The default location that the generator places the builder class of lib/ isn't loaded automatically by the application and needs to be manually included somewhere. There are are few options:
Update the documentation to specify that it needs to be included
Add an initializer to the generator that requires the builder
Change the generator to put the builder in the app/helpers folder instead
The default location that the generator places the builder class of
lib/
isn't loaded automatically by the application and needs to be manually included somewhere. There are are few options:app/helpers
folder instead