carrierwave_direct例外空文件

Question

我用carrierwave_direct上传文件，但是当上传的文件是空的我得到了这样的错误：

<Error><Code>EntityTooSmall</Code><Message>Your proposed upload is smaller than the minimum allowed size</Message><MinSizeAllowed>1</MinSizeAllowed><ProposedSize>0</ProposedSize><RequestId>FE2FE66371A06E29</RequestId><HostId>k3aJ8EtnmPvVxJszZukKYbtEO5Ddrjq/a+FdhqTyL1nZ7afy+msTAA1MiwX8lXvH</HostId></Error> 

如何捕获此异常？ 我的代码：

collection_action :new_import do 
    @uploader = @organization.import_file 
    @organization.save 
    @uploader.success_action_redirect = import_admin_organization_rooms_url(@organization) 
    end 

    collection_action :import do 
    RoomImportWorker.perform_async(params[:bucket],params[:key],@organization.id,current_user.id) 
    redirect_to admin_organization_rooms_path(@organization), :notice => "Your request has been accepted! We will inform you via email about the results!" 
    end 

Answer 1

此验证看起来不错，我猜：

https://github.com/jnicklas/carrierwave/wiki/How-to%3A-Validate-attachment-file-size