Question

I have a model named Engine, and I am able to use it in views and controllers without issues.
The problem occurs when I use it in a model (for example, in callbacks or even simple instance methods).

#inside the vehicle model
def add_engines
  Engine.all.each do |ngin|
  ...

end

I get the error: NoMethodError: undefined method 'all' for #<Some_mounted_engine_name:0x00000103b48828>

I search the web, but I do not see Engine as a reserved word. Note that we use mounted engines in our app.

Answer 1

I think you’re running into Ruby scoping issues. Try ::Engine instead of Engine – you’re probably implicitly referring to Rails::Engine