nido

Nido

Structured keys helper.

Description

If you are familiar with databases like Redis and libraries like Ohm you already know how important it is to craft the keys that will hold the data.

>> redis = Redis.new
>> redis.sadd("event:3:attendees", "Albert")
>> redis.smembers("event:3:attendees")
=> ["Albert"]

It is a design pattern in key-value databases to use the key to simulate structure, and you can read more about this in the case study for a Twitter clone.

Nido helps you generate those keys by providing chainable namespaces:

>> r = Redis.new
>> event = Nido.new("event")
>> r.sadd(event[3][:attendees], "Albert")
>> r.smembers(event[3][:attendees])
=> ["Albert"]

Usage

To create a new namespace:

>> ns = Nido.new("foo")
=> "foo"

>> ns["bar"]
=> "foo:bar"

>> ns["bar"]["baz"]["qux"]
=> "foo:bar:baz:qux"

And you can use any object as a key, not only strings:

>> ns[:bar][42]
=> "foo:bar:42"

In a more realistic tone, lets assume you are working with Redis and dealing with events:

>> events = Nido.new("events")
=> "events"

>> id = r.incr(events[:id])
=> 1

>> r.sadd(events[id][:attendees], "Albert")
=> "OK"

>> meetup = events[id]
=> "events:1"

>> r.smembers(meetup[:attendees])
=> ["Albert"]

Installation

$ gem install nido