create-new-object.js

const createObject=(custom_schema,missingKeys,data)=>{
  const newObj=Object.create({});
  // add available keys
  for(let key of Object.keys(custom_schema)){
    const k=custom_schema[key];
    newObj[k]=data[key];
  }
  // add missing keys
  for(let k of missingKeys){
    newObj[k]='';
  }
  return _.omitBy(newObj, _.isUndefined);
}