respond-framework/dist/db/utils/pick.js

create as fast you think

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = pick;
exports.pickAndCreate = void 0;
function pick(doc, project) {
  if (!doc) return;
  if (!project) return doc;
  if (Object.keys(project).length === 0) return doc;
  const {
    id,
    ...proj
  } = project;
  const values = Object.values(proj);
  const isExclude = values.every(field => field === 0);
  const isInclude = values.every(field => field === 1);
  if (!isExclude && !isInclude) {
    throw Error('respond: invalid mongo project: both exclusions + inclusions are provided, however only one kind is allowed');
  }
  if (id !== undefined) {
    proj.id = id; // id is the only field that can be the opposite of the rest
  } else {
    proj.id = 1;
  }
  return isExclude ? exclude(doc, proj) : include(doc, proj);
}
const exclude = (doc, project) => Object.keys(doc).reduce((acc, field) => {
  if (project[field] === 0) return acc;
  acc[field] = doc[field];
  return acc;
}, {});
const include = (doc, project) => Object.keys(project).reduce((acc, field) => {
  if (project[field] === 0) return acc; // could be id, which is allowed to be excluded in an include
  acc[field] = doc[field];
  return acc;
}, {});
const pickAndCreate = (doc, project, self) => {
  const picked = pick(doc, project);
  return picked ? self.super.create(picked) : undefined;
};
exports.pickAndCreate = pickAndCreate;