//CRUD SPRING

//EDIT
@GetMapping("/edit/{id}")
    public ModelAndView edit(@PathVariable("id") Long id) {
        return add(service.findOne(id));

    }
//DELETE
@GetMapping("/delete/{id}")
    public ModelAndView delete(@PathVariable("id") Long id) {

        service.delete(id);

        return findAll();
    }
//SAVE
@PostMapping("/save")
    public ModelAndView save(@Valid Post post, BindingResult result) {

        if(result.hasErrors()) {
            return add(post);
        }

        service.save(post);

        return findAll();
    }