Question

在这里在模型中

has_attached_file :image, styles: { medium: "250" }, default_url: "/images/:style/missing.png"
validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/

_comment.html.erb

中的

  <% if !comment.image.url(:medium)  == '/images/medium/missing.png' %>
<img src="<%= comment.image.url(:medium) %>">
  <% end %>

像我说的那样，只有当我包含图像时它才会返回错误 PS。我确实迁移并重新启动了服务器有什么想法吗？谢谢！

ERROR

ActionController::UnknownFormat

并突出显示对评论控制器

中的创建操作中的格式作出响应

  def create

if params[:comment][:parent_id].present?
  @comment = Comment.find(params[:comment][:parent_id]).replies.build(comment_params)
  #@comment = @post.comments.create(comment_params)
  @comment.user = current_user
  @comment_parent = Comment.find(params[:comment][:parent_id]).user
  @post = Post.find_by_id(params[:comment][:post_id])
  puts 'ffffffffffffffffffffffffffffff'
  puts @post
  puts 'ffffffffffffffffffffffffffffffddddd'
elsif params[:comment][:parent_id].blank?
@post = Post.find(params[:post_id])
  @comment = @post.comments.create(comment_params)
  @comment.user = current_user # I ADDED THE @POST
  @comment.create_activity :create, owner: current_user, key: 'commenting', recipient: @comment.post.user
end


    @comment.save
    @comment.body.scan(/@(\w+)/).flatten.to_a.each do|username|
    @mentioned = User.find_by_username(username)
    if !@mentioned.blank?
      @comment.body = username
      @comment.save
      @comment_body = @comment.body
      @comment2 = @comment
      @comment2.create_activity :create, recipient: @mentioned, key: 'mentioning'
      puts @comment_body
      mentioned_id = @mentioned.id
      mentioned_username = @mentioned.username
      @comment.body.gsub!(username, '<a class="mentioned" href="/user/' + mentioned_username.to_s + '">@' + mentioned_username.to_s + '</a>')
      @comment.save
      puts @comment_body
    end  
  end
  if @comment.save
  respond_to do |format|
     #format.html
     format.js
end

end

端

添加简单回形针字段后，为什么rails返回错误

0 个答案: