新手问题 Rails 4 Paperclip 3.0 对图片进行裁剪问题
rails4 paperclip3.0 对上传的图片进行裁剪，似乎裁剪的数据没有被重新处理，因为结果还是原来的整张图。
问题描述：
- 上传图片，进入图片编辑界面。正常
- 对图片进行裁剪，crop_X/crop_y,crop_h,crop_w 坐标变化，显示裁剪缩略图。正常
- 完成裁剪，提交。出错
提交之后显示界面，图片仍然为整张图，没有被裁剪。
更新方法
def update
@user = User.find(params[:id])
if @user.update_attributes(user_params)
if params[:user][:photo].blank?
redirect_to @user
else
render :action => 'crop'
end
else
render 'edit'
end
end
private
def user_params
params.require(:user).permit(:name, :email, :password, :phone,
:password_confirmation, :photo )
end
用户模型中：
has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" ,:large => "500x500>"},
:processors => [:cropper],
:url => "/assets/products/:id/:style/:basename.:extension",
:path => ":rails_root/public/assets/products/:id/:styl/:basename.:extension"
attr_accessor :crop_x, :crop_y, :crop_w, :crop_h
after_update :reprocess_photo, :if => :cropping?
我考虑到可能是因为我采用的是健壮参数的形式传递数据，难道这样 crop_x,crop_Y 等数据没有被传递过去？但是不确定。 这是处理裁剪动作
module Paperclip
class Cropper < Thumbnail
def transformation_command
if crop_command
crop_command + super.join(' ').sub(/ -crop \S+/, '').split(' ')
else
super
end
end
def crop_command
target = @attachment.instance
if target.cropping?
["-crop", "#{target.crop_w}x#{target.crop_h}+#{target.crop_x}+#{target.crop_y}"]
end
end
end
end
.permit(:name, :email, :password, :phone, :password_confirmation, :photo )
attr_accessor :crop_x, :crop_y, :crop_w, :crop_h
你的这四个值没传进去，cropping 方法可能就 false 了吧。试试下面： .permit(:name, :email, :password, :phone, :password_confirmation, :photo，:crop_x, :crop_y, :crop_w, :crop_h )
#6 楼 @lmorenbit 非常感谢，问题解决了部分！现在是裁剪实现了，但是服务器会崩溃.....如果还是将这四个参数传过去的话，重启之后还是崩！只有删掉，会正常。而且图片裁剪爱成功了！
#6 楼 @lmorenbit 服务器就不定的处理这个问题，重复的！
User Exists (0.4ms) SELECT 1 AS one FROM `users` WHERE (`users`.`email` = '[email protected]' AND `users`.`id` != 8) LIMIT 1
SQL (0.3ms) UPDATE `users` SET `photo_updated_at` = '2013-10-07 02:53:52', `updated_at` = '2013-10-07 02:53:52', `photo_file_name` = 'nightmash.jpg' WHERE `users`.`id` = 8
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: convert '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]' -crop 295x295+200+115 -auto-orient -resize "300x300>" '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-faee8k'
Command :: file -b --mime '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-faee8k'
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: convert '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]' -crop 295x295+200+115 -auto-orient -resize "100x100>" '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-td1rv4'
Command :: file -b --mime '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-td1rv4'
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: identify -format %m '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]'
Command :: convert '/tmp/nightmash20131007-11429-10t8ohw.jpg[0]' -crop 295x295+200+115 -auto-orient -resize "500x500>" '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-9vm6w8'
Command :: file -b --mime '/tmp/nightmash20131007-11429-10t8ohw20131007-11429-9vm6w8'
[paperclip] deleting /home/dreamcity/rails_project/flowerstore/public/assets/products/8/original/nightmash.jpg
[paperclip] deleting /home/dreamcity/rails_project/flowerstore/public/assets/products/8/medium/nightmash.jpg
[paperclip] deleting /home/dreamcity/rails_project/flowerstore/public/assets/products/8/thumb/nightmash.jpg
[paperclip] deleting /home/dreamcity/rails_project/flowerstore/public/assets/products/8/large/nightmash.jpg
User Exists (0.3ms) SELECT 1 AS one FROM `users` WHERE (`users`.`email` = '[email protected]' AND `users`.`id` != 8) LIMIT 1
SQL (0.3ms) UPDATE `users` SET `photo_updated_at` = '2013-10-07 02:53:53', `updated_at` = '2013-10-07 02:53:52', `photo_file_name` = 'nightmash.jpg' WHERE `users`.`id` = 8