我可以上传和附加图片并接受它但是现在我想替换/更新用户的化身。我以为我能跑再来一次。但这会引发一个错误:
ActiveRecord::RecordNotSaved: Failed to remove the existing associated avatar_attachment.这是什么意思?我如何改变一
我也不确定这个错误消息是什么意思"the operator *= is undefined for the argument type(s) PVector int“。PVector position, velocity, scaler, scaleSpeed, blurValue, blurSpeed;{size(600,600); position = new PV