Question

41

Remove fields from typescript interface object

rated 0 times [ 48] [ 7] / answers: 1 / hits: 16876 / 7 Years ago, fri, may 26, 2017, 12:00:00

I am getting a json response and storing it in mongodb, however the fields that I don't need are also getting in to the database, is there anyway to strip the uneseccary fields?

interface Test{

    name:string

};

const temp :Test = JSON.parse('{ name:someName,age:20 }') as Test;

console.log(temp);

output :

{ name: 'someName', age: 20 }

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cristinadomoniquel

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answered 7 Years ago nikhilh · Accepted Answer

You can use a function that picks certain properties from a given object:

function pick<T, K extends keyof T>(obj: T, ...keys: K[]): Pick<T, K> {

    const copy = {} as Pick<T, K>;



    keys.forEach(key => copy[key] = obj[key]);



    return copy;

}

Then:

let obj = { name: someName, age: 20 };

let copy = pick(obj, name) as Test;

console.log(copy); // { name: someName }