ruby-on-rails - Rails 4 错误:ActiveRecord::RecordNotFound/找不到 'id' =

Question

我对 Rails 和编写我的第一个应用程序还很陌生。只是不知道如何在我的 Controller 中定位以下内容。

Controller

def index
  @tool = Tool.find(params[:id])
  @favorites = current_user.favorites
  @tools = Tool.where(user_id: current_user).order("created_at DESC")
  @user = current_user
end

索引 View

%h2 My Favorite Tools
- @favorites.each do |tool|
    = image_tag tool.cover_filename.url
    %h2= link_to tool.title, tool
    %p= tool.subtitle
    %p= @tool.impressionist_count
    %p= link_to @tool.get_upvotes.size, like_tool_path(@tool), method: :get
    %p= link_to "Edit", edit_tool_path(tool)
    %p
        http://ocubit.com/tools/
        = @tool.id
    %p= time_ago_in_words(tool.created_at)

%h2 My Tools
- @tools.each do |tool|
    = image_tag tool.cover_filename.url
    %h2= link_to tool.title, tool
    %p= tool.subtitle
    %p= @tool.impressionist_count
    %p= link_to "Edit", edit_tool_path(tool)
    %p
        http://ocubit.com/tools/
        = @tool.id
    %p= time_ago_in_words(tool.created_at)


= link_to "View Your Profile", '/users/'+@user.id.to_s

-if @user.use_gravatar?
    = image_tag gravatar_for @user
- else
    = image_tag @user.avatar_filename.url

%h1= @user.username

= link_to "Edit", edit_user_registration_path

如果我在浏览器中运行它会出现以下错误:

ActiveRecord::RecordNotFound in ToolsController#index
Couldn't find Tool with 'id'=

我已经将我的 Controller 更改为(测试)

@tool = Tool.find(1)

这行得通，所以问题一定存在。我根本想不通。

预先感谢您的帮助!

Answer 1

你实际上不需要这一行:

@tool = Tool.find(参数[:id])

如果您在索引 View 中，您希望显示所有工具，而不仅仅是一个。这将用于 :show View 。您在索引 View 中没有 params[:id]，您没有在 url 中指定它。

所以:

def index
  @user = current_user
  @favorites = @user.favorites
  @tools = @user.tools.order("created_at DESC")
end



%h2 My Favorite Tools
- @favorites.each do |tool|
    = image_tag tool.cover_filename.url
    %h2= link_to tool.title, tool
    %p= tool.subtitle
    %p= tool.impressionist_count
    %p= link_to tool.get_upvotes.size, like_tool_path(tool), method: :get
    %p= link_to "Edit", edit_tool_path(tool)
    %p
        http://ocubit.com/tools/
        = tool.id
    %p= time_ago_in_words(tool.created_at)

%h2 My Tools
- @tools.each do |tool|
    = image_tag tool.cover_filename.url
    %h2= link_to tool.title, tool
    %p= tool.subtitle
    %p= tool.impressionist_count
    %p= link_to "Edit", edit_tool_path(tool)
    %p
        http://ocubit.com/tools/
        = tool.id
    %p= time_ago_in_words(tool.created_at)


= link_to "View Your Profile", '/users/'+@user.id.to_s

-if @user.use_gravatar?
    = image_tag gravatar_for @user
- else
    = image_tag @user.avatar_filename.url

%h1= @user.username

= link_to "Edit", edit_user_registration_path