module ActiveRecord module Associations class AssociationProxy #:nodoc: alias_method :proxy_respond_to?, :respond_to? alias_method :proxy_extend, :extend instance_methods.each { |m| undef_method m unless m =~ /(^__|^nil\?|^proxy_respond_to\?|^proxy_extend|^send)/ } def initialize(owner, association_name, association_class_name, association_class_primary_key_name, options) @owner = owner @options = options @association_name = association_name @association_class = eval(association_class_name, nil, __FILE__, __LINE__) @association_class_primary_key_name = association_class_primary_key_name proxy_extend(options[:extend]) if options[:extend] reset end def reload reset load_target end def respond_to?(symbol, include_priv = false) proxy_respond_to?(symbol, include_priv) || (load_target && @target.respond_to?(symbol, include_priv)) end def loaded? @loaded end def loaded @loaded = true end def target @target end def target=(t) @target = t @loaded = true end protected def dependent? @options[:dependent] || false end def quoted_record_ids(records) records.map { |record| record.quoted_id }.join(',') end def interpolate_sql_options!(options, *keys) keys.each { |key| options[key] &&= interpolate_sql(options[key]) } end def interpolate_sql(sql, record = nil) @owner.send(:interpolate_sql, sql, record) end def sanitize_sql(sql) @association_class.send(:sanitize_sql, sql) end def extract_options_from_args!(args) @owner.send(:extract_options_from_args!, args) end private def method_missing(method, *args, &block) load_target @target.send(method, *args, &block) end def load_target if !@owner.new_record? || foreign_key_present begin @target = find_target if not loaded? rescue ActiveRecord::RecordNotFound reset end end @loaded = true if @target @target end # Can be overwritten by associations that might have the foreign key available for an association without # having the object itself (and still being a new record). Currently, only belongs_to present this scenario. def foreign_key_present false end def raise_on_type_mismatch(record) raise ActiveRecord::AssociationTypeMismatch, "#{@association_class} expected, got #{record.class}" unless record.is_a?(@association_class) end end end end