在Rails中访问任意动作

Question

I am somewhat confused as to how to properly access an action in a rails controller that is NOT associated with one particular model. The routing file, by default, seems to be routing the action name to "id". So if I type, say, /user/login, I end up with an error that says: "Couldn't find User with 'id'= login"

What is the proper way to access arbitrary action names in rails?

Answer 1

Make a route for it, obviously. The request goes this way:

• first it hits a route
• from there it hits a controllers' action
• [an action may invoke a model] (optional, but common)
• controller specified a view and fetches data to render
• view is sent back in response to a request

resource and resources might not be obvious about what they do. But in fact, they are shorthands to corresponding collections of routes used quite often, like this is what resources adds . And they're not monoliths, they can be customised to fit your needs. Providing options is just a start, you can provide a block to define your custom action routes for this resource like so:

resources :users do
  get :login
end

This will add a /users/login route that maps to UsersController#login , following Rails' conventions.

See this guide for more details and don't forget to run rake routes to see what you have at the moment.