一直在研究,但未能找出问题所在:我正在遵循Railscasts PRO#182,使用JCrop,Carrierwave和Minimagick进行图像裁剪。在我重新创建映像版本时,系统提示错误:


CarrierWave :: ProcessingError(无法使用MiniMagick进行操作,也许它不是图像?原始错误:mogrify -crop! 250x250+531+32 /tmp/mini_magick20160108-6544-1ec50pf.png失败,并显示错误:
迁移:无法识别的选项-crop!' @ error/mogrify.c/MogrifyImageCommand/4197. ): app/uploaders/image_uploader.rb:48:in crop'
app / models / course.rb:15:在crop_image' app/controllers/courses_controller.rb:12:in更新中


有人可以帮助我了解此错误表示什么吗?

模型

class Course < ActiveRecord::Base
  attr_accessor :crop_x, :crop_y, :crop_w, :crop_h
  after_update :crop_image

  mount_uploader :image, ImageUploader

  def crop_image
    image.recreate_versions! if crop_x.present?
  end
end


控制者

class CoursesController < ApplicationController

  def update
    @course = Course.find(params[:id])
    if @course.update_attributes(course_params)
      if course_params[:image].present?
        render :crop
      else
        redirect_to @course, notice: 'Successfully updated'
      end
    end
  end

  def course_params
    params.require(:course).permit(:title, :image, :crop_x, :crop_y, :crop_w, :crop_h)
  end
end


图像上传器

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::MiniMagick
  storage :file

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

  version :thumb do
    process :crop
    process :resize_to_fit => [250, 250]
  end

  def crop
    if model.crop_x.present?
      resize_to_fit(800, 350)
      manipulate! do |img|
        x = model.crop_x.to_i
        y = model.crop_y.to_i
        w = model.crop_w.to_i
        h = model.crop_h.to_i
        img.crop!("#{w}x#{h}+#{x}+#{y}")
      end
    end
  end
end

最佳答案

原来是选项-crop!在命令迁移中不存在。分辨率只是在更改.crop!到.crop

即在ImageUploader中:

img.crop!("#{w}x#{h}+#{x}+#{y}")-> img.crop("#{w}x#{h}+#{x}+#{y}")

09-25 18:46