Angular 4.0 http put request

Question

I\'ve written a function to send a http put request to update some data but it says, that it is not recieving any data:

updateHuman(human: Human) {
    const         


        

Answer 1

Observables are lazy, you need to be subscribed to them for them to work and retrieve anything. Did you subscribe to your method? Example:

methodToUpdateHuman(human): void{
...
this.updateHuman(human).subscribe((response) => {
   //do something with the response
   console.log.("Response is: ", response);
},
(error) => {
   //catch the error
   console.error("An error occurred, ", error);
});
}

I suggest you read through the Angular Tour Of Heroses, it's based in angular 2 and most of the functionality is functional in angular 4, there is a section dedicated to http requests: https://angular.io/tutorial/toh-pt6