ruby-on-rails – Rails 4 Carrierwave Minimagick：使用MiniMagick无法操作,也许它不是图像？原始错误：`mogrify -crop

2019年7月20日 267次阅读

一直在研究,但没有找到问题：我正在使用JCrop,Carrierwave和Minimagick关注裁剪图像的Railscasts PRO#182.当我重新创建图像版本时,我被提示错误：

CarrierWave::ProcessingError (Failed to manipulate with MiniMagick, maybe it is not an image? Original Error: mogrify -crop! 250x250+531+32 /tmp/mini_magick20160108-6544-1ec50pf.png failed with error:
mogrify: unrecognized option -crop!' @ error/mogrify.c/MogrifyImageCommand/4197.
):
app/uploaders/image_uploader.rb:48:incrop’
app/models/course.rb:15:in crop_image'
app/controllers/courses_controller.rb:12:inupdate’

有人可以帮我理解这个错误是什么意思吗？

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

调节器

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

ImageUploader

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 原来选项-crop！命令mogrify中不存在.决议只是改变.crop！到.crop

即在ImageUploader中：

img.crop！(“#{w} x#{h}#{x}#{y}”) – > img.crop(“#{w} x#{h}#{x}#{y}”)

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