Rails Routing with Constraint Class not working like expected

Question

I have a more complex constraints for routing, why is this simple example not working:

class FooBar
  def self.matches?(request)
    true
  end
end

get ':foo', to: redirect('/bar'), constraints: FooBar.new

All I get is

Invalid constraint: #<FooBar:0x007f87f14dce40> must respond to :call or :matches?

Any ideas how to get it work? Thanks.

Answer 1

must respond to :call or :matches?

Whats mean the instance of the FooBar must have a method(not the class method like in your code) matches :

class FooBar
  def matches?(request)
    true
  end
end

Or responde to call , proc in my example:

FooBar = proc do |request|
   # here goes code
end

get ':foo', to: redirect('/bar'), constraints: FooBar