ruby - Rails on Heroku: session variables nil -

i've done lot of research , can't find similar questions/answers, appreciate help.

my app working great locally, when push heroku, chokes on session variables. specifically, throws nomethoderror nil:nilclass when try access attributes of object held in session. i've narrowed down session after switching params , having success. however, i'd prefer using session keeps code little cleaner.

i've poked around , seems happening every session object. quick context create new charge, new organization, , associate charge organization.

the protocol https (this checkout page) , these calls happening asynchronously via jquery, though i'm not sure if matters. rails 3.2. cedar/postgres on heroku. sqlite3/thin locally.

what's happening session on heroku?

production.rb

config.session_store :cookie_store, :key => '_my_app_session', :domain => :all 

application_controller.rb

...  helper_method :current_charge def current_charge   @_current_charge ||= session[:current_charge_id] &&   charge.find_by_id(session[:current_charge_id]) end  ... 

charges_controller.rb

def create   @charge = charge.new(params[:charge])   if @charge.save     session[:current_charge_id] = @charge.id   ... end 

organizations_controller.rb

def create   @organization = organization.new(params[:organization])   if @organization.save     @charge = current_charge     @charge.organization_id = @organization.id     @charge.save!   ... end 

cedar log (thrown on organizations_controller.rb)

nomethoderror (undefined method `organization_id=' nil:nilclass): 

when instantiate record using new, record doesn't persist database until saved, , no id assigned record until persisted.

in code:

def create   @charge = charge.new(params[:charge])   session[:current_charge_id] = @charge.id   ... end 

@charge.id nil @ point, , therefore won't have id. you'll need use create in charges_controller.rb give record id:

def create   @charge = charge.create(params[:charge])   session[:current_charge_id] = @charge.id   ... end 

or use existing code , add save before setting session key:

def create   @charge = charge.new(params[:charge])    @charge.save    session[:current_charge_id] = @charge.id   ... end