在activeadmin中自定义csv格式禁用csv下载链接

Question

我有一个轻度定制的ActiveAdmin表注册用户的Rails应用程序。 app/admin/users.rb看起来像这样：

ActiveAdmin.register User do 
    actions :index, :show 

    preserve_default_filters! 
    filter :referrer, collection: User.all.map{ |user| [user.email, user.id] } 
    filter :referrals, collection: User.all.map{ |user| [user.email, user.id] } 

    index do 
    column :id 
    column("Name")    { |user| user.first_name + " " + user.last_name } 
    column :email 
    column("Referrer", :referrer, :sortable => :referrer_id) 
    column :referral_code 
    column("Created at", :created_at, :sortable => :created_at) 
    column("Referral count") { |user| user.referrals.count } 
    actions 
    end 
end 

这个按预期工作。但我也想自定义csv文件下载的布局。因此，我在最后一个末尾添加此块：

csv do 
    column :id 
    column("Name")  { |user| user.first_name + " " + user.last_name } 
    column :email 
    column("Referrer", :referrer) 
    column :referral_code 
    column("Created at", :created_at) 
    column("Referral count") { |user| user.referrals.count } 
    end 

添加后，单击CSV链接在浏览器中不执行任何操作。我跟工头本地运行的应用程序后，我点击它显示了以下错误：

08:58:12 web.1 | E, [2014-09-10T08:58:12.818820 #4610] ERROR -- : app error: no implicit conversion of Symbol into Hash (TypeError) 
08:58:12 web.1 | E, [2014-09-10T08:58:12.818937 #4610] ERROR -- : /Users/maxnorton/.bundler/ruby/2.0.0/active_admin-bf9dabe6a568/lib/active_admin/csv_builder.rb:41:in `merge' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.818999 #4610] ERROR -- : /Users/maxnorton/.bundler/ruby/2.0.0/active_admin-bf9dabe6a568/lib/active_admin/csv_builder.rb:41:in `column' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819059 #4610] ERROR -- : /Users/maxnorton/Documents/dev/prelaunchr/app/admin/users.rb:23:in `block (2 levels) in <top (required)>' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819116 #4610] ERROR -- : /Users/maxnorton/.bundler/ruby/2.0.0/active_admin-bf9dabe6a568/lib/active_admin/csv_builder.rb:59:in `instance_exec' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819176 #4610] ERROR -- : /Users/maxnorton/.bundler/ruby/2.0.0/active_admin-bf9dabe6a568/lib/active_admin/csv_builder.rb:59:in `exec_columns' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819233 #4610] ERROR -- : /Users/maxnorton/.bundler/ruby/2.0.0/active_admin-bf9dabe6a568/lib/active_admin/csv_builder.rb:46:in `build' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819289 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/actionpack-4.1.4/lib/action_dispatch/http/response.rb:95:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819363 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/actionpack-4.1.4/lib/action_dispatch/http/response.rb:95:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819421 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/actionpack-4.1.4/lib/action_dispatch/http/response.rb:95:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819477 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/actionpack-4.1.4/lib/action_dispatch/http/response.rb:50:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819534 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819591 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819654 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819712 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819767 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819822 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819876 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819931 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/lint.rb:647:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.819987 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/body_proxy.rb:31:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820042 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/chunked.rb:23:in `each' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820100 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_response.rb:60:in `http_response_write' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820193 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:586:in `process_client' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820252 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:670:in `worker_loop' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820307 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:525:in `spawn_missing_workers' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820362 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:140:in `start' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820417 #4610] ERROR -- : /Library/Ruby/Gems/2.0.0/gems/unicorn-4.8.3/bin/unicorn:126:in `<top (required)>' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820471 #4610] ERROR -- : /usr/bin/unicorn:23:in `load' 
08:58:12 web.1 | E, [2014-09-10T08:58:12.820525 #4610] ERROR -- : /usr/bin/unicorn:23:in `<main>' 

好像是第一个错误行可能是关键的，但我不知道它是指哪个符号至。我究竟做错了什么？

Answer 1

试试这个：

... 
column("Referrer") { |user| user.referrer } 
column :referral_code 
column("Created at") { |user| user.created_at } 
...