@RequestMapping(value = "{id}/edit", method = RequestMethod.GET)
 public String edit(@PathVariable Long id, Model model) {
   Recipe recipe = recipeRepository.find(id);
   model.addAttribute("recipe", recipe);
   return "recipes/edit";
 }
 @RequestMapping(value = "{id}", method = RequestMethod.DELETE)
 public String destroy(@PathVariable Long id) {
   Recipe recipe = recipeRepository.find(id);
   recipeRepository.destroy(recipe);
   return "redirect:/recipes";
 }
 @RequestMapping(method = RequestMethod.GET)
 public String index(Model model) {
   model.addAttribute("recipes", recipeRepository.find());
   return "recipes/index";
 }