Module: ModuleExt::QualifiedConst

Defined in:
lib/active_support/refinements/core_ext/module/qualified_const.rb

Defined Under Namespace

Modules: QualifiedConstUtils

Instance Method Summary collapse

Instance Method Details

#Module ⇒ Object

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. ++



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# File 'lib/active_support/refinements/core_ext/module/qualified_const.rb', line 26

refine Module do
  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

  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