diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/module/delegation.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/module/delegation.rb | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/delegation.rb b/activesupport/lib/active_support/core_ext/module/delegation.rb index 13f3894e6c..4310df3024 100644 --- a/activesupport/lib/active_support/core_ext/module/delegation.rb +++ b/activesupport/lib/active_support/core_ext/module/delegation.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require "set" require "active_support/core_ext/regexp" @@ -113,11 +115,8 @@ class Module # invoice.customer_address # => 'Vimmersvej 13' # # If the target is +nil+ and does not respond to the delegated method a - # +Module::DelegationError+ is raised, as with any other value. Sometimes, - # however, it makes sense to be robust to that situation and that is the - # purpose of the <tt>:allow_nil</tt> option: If the target is not +nil+, or it - # is and responds to the method, everything works as usual. But if it is +nil+ - # and does not respond to the delegated method, +nil+ is returned. + # +Module::DelegationError+ is raised. If you wish to instead return +nil+, + # use the <tt>:allow_nil</tt> option. # # class User < ActiveRecord::Base # has_one :profile @@ -174,7 +173,7 @@ class Module to = to.to_s to = "self.#{to}" if DELEGATION_RESERVED_METHOD_NAMES.include?(to) - methods.each do |method| + methods.map do |method| # Attribute writer methods only accept one argument. Makes sure []= # methods still accept two arguments. definition = /[^\]]=$/.match?(method) ? "arg" : "*args, &block" @@ -272,7 +271,15 @@ class Module if #{target}.respond_to?(method) #{target}.public_send(method, *args, &block) else - super + begin + super + rescue NoMethodError + if #{target}.nil? + raise DelegationError, "\#{method} delegated to #{target}, but #{target} is nil" + else + raise + end + end end end RUBY |