How to call a method expressed as a string

Question

I have this code:

def show_block_path
  Rails.application.routes.url_helpers.gate_path(resource_id))
end

I'm trying have to refactor it:

def show_block_path
  Rails.application.routes.url_helpers."{resource_type.downcase}"_path(resource_id))
end

resource_type.downcase is "gate", but the method doesn't work. Why?

Answer 1

Use Object#public_send:

def show_block_path
  Rails.application.routes.url_helpers.public_send(
    "#{resource_type.downcase}_path", resource_id
  )
end