Class: Module

Inherits:
Object show all
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

Dependencies::LoadingModule

Instance Method Summary collapse

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 177

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
    raise NameError.new("uninitialized constant #{class_id}").copy_blame!(e)
  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


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# File 'lib/active_support/module_attribute_accessors.rb', line 4

def mattr_reader(*syms)
  syms.each do |sym|
    class_eval "if ! defined? @@\#{sym.id2name}\[email protected]@\#{sym.id2name} = nil\nend\n\ndef self.\#{sym.id2name}\[email protected]@\#{sym}\nend\n\ndef \#{sym.id2name}\[email protected]@\#{sym}\nend\n\ndef call_\#{sym.id2name}\ncase @@\#{sym.id2name}\nwhen Symbol then send(@@\#{sym})\nwhen Proc   then @@\#{sym}.call(self)\nwhen String then @@\#{sym}\nelse nil\nend\nend\n"
  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 "if ! defined? @@\#{sym.id2name}\[email protected]@\#{sym.id2name} = nil\nend\n\ndef self.\#{sym.id2name}=(obj)\[email protected]@\#{sym.id2name} = obj\nend\n\ndef self.set_\#{sym.id2name}(obj)\[email protected]@\#{sym.id2name} = obj\nend\n\ndef \#{sym.id2name}=(obj)\[email protected]@\#{sym} = obj\nend\n"
  end
end