问因此，我的db上有3种产品，但是在我的本地机器上，每次我创建产品时都会看到9...somehow在复制

EN

产品负载(4.8ms)从“=>”=> #http://www.heritagedaily.com/wp-content/uploads/20..."中选择"products“http://www.heritagedaily.com/wp-content/uploads/20..."，created_at："2017-03-07 19:17:57"，updated_at："2017-03-07 19:17:57"，颜色：”棕色“，价格：#>， “http://www.heritagedaily.com/wp-content/uploads/20.”，created_at："2017-03-07 19:17:57"，updated_at："2017-03-07 19:17:57"，颜色：“棕色”，价格：#>， “http://www.heritagedaily.com/wp-content/uploads/20.”，created_at："2017-03-07 19:17:57"，updated_at："2017-03-07 19:17:57"，颜色：“棕色”，价格：#>

这就是我在本地主机上看到的，当我进入产品页面=>时

ActiveRecord::SchemaMigration (0.2ms)从StaticPagesController#landing_page处理的"schema_migrations“中选择"schema_migrations".*作为HTML呈现静态_pages/ Load _page.html.erb在布局/应用程序降级警告中: uniq已被弃用，并将从Rails 5.1中删除(改为使用distinct )(调用从StaticPagesController#landing_page at /User/jovanka/Desktop/the_古董/app/view/view)静态_pages/ Load _page.html.erb:23)products (0.2ms)从"products“选择不同的"products".* 产品负载(0.8ms)从“产品”订单中选择“产品”.*。[“限制”，1]在布局/应用程序(20.5ms)中呈现静态_pages/landing_page.html.erb，完成了428 OK中的200 OK(查看: 404.1ms \html.erb: 1.6ms) 启动GET "/cable“for :1在2017-03-07 14:23:33 -0600 Started”/ WebSocket /“WebSocket :1 at 2017-03-07 14:23:33 -0600成功升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION: Upgrade，HTTP_UPGRADE: websocket)一次未经授权的连接尝试被拒绝升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION:升级，HTTP_UPGRADE: websocket)完成“/ WebSocket /”WebSocket :1 at 2017-03-07 14:23:33 -0600已完成“WebSocket /”WebSocket for :1 at 2017-03-07 14:23:33 -0600开始获取"/cable“：1 at 2017-03-07 14:23:42 -0600 Started /WebSocket for :1 at 2017-03-07 14:23:42-0600成功升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION: WebSocket)HTTP_UPGRADE: websocket)未经授权的连接尝试被拒绝，无法升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION:升级，HTTP_UPGRADE: websocket)完成“/ WebSocket /”WebSocket :1 at 2017-03-07 14:23:42 -0600 Finished“/WebSocket/”WebSocket for :1 at 2017-03-07 14:23:42 -0600开始获取"/products“for :1 at 2017-03-07 14:23:43 -0600由ProductsController#index处理，使产品/index.html.erb在布局/应用产品负载(0.2ms)中选择”产品“.*。“产品:古代珠宝 制品/_Product.html.erb (7.9ms)产品:古代珠宝制品:古代珠宝制品/_Product.html.erb (2.2ms)产品:古代珠宝制品:古代珠宝制品/_Product.html.erb (1.5ms)在布局/应用程序(20.9ms)内完成200 OK (视图: 142.1ms ActiveRecord: 1.1ms) 启动GET "/cable“for :1在2017-03-07 14:23:43 -0600 Started”/ WebSocket /“WebSocket :1在2017-03-07 14:23:43 -0600成功升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION: Upgrade，HTTP_UPGRADE: websocket)一次未经授权的连接尝试被拒绝升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION:升级，HTTP_UPGRADE: websocket)完成“/ WebSocket /”WebSocket :1 at 2017-03-07 14:23:43 -0600 WebSocket for :1 at 2017-03-07 14:23:43 -0600 Started "/cable“for :1 at 2017-03-07 14:23:53 -0600 ActiveRecord::SchemaMigration (0.6ms)从"schema_migrations”Started中选择"schema_migrations".*：在2017-03-07 14:23:53 -0600成功升级为WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION:升级，HTTP_UPGRADE: websocket)未经授权的连接尝试被拒绝升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION:升级，HTTP_UPGRADE: websocket)完成“/ WebSocket /”WebSocket :1 at 2017-03-07 14:23:53 -0600已完成“WebSocket /”WebSocket for :1 at 2017-03-07 14:23:53 -0600开始获取"/cable“：1 at 2017-03-07 14:24:05 -0600 Started”/WebSocket/“WebSocket:1 at 2017-03-07 14:24:05 -0600成功升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION: WebSocket)HTTP_UPGRADE: websocket)一次未经授权的连接尝试被拒绝升级到WebSocket (REQUEST_METHOD: GET，HTTP_CONNECTION: HTTP_UPGRADE: websocket)已完成“/ WebSocket /”WebSocket for :1 at 2017-03-07 14:24:05 -0600 WebSocket for :1 at 2017-03-07 14:24:05 -0600

产品/_Product.html.erb

<% @products.each do |product| %> 
  <div class="col-sm-2 col-md-4"> 
    <h3><%= link_to product.name, product %></h3> 
    <% if product.image_url.present? %> 
      <%= image_tag(product.image_url , class: "img-thumbnail") %> 
    <% end %>
    <br> <strong>Description<%= product.description %></strong> <br/>
    <strong>Colour:<%= product.colour %></strong> <br/> 
    <strong>Price: $ <%= product.price %></strong> <br/> 
    <%= link_to 'Show', product ,class:"btn btn-default"%> 
    <%= link_to 'Edit', edit_product_path(product), class:"btn btn-default" %> 
    <%= link_to 'Destroy', product, method: :delete, data: { confirm: 'Are you sure?' }, class:"btn btn-default"%> 
    <% logger.debug "Product: #{product.name}"%> <br> <br> 
  </div> <!-- /col --> 
<% end %>