I am using Hobo 1.3.3 & Rails 3.0.19
I have a model device.rb for which I needed to track
-
a tech_status, and
-
an admin_status
using lifecycles.
As per Bryan’s ‘You can't have more than one Lifecycle in a model, …. you
can always create a child model to hold the second Lifecycle.’
I have tried to tackle this issue using the STI approach, and defined
-
the tech_status lifecycle in device.rb, and
-
the admin_status lifecycle in device_son.rb, as in the following code :
I am using Hobo 1.3.3 & Rails 3.0.19
I have a model device.rb for which I needed to track
-
a tech_status, and
-
an admin_status
using lifecycles.
As per Bryan’s ‘You can't have more than one Lifecycle in a model, …. you
can always create a child model to hold the second Lifecycle.’
I have tried to tackle this issue using the STI approach, and defined
-
the tech_status lifecycle in device.rb, and
-
the admin_status lifecycle in device_son.rb, as in the following code :
*class Device < ActiveRecord::Base*
*hobo_model # Don't put anything above this*
*..*
*# :tech_status lifecycle*
*lifecycle :state_field => :tech_status do*
*state :for_workshop, :default => true*
*state :all_ok,*
*:scrapped,*
*:deactivated*
*transition :complete, *
*{ :for_workshop => :all_ok },*
*:available_to => :technicians do*
*# Create new tech_status_change object ; this tracks tech_status history*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :all_ok,
:operator => acting_user )*
*# Save object;*
*@rtsc.save*
*end*
*transition :deactivate, *
*{ :for_workshop => :deactivated },*
*:available_to => :technicians do*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :deactivated,
:operator => acting_user )*
*@rtsc.save*
*end*
*transition :scrap, { :for_workshop => :scrapped },*
*:available_to => :technicians do*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :scrapped,
:operator => acting_user )*
*@rtsc.save*
*end*
*# The following :receive transitions get called programatically;*
*# For documented reasons, we lose access to acting_user in contained models
*
*# acting_user is only set on the model during a create or a *
*# save; it's available in the various validation methods, permission *
*# methods and callbacks, but not typically set outside that context*
*transition :receive, { :scrapped => :for_workshop },*
*:available_to => :all do*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :for_workshop,
:operator => acting_user )*
*@rtsc.save*
*end*
*transition :receive,*
*{ :deactivated => :for_workshop },*
*:available_to => :all do*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :for_workshop,
:operator => acting_user )*
*@rtsc.save*
*end*
*transition :receive, { :all_ok => :for_workshop },*
*:available_to => :all do*
*@rtsc = self.tech_status_changes.new( :new_tech_status => :for_workshop,
:operator => acting_user )*
*@rtsc.save*
*end*
*end*
…
and,
*class DeviceSon < Device *
*# This is a STI Model definition*
*# --- Lifecycles --- #*
*# :admin_status lifecycle*
*lifecycle :state_field => :admin_status do*
*state :undefined, :default => true*
*state :in_stock, # Device is in stock*
*:internal_asset, # Device capitalised for internal use*
*:sold, # Device sold to regular customer*
*:demo, # Device 'demo'ed from stock; device is issued in this state*
*:available, # Device available for loan or rent; device not issued in this
state*
*:rented, # Device rented; device is issued in this state*
*:loaned # Device loaned; device is issued in this state*
*# New device => stock; callable by :accountants*
*transition :to_stock, *
*{ :undefined => :in_stock },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :in_stock,
:operator => acting_user )*
*@dasc.save*
*end*
*# Stock => capitalisation for internal use; callable by :accountants*
*transition :capitalise_internal, *
*{ :in_stock => :internal_asset },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status =>
:internal_asset, :operator => acting_user )*
*@dasc.save*
*end*
*# Stock => capitalisation for rental/loan use; callable by :accountants*
*transition :capitalise_for_rental, *
*{ :in_stock => :available },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :available,
:operator => acting_user )*
*@dasc.save*
*end*
*# Trade-in sold device for internal use; callable by :accountants*
*transition :trade_in_internal, *
*{ :sold => :internal_asset },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status =>
:internal_asset, :operator => acting_user )*
*@dasc.save*
*end*
*# Trade-in sold device for rental/loan use; callable by :accountants*
*transition :trade_in_for_rental, *
*{ :sold => :available },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :available,
:operator => acting_user )*
*@dasc.save*
*end*
*# Sell device from stock; callable by :accountants*
*transition :sell, *
*{ :in_stock => :sold },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :sold,
:operator => acting_user )*
*@dasc.save*
*end*
*# Issue device from stock for demonstration purposes; callable by
:coordinators*
*transition :issue_demo, *
*{ :in_stock => :demo },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :demo,
:operator => acting_user )*
*@dasc.save*
*end*
*# Issue device for rental; callable by :coordinators*
*transition :issue_rent, *
*{ :available => :rented },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :rented,
:operator => acting_user )*
*@dasc.save*
*end*
*# Issue device for loan; callable by :coordinators*
*transition :issue_loan, *
*{ :available => :loaned },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :loaned,
:operator => acting_user )*
*@dasc.save*
*end*
*# Receive device from loan; callable by :coordinators*
*transition :return, *
*{ :loaned => :available },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :available,
:operator => acting_user )*
*@dasc.save*
*end*
*# Receive device from rent; callable by :coordinators*
*transition :return, *
*{ :rented => :available },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :available,
:operator => acting_user )*
*@dasc.save*
*end*
*# Return demo device back to stock; callable by :coordinators*
*transition :return, *
*{ :demo => :in_stock },*
*:available_to => :all do*
*@dasc = self.admin_status_changes.new( :new_admin_status => :in_stock,
:operator => acting_user )*
*@dasc.save*
*end*
*end*
…
The above migrates properly, the lifecycle state field is created in the
parent model but I cannot call a transition in the admin_status lifecycle !!
In fact, in the console(using an instance variable my_dev_son, of class
DevSon) :
my_dev_son.lifecycle.class # => Device::Lifecycle,
I was expecting DeviceSon::Lifecycle.
I got this to work using a rather inelegant :has_one => :device_son &
belongs_to approach, but this uses two tables of course; it just does not
feel right !!!
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