Question

用户已获得授权，并且想要创建评论。创建新帖子时，表单中包含一个字段：post。另一个字段是隐藏的（它在模型Comment.rb中）。如何在以下def中分配用户的id，以便保存注释文本和user_id？

评论/视图

<%= simple_form_for(@comment) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.input :user_id %> (this line should hide and id should assign itself)
    <%= f.input :text %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

会话。控制器

 def create
      user = User.find_by_name(params[:name])
      if user and user.authenticate(params[:password])
        session[:user_id] = user.id
        redirect_to admin_url
      else
        redirect_to login_url, alert: "Неправильный логин или пароль!"
    end

  end

Comments_controller

def create
    @user = User.all
    @comment = Comment.all
    @comment = Comment.new(comment_params)
    respond_to do |format|
      if @comment.save
        format.html { redirect_to @comment, notice: 'Comment was successfully created.' }
        format.json { render action: 'show', status: :created, location: @comment }
      else
        format.html { render action: 'new' }
        format.json { render json: @comment.errors, status: :unprocessable_entity }
      end
    end
  end

Answer 1

将user_id退出表单。相反，在控制器中，写：

 def create
   @user = User.find(session[:user_id]) #whoever the logged in user is
   @comment = @user.comments.build(comment_params)
   respond_to do |format|
     if @comment.save
       format.html { redirect_to @comment, notice: 'Comment was successfully created.' }
       format.json { render action: 'show', status: :created, location: @comment }
     else
       format.html { render action: 'new' }
       format.json { render json: @comment.errors, status: :unprocessable_entity }
     end
  end
 end

另外，请确保您的用户对has_many评论进行了建模。

Answer 2

您只需执行此操作即可隐藏字段

<%=f.hidden_field :user_id, :value => "its_value" %>

所以它会像

 <%= simple_form_for(@comment) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.hidden_field :user_id , :value => @user.id %>      
 <%= f.input :text %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

如何隐藏id字段并自行分配？

2 个答案: