An alternative to Lodash omit, which allows you to omit a single property.

ES6OmitSingleProperty.ts

const omit = (keyToOmit: string, { [keyToOmit]: _, ...omittedPropObj } = {}) => omittedPropObj;

const objectFromFrontend = {
  _id: 5,
  data: {
    some: 1,
    useful: 2,
    data: 3
  }
}

const objectToInsertIntoDB = omit('_id', objectFromFrontend);

console.log(objectToInsertIntoDB)
/**
* {
*   data: {
*    some: 1,
*    useful: 2,
*    data: 3
*  }
* }
*/

console.log(objectFromFrontend)
/**
* {
*   _id: 5,
*   data: {
*    some: 1,
*    useful: 2,
*    data: 3
*  }
* }
*/