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}")