无法删除主题 - 错误 500，rake 中止！

[fzngagan (Faizaan Gagan)]

看看这个。您是否正尝试处理一个未附加任何组的受限类别？

MessageBus::InvalidMessageTarget (MessageBus::InvalidMessageTarget)

When trying to create a new topic in a specific category, I get a 500 error. It seems to be specific to this category, since I can create a topic without problems in other categories. Investigating lead me to MessageBus::InvalidMessageTarget (MessageBus::InvalidMessageTarget) I tracked it down to lib/models/user_action.rb (line 293). On line 265 of the same file is a todo: TODO there are conditions when this is called and user_id was already rolled back and is invalid. I think this is wha…