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, on: :update, actor: :author, target: :post, object: [:body] followers: :post_participants 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.
merge_similar:[allow merge similar feed as one] For example, user upload some photos use multi uploader feature, you may need only on feed in timeline, so you need turn this on, then merged item will fix
objectas an Array type. Default: false
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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