CODEWITHSUNDEEP
ruby-on-railsrubystates
Mel
Mel

Reputation: 2683

Rails 4 - Statesman - no method error

I have a model called organisation request. I have put statesman files on this model.

I have a couple of other models which I have also added statesman to and those work fine.

When I try to use this state machine, I get errors which say:

o = OrganisationRequest.last
  OrganisationRequest Load (5.6ms)  SELECT  "organisation_requests".* FROM "organisation_requests"  ORDER BY "organisation_requests"."id" DESC LIMIT 1
 => #<OrganisationRequest id: 1, profile_id: 40, organisation_id: 1, created_at: "2016-07-30 21:38:25", updated_at: "2016-07-30 21:38:25"> 
2.3.0p0 :137 > o.current_state
NoMethodError: undefined method `current_state' for #<OrganisationRequest:0x007f920bb21110>

Can anyone see why?

 class OrganisationRequest < ActiveRecord::Base
        include Statesman::Adapters::ActiveRecordQueries




  # --------------- associations
  belongs_to :profile
    belongs_to :organisation
    has_many :organisation_request_transitions, autosave: false


  # --------------- scopes


  # --------------- validations


  # --------------- class methods

  def state_machine
    @state_machine ||= OrganisationRequestStateMachine.new(self, transition_class: OrganisationRequestTransition)
  end

   delegate :can_transition_to?, :transition_to!, :transition_to, :current_state,
           to: :state_machine




  # --------------- callbacks

  OrganisationRequest.after_transition(from: :requested, to: :approved) do |organisation_request, profile|
    profile.organisation_id.update_attributes!(organisation_id: matching_organisation.id)
      # add a mailer to send to the  user that is added to the org
  end

    OrganisationRequest.after_transition(from: :approved, to: :removed) do |organisation_request, profile|
    profile.organisation_id.update_attributes!(organisation_id: nil)
    end


  # --------------- instance methods

  # --------------- private methods

  private

    def self.transition_class
      OrganisationRequestTransition
    end

    def self.initial_state
      :requested
    end

end

Upvotes: 2

Views: 278

Answers (3)

Mel
Mel

Reputation: 2683

There were two errors in my setup:

The first was that I incorrectly named the class name as a variable in the has many association - it should be:

has_many :transitions, class_name: 'OrganisationRequestTransition', autosave: false

The second was that I had the after_transition callbacks in the organisation request model - they should be in the organisation request state machine.

Upvotes: 1

sameera207
sameera207

Reputation: 16629

I think as per the stateman gem it should be 

<object>.state_machine.current_state

Eg

o = OrganisationRequest.last
o.state_machine.current_state

not

o.current_state

HTH

Upvotes: 0

Tan Nguyen
Tan Nguyen

Reputation: 3376

I think you didn't pass association_name into the function. Give it a try (not tested):

def state_machine
  @state_machine ||= OrderStateMachine.new(self, transition_class: OrderTransition, association_name: :organisation_request_transitions)
end

Upvotes: 0

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