为什么会出现路由错误？

Question

I am following a RoR tutorial and the routing file that was gererated in the tutorial is different to the one that was generated on my computer. The one on the tutorial was

Lecture::Application.routes.draw.do
  get 'say/hello'

my file gererated

Rails.application.routes.draw.do
  get 'say/hello'

Does this make a difference because I am getting a routing error:

Routing Error No route matches [GET] "/say/hello"

What is the reason for this?

Answer 1

You need to specify where the route leads. For example: ( Rails Routing from the Outside In )

get '/patients/:id', to: 'patients#show'

or in your case:

get 'say/hello', to: 'say#hello'

The to formatting is 'controller_name#controller_action'

To define an action use:

def hello
  #This is my hello action
end

Answer 2

If you have the say controller and hello method in that controller,

change,

get 'say/hello', to: 'say#hello'

to,

get '/say/hello', to: 'say#hello'

Observe, '/say/hello' .

If you dont have that controller,

type rake routes in rails console and update your question.

Answer 3

#config/routes.rb

get 'say/hello' => 'say#hello' #Here say is controller and hello is action

#controllers/say_controller.rb

class SayController < ApplicationController
  def hello
    ...
  end
end

Answer 4

your controller file should be:

say_controller.rb

Class SayController < ApplicationController
  def hello
   puts 'hello there'
  end
end

your routes.rb file should contain:

routes.rb

get '/anything/you_want/', to 'say#hello'

this should do the trick