Question

我有两个API api / resource / Item返回

{data: [
{name: "BE106359"},
{name: "NDBKR5050"}
]}

和项目详细信息api / resource / Item / {name}返回

{
data: {
net_weight: 0,
max_discount: 0,
item_name: "NEC | BE106359 | CD-PRTA - ISDN PRI TRUNK BLADE, SV8xxx",
website_warehouse: "Stores - CT",
default_material_request_type: "Purchase",
disabled: 0,
name: "BE106359"
......
}}

我的angular2代码迭代细节，但打印未定义的值，因此无法在我的HTML模板上获得任何值

@Injectable()
export class ProductsService  {
  getProductDetails() {
    return this.http.get("https://domain/api/resource/Item")
      .map(
      p => {
        let products = p.json().data;
            products.forEach(m =>
          this.http.get('https://domain/api/resource/Item/'+ m.name)
          .map(details=> details.json())
          .subscribe(details => details.data) // <-- get values when trying to console print out 
       );
      });
  }}

//calling service from component
export class ProductsComponent implements OnInit {
  products;

  constructor(private service: ProductsService) {
    this.service.getProductDetails().subscribe(products => this.products = products); // <---- console.log(products) print undefined value
  }}

Answer 1

这解决了我所需要的所有问题mergeMap

getProductDetails() {
    let Products: any[] = [];

    return this.http.get('https://domain/api/resource/Item')
      .map(res => res.json().data)
      .mergeMap(list => list)
      .mergeMap(name => {
        return this.http.get("https://domain/api/resource/Item/" + name['name'])
      })
      .map(res => {
        Products.push(res.json().data)
        { return Products; }
      })
  }

//then call it from my component
this.service.getProductDetails().subscribe(res=>this.products= res );

Angular2嵌套的http get请求

1 个答案: