将模型加载到rails中的数组

Question

If I save an array using @levels.each(&:save) how do i load it back from the model Level? That is: what is the appropriate command to repopulate the array from the saved data

@levels = Level.find_all

Does not seem to exist, I am pretty new to this as you see, i want to store and load, levels!

Here's my GamesController:

def initialize
@levels = [] unless @levels
@levels = levels

end

def add_level
  levels << Level.new
  levels.each(&:save)
  redirect_to edit_game_path(params[:id])
end

and the model:

class Game < ActiveRecord::Base
  has_many :levels
end

Answer 1

@levels = Level.all

Should give you an array of level objects. Declaring this instance variable in your GamesController will make it accessible to your view.

Answer 2

If your association is :

Game has many levels and level belongs to a game.

Then, @game = Game.find_by_id(params[:id]) #whoesoever game page is it @levels = @game.present? ? @game.levels : []

I hope, i understood your problem