Module: Zena::Acts::Enrollable::ModelMethods

Included in:
Node
Defined in:
lib/zena/acts/enrollable.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/zena/acts/enrollable.rb', line 14

def self.included(base)
  class << base
    attr_accessor :loaded_role_properties
    attr_accessor :declared_node_contexts, :declared_node_contexts_proc

    def loaded_role_properties
      @loaded_role_properties ||= {}
    end

    # Declare a safe context resulting in a (virtual) sub-class of Node. This method
    # ensures that the returned class will load the proper virtual Class during
    # runtime.
    def safe_node_context(methods_hash)
      methods_hash.each do |key, opts|
        safe_method key => Proc.new {|h, r, s| {:method => key, :class => VirtualClass[opts], :nil => true}}
      end
    end
  end

  base.class_eval do
    attr_accessor :loaded_role_properties

    def loaded_role_properties
      @loaded_role_properties ||= {}
    end

    before_validation  :prepare_roles
    after_save  :update_roles
    after_destroy :destroy_nodes_roles
    has_and_belongs_to_many :roles, :class_name => '::Role'
    safe_context :roles  => {:class => [Role], :method => 'assigned_roles'}

    property do |p|
      p.serialize :cached_role_ids, Array
    end
  end
end

Instance Method Details

#assigned_roles ⇒ Object 



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# File 'lib/zena/acts/enrollable.rb', line 66

def assigned_roles
  return nil unless role_ids = self.prop['cached_role_ids']
  roles = (schema.sorted_roles || []).select do |role|
    role_ids.include?(role.id)
  end
  roles.empty? ? nil : roles
end

#has_role?(role_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zena/acts/enrollable.rb', line 52

def has_role?(role_id)
  if role_id.kind_of?(Fixnum)
    (cached_role_ids || []).include?(role_id)
  else
    super
  end
end

#zafu_possible_roles ⇒ Object 



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# File 'lib/zena/acts/enrollable.rb', line 60

def zafu_possible_roles
  # Only select database stored roles
  roles = virtual_class.sorted_roles.select {|r| r.id && r.class == Role }
  roles.empty? ? nil : roles
end