The Angular http.post function seems to be returning null responses consistently, without any actual data being received

Question

The Angular http.post function seems to be returning null responses consistently, without any actual data being received

When making a post call in Angular using Http.post, I am sending jsonData as a parameter with the following formatted data. However, every time I receive a response as null. Could you please review my code and let me know if there are any mistakes? Here is a sample of the code I have tried:

let jsondataItems :any =[];

var jsonData = [
    {
        "empId": 11234,
        "salary": "98763",
        "test1id": "9897989",
        "test2id": "657453",
        "test3id": "4456",
        "month": "AUG-19"
    }]

this.http
      .post<empData>(url, jsonData)
      .subscribe((res) => {
        this.jsondataItems = res;
        console.log("res" + this.jsondataItems); // receiving null
        console.log("res" + JSON.stringify(this.jsondataItems)); // receiving null
        console.log("Processed successfully!!!"); // console -- working
      });
  }



interface empData {
  empId: number; //1234
  salary: string; //"3456"
  test1id: string; //""5678"
  test2id:string; //"5643"
  test3id:string; // "4533"
  month: string; //"JAN-20"
}

javascript angular typescript

Answer 1

Answer №1

Below is a suggested solution:

 import { HttpHeaders } from '@angular/common/http';
        
        const httpOptions = {
          headers: new HttpHeaders({
            'Content-Type':  'application/json'
          })
        };
   
    let jsonDataItems :any =[];
    
    var jsonData = [
        {
            "empId": 11234,
            "salary": "98763",
            "test1id": "9897989",
            "test2id": "657453",
            "test3id": "4456",
            "month": "AUG-19"
        }]
    
    this.http
          .post<empData>(url, jsonData,httpOptions)
          .subscribe((res) => {
            this.jsonDataItems = res;
            console.log("res" + this.jsonDataItems);
            console.log("res" + JSON.stringify(this.jsonDataItems));
            console.log("Processed successfully!!!"); 
          });
      }
    
    
    
    interface empData {
      empId: number;
      salary: string; 
      test1id: string; 
      test2id:string; 
      test3id:string; 
      month: string; 
    }

You can use the same http options, just include the observe: response. The header should be HttpHeaders from the http client library, for example: headers: new HttpHeaders().set('Content-Type', 'application/x-www-form-urlencoded').

Answer 2

Below is a suggested solution:

 import { HttpHeaders } from '@angular/common/http';
        
        const httpOptions = {
          headers: new HttpHeaders({
            'Content-Type':  'application/json'
          })
        };
   
    let jsonDataItems :any =[];
    
    var jsonData = [
        {
            "empId": 11234,
            "salary": "98763",
            "test1id": "9897989",
            "test2id": "657453",
            "test3id": "4456",
            "month": "AUG-19"
        }]
    
    this.http
          .post<empData>(url, jsonData,httpOptions)
          .subscribe((res) => {
            this.jsonDataItems = res;
            console.log("res" + this.jsonDataItems);
            console.log("res" + JSON.stringify(this.jsonDataItems));
            console.log("Processed successfully!!!"); 
          });
      }
    
    
    
    interface empData {
      empId: number;
      salary: string; 
      test1id: string; 
      test2id:string; 
      test3id:string; 
      month: string; 
    }

You can use the same http options, just include the observe: response. The header should be HttpHeaders from the http client library, for example: headers: new HttpHeaders().set('Content-Type', 'application/x-www-form-urlencoded').

The Angular http.post function seems to be returning null responses consistently, without any actual data being received

Answer №1

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