modifyjs

Modify your objects with a mongo like syntax. This is mostly forked code of a modify function of Meteor's brilliant minimongo package, changed to work without Meteor context, and included nice, readable tests based on a mongodb documentation.

Usage

The usage is shown in the src/modify.test.js file, but to show a simple example:

import modify from 'modifyjs';
  
const myObject = { _id: 1, scores: [ 0, 2, 5, 5, 1, 0 ] };

const updatedObject = modify(myObject, {$pullAll: {scores: [0, 5]}});

const expectedObject = {_id: 1, scores: [2, 1]};
expect(updatedObject).toEqual(expectedObject);

Installation

npm install modifyjs

Implemented:

$min
  ✓ updates a field when the passed value is lower than an existing one (3ms)
  ✓ doesn't update a field when the passed value is higher than an existing one
$max
  ✓ updates a field when the passed value is higher than an existing one
  ✓ doesn't update a field when the passed value is lower than an existing one (1ms)
$inc
  ✓ can increment with positive and negative values at the same time
$set
  ✓ sets top-level fields (1ms)
  ✓ sets fields in embedded documents (1ms)
  ✓ sets elements in arrays
$unset
  ✓ deletes a particular field (1ms)
$push
  ✓ appends a value to an array
  ✓ appends multiple values to an array (1ms)
$pushAll
  ✓ appends multiple values to an array without $each
$addToSet
  ✓ appends array with an array
  ✓ adds element to an array if element doesn't already exist (1ms)
  ✓ doesn't add an element to the array if it does already exists
  ✓ adds multiple values to the array field with $each modifier, omitting existing ones
$pop
  ✓ removes the first element from an array (1ms)
  ✓ removes the last item of an array
$pullAll
  ✓ removes all instances of the specified values from an existing array (1ms)
$rename
  ✓ updates the name of a field

Not implemented yet:

```

$currentDate
$pull (but $pullAll works)
$push with $sort modifier

```