How to use outside of controller?

[olimart]

Hi, Thanks for the great work. I'm wondering if we could track event from a service object. I'm calling the service in my controller and it looks like this.

class RackTracker
  include Rack::Tracker::Controller

  def call(event, opts = {})
    tracker do |t|
      t.facebook_pixel :track, { type: event, options: opts }
    end
  end
end

However, it is raising the following error:

undefined local variable or method `env' for #<RackTracker:0x00007fb3796d3f88 @event="PageView", @options={}>

I guess I need to pass somehow current environment but how? Thanks

[olimart]

@DonSchado @bumi any suggestion? Thanks

[bumi]

Heja,

as rack-tracker uses the rack env hash your service class would need to have access to that object. So somehow you would need to pass it in from the rails controller.

I've never used it, but something like this could work:

class RackTracker
  include Rack::Tracker::Controller
  attr_accessor :env 

  def initialize(env)
    @env = env
  end 

  def call(event, opts = {})
    tracker do |t|
      t.facebook_pixel :track, { type: event, options: opts }
    end
  end
end

and in the controller:

  RackTracker.new(request.env).call(...)

You can also access the env hash directly (without including the Rack::Tracker::Controller) as described here (end)

[olimart]

Thanks for the explanation. I’ll guve it a try. Thanks a lot

Le mer. 17 oct. 2018 à 09:15, Michael Bumann notifications@github.com a écrit :

Heja,

as rack-tracker uses the rack env https://www.rubydoc.info/github/rack/rack/master/file/SPEC#label-The+Environment hash your service class would need to have access to that object. So somehow you would need to pass it in from the rails controller.

I've never used it, but something like this could work:

class RackTracker include Rack::Tracker::Controller attr_accessor :env

def initialize(env) @env = env end

def call(event, opts = {}) tracker do |t| t.facebook_pixel :track, { type: event, options: opts } end endend

and in the controller:

RackTracker.new(request.env).call(...)

You can also access the env hash directly (without including the Rack::Tracker::Controller) as described here https://github.com/railslove/rack-tracker#sinatra--rack (end)

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[bumi]

great, please report how you've solved it and close this issue if it works. and maybe it is something that should be added to the readme? (a PR would be appreciated! ;)) thanks!

[olimart]

Thanks @bumi I haven't had the chance yet to make the change but appreciate your help.