Question

我想在书中添加评论（评论属于书），所以我添加了此表单以显示书页：

%h3 Add a comment:
= form_with(model: [ @book, @book.comments.build ], local: true) do |form|
  %p
    = form.text_area :content
  %p
    = form.submit "Add a comment"

它可以工作，但是我需要显示模型验证错误以获取空注释。我尝试过：

  - if  @book.errors.any?
    %h2
      = pluralize(@book.errors.count, "error")
      prohibited this article from being saved:
    %ul
      - @book.errors.full_messages.each do |msg|
        %li= msg

（在“ form_with”行之后），但没有任何反应。我认为@ book.errors是错误的，但是不知道如何替换它。

我的评论控制器的创建方法：

  def create
    @book = Book.find(params[:book_id])
    @comment = @book.comments.create(comment_params)
    @comment.user = current_user
    if @comment.save
    redirect_to book_path(@book)
   end
  end

Answer 1

1> comments_controller.rb

@GetMapping("/edit/{id}")
    public void edit(@PathVariable("id") int id, Principal principal) {

        User u = (User) userDetailsService.loadUserByUsername(principal.getName());

        if(u.getId() == id || u.getRoles().contains("ADMIN")) {
            //accept uer
        }



    }

2>将def create @book = Book.find(params[:book_id]) @comment = @book.comments.create(comment_params) @comment.user = current_user if @comment.save redirect_to book_path(@book) else redirect_back(fallback_location: book_path(@book)) end end替换为@book，因为@comment对象包含验证错误

@comment

在视图中显示验证错误

1 个答案: