https://github.com/peerlibrary/meteor-data-lookup

Reactively lookup a field in the object
https://github.com/peerlibrary/meteor-data-lookup

meteor meteor-package

Last synced: about 1 month ago
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Reactively lookup a field in the object

• Host: GitHub
• URL: https://github.com/peerlibrary/meteor-data-lookup
• Owner: peerlibrary
• License: bsd-3-clause
• Created: 2015-12-26T11:55:49.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2019-09-20T04:20:35.000Z (over 5 years ago)
• Last Synced: 2024-11-09T06:06:03.363Z (3 months ago)
• Topics: meteor, meteor-package
• Language: CoffeeScript
• Homepage: https://atmospherejs.com/peerlibrary/data-lookup
• Size: 4.88 KB
• Stars: 2
• Watchers: 6
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
data lookup

===========

This Meteor smart package provides a reactive lookup of a field in the object.

It matches the behavior of the lookup in Spacebars, so `{{foo.bar}}` resolves

the same as `DataLookup.get(dataContext, 'foo.bar')`.

Adding this package to your [Meteor](http://www.meteor.com/) application adds `DataLookup` class

into the global scope.

Both client and server side.

Installation

------------

```

meteor add peerlibrary:data-lookup

```

API

---

`DataLookup` provides the following static methods:

* `lookup(obj, path)` – resolves the value by traversing the `obj` object using the `path`; if `path` is

  a string, it is first split on `.`; if a value is not found, `undefined` is returned; if any value on

  path is a function, it is first called

* `get(obj, path, equalsFunc)` - same as `lookup`, but if called inside a reactive computation, it uses

  [ComputedField](https://github.com/peerlibrary/meteor-computed-field) to minimize invalidations so that the

  reactive computation is invalided only when the value looked up itself changes, and not every time the input object

  changes; you can use `equalsFunc` to use a different equality function to determine when the value has changed