载波错误 [英] CarrierWave Error

问题描述

我收到一个看起来像这样的错误：

I get an error that looks like this:

   NoMethodError (undefined method `image_will_change!' for #<Bar:0x24ddda0>):
  app/controllers/bars_controller.rb:43:in `new'
  app/controllers/bars_controller.rb:43:in `create'

单击提交注册后。我正在使用Carrierwave，并遵循了使用它的步骤，但是仍然出现错误。

After I click submit for a registration. I am using Carrierwave and have followed the steps to using it, but still have an error.

推荐答案

CarrierWave不支持 attribute_will_change！调用，至少我几次遇到此错误。请遵循如何：在 CarrierWave的Wiki 中，在挂载的上传器中检测新文件类似的功能。

CarrierWave doesn't support the attribute_will_change! call, at least I ran into this error a few times. Follow the steps from How to: Detect a new file in a mounted uploader at CarrierWave's wiki which provide similar functionality.

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