diff options
Diffstat (limited to 'activesupport/lib')
| -rw-r--r-- | activesupport/lib/active_support/dependencies.rb | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb index bb22357c9b..77cab6f08d 100644 --- a/activesupport/lib/active_support/dependencies.rb +++ b/activesupport/lib/active_support/dependencies.rb @@ -168,16 +168,30 @@ module ActiveSupport #:nodoc: end end - def const_missing(const_name, nesting = nil) + def const_missing(const_name) klass_name = name.presence || "Object" - unless nesting - # We'll assume that the nesting of Foo::Bar is ["Foo::Bar", "Foo"] - # even though it might not be, such as in the case of - # class Foo::Bar; Baz; end - nesting = [] - klass_name.to_s.scan(/::|$/) { nesting.unshift $` } - end + # Since Ruby does not pass the nesting at the point the unknown + # constant triggered the callback we cannot fully emulate constant + # name lookup and need to make a trade-off: we are going to assume + # that the nesting in the body of Foo::Bar is [Foo::Bar, Foo] even + # though it might not be. Counterexamples are + # + # class Foo::Bar + # Module.nesting # => [Foo::Bar] + # end + # + # or + # + # module M::N + # module S::T + # Module.nesting # => [S::T, M::N] + # end + # end + # + # for example. + nesting = [] + klass_name.to_s.scan(/::|$/) { nesting.unshift $` } # If there are multiple levels of nesting to search under, the top # level is the one we want to report as the lookup fail. |