Class: Module
- Defined in:
- lib/active_support/dependencies.rb,
lib/active_support/module_attribute_accessors.rb
Overview
Extends the module object with module and instance accessors for class attributes, just like the native attr* accessors for instance attributes.
Direct Known Subclasses
Instance Method Summary collapse
-
#const_missing(class_id) ⇒ Object
Use const_missing to autoload associations so we don’t have to require_association when using single-table inheritance.
- #mattr_accessor(*syms) ⇒ Object
-
#mattr_reader(*syms) ⇒ Object
:nodoc:.
- #mattr_writer(*syms) ⇒ Object
-
#rails_original_const_missing ⇒ Object
Rename the original handler so we can chain it to the new one.
Instance Method Details
#const_missing(class_id) ⇒ Object
Use const_missing to autoload associations so we don’t have to require_association when using single-table inheritance.
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# File 'lib/active_support/dependencies.rb', line 186 def const_missing(class_id) if Object.const_defined?(:Controllers) and Object::Controllers.const_available?(class_id) return Object::Controllers.const_get(class_id) end begin require_dependency(class_id.to_s.demodulize.underscore) if Object.const_defined?(class_id) then return Object.const_get(class_id) else raise LoadError end rescue LoadError => e begin rails_original_const_missing(class_id) rescue Exception raise NameError.new("uninitialized constant #{class_id}").copy_blame!(e) end end end |
#mattr_accessor(*syms) ⇒ Object
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# File 'lib/active_support/module_attribute_accessors.rb', line 53 def mattr_accessor(*syms) mattr_reader(*syms) mattr_writer(*syms) end |
#mattr_reader(*syms) ⇒ Object
:nodoc:
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# File 'lib/active_support/module_attribute_accessors.rb', line 4 def mattr_reader(*syms) syms.each do |sym| class_eval <<-EOS if ! defined? @@#{sym.id2name} @@#{sym.id2name} = nil end def self.#{sym.id2name} @@#{sym} end def #{sym.id2name} @@#{sym} end def call_#{sym.id2name} case @@#{sym.id2name} when Symbol then send(@@#{sym}) when Proc then @@#{sym}.call(self) when String then @@#{sym} else nil end end EOS end end |
#mattr_writer(*syms) ⇒ Object
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# File 'lib/active_support/module_attribute_accessors.rb', line 31 def mattr_writer(*syms) syms.each do |sym| class_eval <<-EOS if ! defined? @@#{sym.id2name} @@#{sym.id2name} = nil end def self.#{sym.id2name}=(obj) @@#{sym.id2name} = obj end def self.set_#{sym.id2name}(obj) @@#{sym.id2name} = obj end def #{sym.id2name}=(obj) @@#{sym} = obj end EOS end end |
#rails_original_const_missing ⇒ Object
Rename the original handler so we can chain it to the new one
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# File 'lib/active_support/dependencies.rb', line 182 alias :rails_original_const_missing :const_missing |