Sha256: e1e8114c052cde7d68ce6c29c2b4997d7165fa52d19a743be9fa56b54dd71b9f
Contents?: true
Size: 1.92 KB
Versions: 7
Compression:
Stored size: 1.92 KB
Contents
module ActiveRecord
class Base
def self.reflect_on_all_associations
base_class.instance_eval { @associations ||= superclass.instance_eval { (@associations && @associations.dup) || [] } }
end
def self.reflect_on_association(attribute)
reflect_on_all_associations.detect { |association| association.attribute == attribute }
end
end
module Associations
class AssociationReflection
attr_reader :association_foreign_key
attr_reader :attribute
attr_reader :macro
def initialize(owner_class, macro, name, options = {})
owner_class.reflect_on_all_associations << self
@owner_class = owner_class
@macro = macro
@options = options
@klass_name = options[:class_name] || (collection? && name.camelize.gsub(/s$/,"")) || name.camelize
if @klass_name < ActiveRecord::Base
@klass = @klass_name
@klass_name = @klass_name.name
end rescue nil
@association_foreign_key = options[:foreign_key] || (macro == :belongs_to && "#{name}_id") || "#{@owner_class.name.underscore}_id"
@attribute = name
end
def inverse_of
unless @options[:through] or @inverse_of
inverse_association = klass.reflect_on_all_associations.detect do | association |
association.association_foreign_key == @association_foreign_key and association.klass.base_class == @owner_class.base_class
end
raise "Association #{@owner_class}.#{attribute} (foreign_key: #{@association_foreign_key}) has no inverse in #{@klass_name}" unless inverse_association
@inverse_of = inverse_association.attribute
end
@inverse_of
end
def klass
@klass ||= Object.const_get(@klass_name)
end
def collection?
[:has_many].include? @macro
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems