Question

I’m pretty new to ruby an I try to develop something currently.

But I got an small error when it comes to routing.

my routes.rb

resources :games do
resources :matches
end

game.rb

has_many :matches

match.rb

belongs_to :game

rake routes

new_game_match GET    /games/:game_id/matches/new(.:format)      matches#new

where error occurs:

<%= link_to 'Add Match', new_game_match_path %>

what error tells:

No route matches [GET] "/games/matches/new"

now i have no idea why he doesn’t route the game_id with it an why it raises this error..

anyone can help me plz?

if it helps, both models and controller were scaffolded but matches controller was edited to fit relations.

Answer 1

The new_game_match_path helper expects a game argument from which to pull the game_id parameter.

Given a game with id 123, stored in a variable called @game, you would invoke it like this:

new_game_match_path(@game)

Which would return a path like this:

/games/123/matches/new

When you nest routes this way, you’re making a new match for a specific game, and without including the @game parameter there is no way to build the URL.

You could also use the array syntax. The following is equivalent to new_game_match_path(@game):

<%= link_to 'Add Match', [:new, @game, :match] %>