Carrierwave mongoid minimagick

Question

我知道有人问了很多问题，但找不到答案以及如何解决我的问题。我想在第一次上传时调整图像大小，但它不起作用。我可以在不调整大小的情况下正确加载图像。 问题是当我添加进程时：resize_to_fit => [300, -1]

我有一个带有 gem 的 rails 4 应用程序

gem 'carrierwave'
gem 'carrierwave-mongoid', :require => 'carrierwave/mongoid'
gem 'fog'
gem 'mini_magick'
gem 'mongoid', '~> 4.0.0.beta1'

image_uploader.rb

class ImageUploader < CarrierWave::Uploader::Base

  include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  storage :fog

  process :resize_to_fit => [300, -1]

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  def extension_white_list
    %w(jpg jpeg gif png)
  end

end

Answer 1

改变这一行

  process :resize_to_fit => [300, -1]

到

process :scale => [200, 300] #specify whatever width and height you want there and try

对不起，您需要在上传器中添加此方法

 def scale(width, height)
     # do something
   end