Redis backed timelines in your app.
- store your timeline in Redis.
The simple way...
class Post < ActiveRecord::Base include Timeline::Track track :new_post end
By default, track fires in the
after_create callback of your model and uses
self as the object and
creator as the actor.
You can specify these options explicity...
class Comment < ActiveRecord::Base include Timeline::Track belongs_to :author, class_name: "User" belongs_to :post track :new_comment, actor: :author, followers: :post_participants, object: [:body], on: :update, target: :post delegate :participants, to: :post, prefix: true end
track accepts the following parameters...
the first param is the verb name.
The rest all fit neatly in an options hash.
on:[ActiveModel callback] You use it to specify whether you want the timeline activity created after a create, update or destroy. Default: :create
actor:[the method that specifies the object that took this action] In the above example, comment.author is this object. Default: :creator, so make sure this exists if you don't specify a method here
object:defaults to self, which is good most of the time. You can override it if you need to
target:[related to the
:objectmethod above. In the example this is the post related to the comment] default: nil
followers:[who should see this story in their timeline. This references a method on the actor] Defaults to the method
followersdefined by Timeline::Actor.
extra_fields:[accepts an array of method names that you would like to cache the value of in your timeline] Defaults to nil.
if:symbol or proc/lambda lets you put conditions on when to track.
Display a timeline
To retrieve a timeline for a user...
class User < ActiveRecord::Base include Timeline::Actor end
The timeline objects are just hashes that are extended by Hashie to provide method access to the keys.
user = User.find(1) user.timeline # => [<Timeline::Activity verb='new_comment' ...>]
Add to your Gemfile:
Or install it by hand:
gem install redis-timeline
Setup your redis instance. For a Rails app, something like this...
# in config/initializers/redis.rb Timeline.redis = "localhost:6379/timeline"
Original author: Felix Clack
(The MIT License)
Copyright (c) 2012 Felix Clack
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