On Thursday, January 15, 2015 at 11:51:39 AM UTC, Andrey Nering wrote:
>
> I have a custom form builder for my application:
> I am requiring it in an initializer:
>
> require "#{Rails.root}/lib/ruby/app_form_builder.rb"
> ActionView::Base.default_form_builder = ActionView::Helpers::
> AppFormBuilder
>
>
> This works, but I have to restart the server on every change. I was
> reading the Constant Guide
> <http://edgeguides.rubyonrails.org/autoloading_and_reloading_constants.html>,
> but didn't find the right way to made this file to be automaticaly
> reloaded. I tried to put this in /app/helpers forlder and making it default
> in application.rb, but I got "unitialized constant" error.
>
>
require is never a good idea if you want something to be reloaded. You've
also got a clash between the class name and it's location on disk - having
the class just be AppFormBuilder in lib/app_form_builder.rb should work.
Lastly if you look into the bowels of action view, the default_form_builder
method looks like this
def default_form_builder
builder = ActionView::Base.default_form_builder
builder.respond_to?(:constantize) ? builder.constantize : builder
end
So if you set default_form_builder to be a "AppFormBuilder" then that
should allow it to be reloaded.
> Also, I would like to know if Rails can reload code that modify native
> Ruby classes:
>
> class String
> def do_something
> 'something'
> end
> end
>
>
>
This can't be done. code reloading is done by removing the class/module
(using remove_const) and then letting it be loaded again, which wouldn't
work for a class like String
Fred
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