text, id}) => console.log(text,id) 
);