<% # if entry.editable_by?(User.current) -%>
<%= link_to image_tag('edit.png'), {:controller => controller.controller_name, :action => 'edit', :startday => entry.spent_on, :user_id => entry.user_id, :project_Id => @project_id, :tab => controller.controller_name},
:title => l(:button_edit) %>
<%= link_to image_tag('delete.png'), {:controller => controller.controller_name, :action => 'destroy', :startday => entry.spent_on, :user_id => entry.user_id, :project_id => @project_id, :tab => controller.controller_name},
:confirm => l(:text_are_you_sure),
:method => :delete,
:title => l(:button_delete) %>
<% # end -%>
这段 view 页面上连接地址所带参数的传递中:controller => controller.controller_name
这个参数是从哪里获取的?