Search by Id fails

[Sowmya-Sukhanand]

Hi iam trying ti implement your search concept in my project.Iam searching an order detail by giving the id.Iam having no error but as soon as i enter the id an search no result is shown,in other words it is undefined.

function tht gives the search by id result:
search(id: number) {

let value= this.getAll().pipe(map((all: any) => {
   all.find(e => e.order_id === id);
}));
console.log(value);
return value;

}