thanks for response On Sep 6, 5:32 am, Frederick Cheung <[email protected]> wrote: > On Thursday, September 6, 2012 2:39:00 AM UTC+1, John Merlino wrote: > > > module ActionView > > module Helpers > > module FormHelper > > def form_for(foo, bar) > > instantiate_builder(foo, bar) > > end > > def instantiate_builder(foo,bar) > > self > > end > > end > > end > > end > > > "self" in instantiate_builder refers to > > ActionView::Helpers::FormHelper. self it will have access to methods > > in ActionView::Helpers (its parent module), correct? > > Not necessarily. > > if you do > class Foo > include ActionView::Helpers::FormHelper > end > > then > f = Foo.new > f.instantiate_builder > > then self in instantiate_builder is f. Whether or not other modules in > ActionView::Helpers have been included in Foo is not guaranteed (in the > particular case of view helpers in views then all the other submodules > of ActionView::Helpers would normally have been included) > > Fred
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