Module: Workflow::Adapter::ActiveRecord::Scopes

Defined in:
lib/workflow/adapters/active_record.rb

Overview

This module will automatically generate ActiveRecord scopes based on workflow states. The name of each generated scope will be something like ‘with_<state_name>_state`

Examples:

Article.with_pending_state # => ActiveRecord::Relation

Example above just adds ‘where(:state_column_name => ’pending’)‘ to AR query and returns ActiveRecord::Relation.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(object) ⇒ Object 



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# File 'lib/workflow/adapters/active_record.rb', line 49

def self.extended(object)
  class << object
    alias_method :workflow_without_scopes, :workflow unless method_defined?(:workflow_without_scopes)
    alias_method :workflow, :workflow_with_scopes
  end
end

Instance Method Details

#workflow_with_scopes(&specification) ⇒ Object 



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# File 'lib/workflow/adapters/active_record.rb', line 56

def workflow_with_scopes(&specification)
  workflow_without_scopes(&specification)
  states     = workflow_spec.states.values
  eigenclass = class << self; self; end

  states.each do |state|
    # Use eigenclass instead of `define_singleton_method`
    # to be compatible with Ruby 1.8+
    eigenclass.send(:define_method, "with_#{state}_state") do
      where("#{table_name}.#{self.workflow_column.to_sym} = ?", state.to_s)
    end
  end
end