CODEWITHSUNDEEP
httpangularionic2observable
Mohan Gopi
Mohan Gopi

Reputation: 7724

HTTP observable returns undefined/null

i have created providers page and i am having my post and get request in it

here is my services which returns observable

post(url: string,data:any): Observable<any>{

   return this.http.post(this.configurator.restServerBaseUrl+url,data)
    .map((result:Response)=> {
      result.json()
    })
  }

here is my component code 

 submit(){
    this.rest.post('/validateUser',validateUserObj)
    .subscribe((result)=>{
      this.logger.debug("checking data of success " +JSON.stringify(result));

    });
  }
}

here my result is giving me undefined

in my services if i map like this it works fine .map((result:Response)=>result.json())

if i apply bracket i am getting undefined.

can some one help me in understand the observable i have checked in angula.io but i am feeling difficult to understand there

Upvotes: 1

Views: 1208

Answers (1)

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 658225

The short form returns the result of expression implicitly

(param) => expression;

The long form with brackets supports multiple statements but you have to explicitly return

(param) => { 
  let x = this.doSomething();
  return x; 
}

Upvotes: 3

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