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module ActiveRecord
module Associations
class AssociationProxy #:nodoc:
alias_method :proxy_respond_to?, :respond_to?
instance_methods.each { |m| undef_method m unless m =~ /(^__|^nil\?|^proxy_respond_to\?|^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)
@association_class_primary_key_name = association_class_primary_key_name
reset
end
def method_missing(symbol, *args, &block)
load_target
@target.send(symbol, *args, &block)
end
def respond_to?(symbol, include_priv = false)
load_target
proxy_respond_to?(symbol, include_priv) || @target.respond_to?(symbol, include_priv)
end
def loaded?
@loaded
end
private
def load_target
unless @owner.new_record?
begin
@target = find_target if not loaded?
rescue ActiveRecord::RecordNotFound
reset
end
end
@loaded = true
@target
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
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