需要单击两次才能更新服务器 - Angular2

时间:2017-03-08 17:55:05

标签: javascript json rest angular

我有一个json,在我第一次点击更新它的按钮时没有更新。有问题的按钮调用此功能:

recusaProposta(){
    this.propostaService.atualizaDisputa(this.disputa)
    .subscribe(
      res => this.disputa.propostas_realizadas++,
      error => console.log(error)
    );
}

现在,我第一次点击它时json上没有任何反应,但是如果我再次点击它会更新我想要的字段(disputa.propostas_realizadas

这是服务:

import {Injectable} from '@angular/core';
import {Http, Headers, Response, RequestOptions} from '@angular/http';
import {Component} from '@angular/core';
import {Observable} from 'rxjs/Rx';
import {DisputaPropostaComponent} from './disputas-proposta.component';
import 'rxjs/add/operator/map';

@Injectable()
export class DisputaPropostaService{

    contato:Object[] = [];
    name: string;
    headers:Headers;
    url: string = 'http://localhost:3004/disputa';

    constructor(private http: Http){}

    atualizaDisputa (body:any): Observable<DisputaPropostaComponent[]>{
        let bodyString = JSON.stringify(body); // Stringify payload
        let headers      = new Headers({ 'Content-Type': 'application/json' }); // ... Set content type to JSON
        let options       = new RequestOptions({ headers: headers }); // Create a request option
        return this.http.put(`${this.url}/${body['id']}`, body, options) // ...using post request
                         .map((res:Response) => res.json()) // ...and calling .json() on the response to return data
                         .catch((error:any) => Observable.throw(error.json().error || 'Ocorreu um erro em nosso servidor, tente novamente mais tarde')); //...errors if any
    }
}
你能帮助我吗?提前谢谢。

1 个答案:

答案 0 :(得分:0)

原因是在你的函数中你返回disputa.propostas_realizadas然后再将它增加1.用下面的代码替换你的函数,它应该可以工作。

recusaProposta(){
    this.propostaService.atualizaDisputa(this.disputa)
    .subscribe(
      res => ++this.disputa.propostas_realizadas,
      error => console.log(error)
    );
}