diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext')
4 files changed, 84 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb index 3b22e8b4f9..f3d06ecb2f 100644 --- a/activesupport/lib/active_support/core_ext/array/conversions.rb +++ b/activesupport/lib/active_support/core_ext/array/conversions.rb @@ -39,10 +39,10 @@ class Array # # Blog.all.to_formatted_s # => "First PostSecond PostThird Post" # - # Adding in the <tt>:db</tt> argument as the format yields a prettier - # output: + # Adding in the <tt>:db</tt> argument as the format yields a comma separated + # id list: # - # Blog.all.to_formatted_s(:db) # => "First Post,Second Post,Third Post" + # Blog.all.to_formatted_s(:db) # => "1,2,3" def to_formatted_s(format = :default) case format when :db diff --git a/activesupport/lib/active_support/core_ext/module.rb b/activesupport/lib/active_support/core_ext/module.rb index 9fed346b7c..f399fce410 100644 --- a/activesupport/lib/active_support/core_ext/module.rb +++ b/activesupport/lib/active_support/core_ext/module.rb @@ -8,4 +8,5 @@ require 'active_support/core_ext/module/delegation' require 'active_support/core_ext/module/synchronization' require 'active_support/core_ext/module/deprecation' require 'active_support/core_ext/module/remove_method' -require 'active_support/core_ext/module/method_names'
\ No newline at end of file +require 'active_support/core_ext/module/method_names' +require 'active_support/core_ext/module/qualified_const'
\ No newline at end of file diff --git a/activesupport/lib/active_support/core_ext/module/qualified_const.rb b/activesupport/lib/active_support/core_ext/module/qualified_const.rb new file mode 100644 index 0000000000..d1a0ee2f83 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/module/qualified_const.rb @@ -0,0 +1,64 @@ +require 'active_support/core_ext/string/inflections' + +#-- +# Allows code reuse in the methods below without polluting Module. +#++ +module QualifiedConstUtils + def self.raise_if_absolute(path) + raise NameError, "wrong constant name #$&" if path =~ /\A::[^:]+/ + end + + def self.names(path) + path.split('::') + end +end + +## +# Extends the API for constants to be able to deal with qualified names. Arguments +# are assumed to be relative to the receiver. +# +#-- +# Qualified names are required to be relative because we are extending existing +# methods that expect constant names, ie, relative paths of length 1. For example, +# Object.const_get("::String") raises NameError and so does qualified_const_get. +#++ +class Module + if method(:const_defined?).arity == 1 + def qualified_const_defined?(path) + QualifiedConstUtils.raise_if_absolute(path) + + QualifiedConstUtils.names(path).inject(self) do |mod, name| + return unless mod.const_defined?(name) + mod.const_get(name) + end + return true + end + else + def qualified_const_defined?(path, search_parents=true) + QualifiedConstUtils.raise_if_absolute(path) + + QualifiedConstUtils.names(path).inject(self) do |mod, name| + return unless mod.const_defined?(name, search_parents) + mod.const_get(name) + end + return true + end + end + + def qualified_const_get(path) + QualifiedConstUtils.raise_if_absolute(path) + + QualifiedConstUtils.names(path).inject(self) do |mod, name| + mod.const_get(name) + end + end + + def qualified_const_set(path, value) + QualifiedConstUtils.raise_if_absolute(path) + + const_name = path.demodulize + mod_name = path.deconstantize + mod = mod_name.empty? ? self : qualified_const_get(mod_name) + mod.const_set(const_name, value) + end +end diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb index fd91b3cacb..1e57b586d9 100644 --- a/activesupport/lib/active_support/core_ext/string/inflections.rb +++ b/activesupport/lib/active_support/core_ext/string/inflections.rb @@ -117,10 +117,25 @@ class String # # "ActiveRecord::CoreExtensions::String::Inflections".demodulize # => "Inflections" # "Inflections".demodulize # => "Inflections" + # + # See also +deconstantize+. def demodulize ActiveSupport::Inflector.demodulize(self) end + # Removes the rightmost segment from the constant expression in the string. + # + # "Net::HTTP".deconstantize # => "Net" + # "::Net::HTTP".deconstantize # => "::Net" + # "String".deconstantize # => "" + # "::String".deconstantize # => "" + # "".deconstantize # => "" + # + # See also +demodulize+. + def deconstantize + ActiveSupport::Inflector.deconstantize(self) + end + # Replaces special characters in a string so that it may be used as part of a 'pretty' URL. # # ==== Examples |