Change Sinatra views directory location - ruby

Question

I'd like to structure a Sinatra application more like a Rails application with the following structure:
.
├── app
│ ├── models
│ │ └── a_model.rb
│ └── views
│  └── a_view.erb
└── app.rb
According to the documentation, it can be done by overwriting the :views setting:
:views - view template directory
A string specifying the directory where view templates are located. By default, this is assumed to be a directory named “views” within the application’s root directory (see the :root setting). The best way to specify an alternative directory name within the root of the application is to use a deferred value that references the :root setting:
set :views, Proc.new { File.join(root, "templates") }
I've setup :root and :views:
set :root, File.dirname(__FILE__)
set :views, Proc.new { File.join(root, 'app', 'views') }
# Also tried some variations like:
# set :views, 'app/views/'
# set :views, Proc.new { File.join(setting.root, 'app', 'views' }
# set :public_folder, Proc.new { File.join(root, 'app', 'views' }
# ...
class MyApp < Sinatra::Base
get '/' do
erb :a_view
end
end
But I'm always facing the same error message:
No such file or directory # rb_sysopen - /path/to/my/app/views/a_view.erb
Indeed, settings.views is evaluated to /path/to/my/app/views (instead of /path/to/my/app/app/views)
It looks like I cannot control the value of the :views (settings.views) variable. I know I could simply move the views folder to the root location.
Can anyone explain why I'm not able to control theses settings ?

Answer 1

Move settings inside class definition has all the settings are inherited from inside Sinatra::Base
class MyApp < Sinatra::Base
set :root, File.dirname(__FILE__)
set :views, Proc.new { File.join(root, 'app', 'views') }
get '/' do
erb :a_view
end
end
Or
class MyApp < Sinatra::Base
configure do
set :root, File.dirname(__FILE__)
set :views, Proc.new { File.join(root, 'app', 'views') }
end
get '/' do
erb :a_view
end
end