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Cache Module#parent_name

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This commit is contained in:
Jeremy Kemper 2008-07-09 19:43:38 -07:00
parent ae9356ae9e
commit 269c6c6bcf
1 changed files with 17 additions and 6 deletions
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17
activesupport/lib/active_support/core_ext/module/introspection.rb
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@ -1,4 +1,14 @@
class Module
# Returns the name of the module containing this one.
#
# p M::N.parent_name # => "M"
def parent_name
unless defined? @parent_name
@parent_name = name =~ /::[^:]+\Z/ ? $`.freeze : nil
end
@parent_name
end
# Returns the module which contains this one according to its name.
#
# module M
@ -16,8 +26,7 @@ class Module
# p Module.new.parent # => Object
#
def parent
parent_name = name.split('::')[0..-2] * '::'
parent_name.empty? ? Object : parent_name.constantize
parent_name ? parent_name.constantize : Object
end
# Returns all the parents of this module according to its name, ordered from
@ -35,11 +44,13 @@ class Module
#
def parents
parents = []
parts = name.split('::')[0..-2]
if parent_name
parts = parent_name.split('::')
until parts.empty?
parents << (parts * '::').constantize
parts.pop
end
end
parents << Object unless parents.include? Object
parents
end