Ionic 3發布到REST API（Swagger）

Question

我想將文本發送到REST API（Swagger）。 該端點接受文本並返回JSON。

錯誤

未捕獲（承諾）：TypeError：未定義不是對象（評估“ this.RestProvider.post”）

我的REST提供商

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import { map, catchError } from 'rxjs/operators';

@Injectable()
export class RestProvider {
private apiUrl = 'https://xxxxx.com/xxxx/?language=DE'; 
  constructor(public http: HttpClient) {
    console.log('Hello RestProvider Provider');
  }

}

在home.ts中請求

getDiagnosis(data) {
    return new Promise((resolve, reject) => {
    this.RestProvider.post(this.apiUrl, data,{headers:{'Content-Type': 'text'}})
      .subscribe(data => {
        resolve(data);
      }, (err) => {
        reject(err);
      });
     }); 
}

Answer 1

您無法調用this.RestProvider.post中不包含的this.RestProvider.post。

在RestProvider類中定義一個getDiagnosis(data)方法，並從home.ts類中調用它。

RestProvider.ts

import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import { map, catchError } from 'rxjs/operators';

// Set Headers to post request
const httpOptions = {
  headers: new HttpHeaders(
    { 'Content-Type': 'text' },
  )
};

@Injectable()
export class RestProvider {
private apiUrl = 'https://xxxxx.com/xxxx/?language=DE'; 
  constructor(public http: HttpClient) {

  }

getDiagnosis(data): Observable<any> {
return this.http.post(this.apiUrl, data, httpOptions);
    }
}

home.ts

export class Home {
    constructor(private restProvider : RestProvider) {

    }

    getDiagnosis(data) {
        this.restProvider.getDiagnosis(data)
            .subscribe(response => {
                //Do whatever you want with response data
            });
    }
}