Module: Workflow::Join::ActiveRecord

Includes:
PendingCallbacks, PendingTransitions
Defined in:
lib/workflow/join/active_record.rb,
lib/workflow/join/active_record/pending_callbacks.rb,
lib/workflow/join/active_record/pending_transitions.rb

Defined Under Namespace

Modules: PendingCallbacks, PendingTransitions

Constant Summary collapse

ENSURE_COLUMNS = 
lambda do |model, *columns|
  columns.reduce(true) do |memo, column|
    next memo if model.column_names.include?(column.to_s)

    ::ActiveRecord::Base.connection.execute(
      "ALTER TABLE #{model.table_name} ADD #{column} VARCHAR(255)"
    )
    false
  end
end

Class Method Summary collapse

Methods included from PendingCallbacks

#pending_callback!, #pending_callbacks, #pending_callbacks!, #pending_callbacks?

Methods included from PendingTransitions

#pending_transition!, #pending_transitions, #pending_transitions!, #pending_transitions?, #try_pending_transitions!

Class Method Details

.included(base) ⇒ Object 



21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
 
# File 'lib/workflow/join/active_record.rb', line 21

def self.included(base)
  base.singleton_class.send :define_method, :prepended do |model|
    fail LoadError, "This module might be included in ActiveRecord::Base instances only (#{base} given.)" \
      unless model < ::ActiveRecord::Base

    # unless ENSURE_COLUMNS.call(model, :workflow_pending_transitions, :workflow_pending_callbacks)
    #   fail LoadError, <<-MSG

    #     =======================================================================================
    #      This is an intended fail, next time the class is requested, it’ll be loaded properly!
    #      To avoid this one should explicitly specify columns:
    #         — workflow_pending_transitions,
    #         — workflow_pending_callbacks
    #      in all models, that are willing to use joined workflows.
    #     =======================================================================================

    #   MSG
    # end
  end
end