Module: MultipleTableInheritance::Child::Base::ClassMethods

Defined in:
lib/multiple_table_inheritance/child/base.rb

Instance Method Summary collapse

Instance Method Details

#inherits_from(association_name, options = {}) ⇒ Object 



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# File 'lib/multiple_table_inheritance/child/base.rb', line 14

def inherits_from(association_name, options={})
  # Standardize options, and remove those that should not affect the belongs_to relationship
  options = Base::default_options.merge(options.to_options)
  inherit_methods = options.delete(:methods)
  
  @inherited_attribute_methods_mutex = Mutex.new
  
  extend AttributeMethods, FinderMethods, SharedMethods
  include InstanceMethods, SharedMethods
  include DelegateMethods if inherit_methods
  
  # Set association references.
  self.parent_association_name = association_name.to_sym
  self.primary_key = "#{parent_association_name}_id"
  
  # Ensure parent association is always returned.
  define_method("#{parent_association_name}_with_autobuild") do
    send("#{parent_association_name}_without_autobuild") || send("build_#{parent_association_name}")
  end
  
  # Bind relationship, handle validation, and save properly.
  belongs_to parent_association_name, options
  alias_method_chain parent_association_name, :autobuild
  before_validation :set_association_subtype
  validate :parent_association_must_be_valid
  before_save :parent_association_must_be_saved
  
  # denote that the association methods have not been built
  @loaded = false
end

#parent_association_class ⇒ Object 



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# File 'lib/multiple_table_inheritance/child/base.rb', line 45

def parent_association_class
  @parent_association_class ||= begin
    reflection = create_reflection(:belongs_to, parent_association_name, {}, self)
    reflection.klass
  end
end