我尝试在回形针上应用水印,它一直显示错误消息,无法更新/上传图像。它保持显示**
未初始化的常量Paperclip::Watermark::PaperclipCommandLineError
**
gem文件
宝石"回形针",'4.2'宝石"轨道",'4.2.6'宝石"回形针压缩"
纸夹处理器/水印.rb
module Paperclip
class Watermark < Thumbnail
def initialize(file, options = {}, attachment = nil)
super
@watermark_path = options[:watermark_path]
@position = options[:position].nil? ? "SouthEast" : options[:position]
end
def make
src = @file
dst = Tempfile.new([@basename].compact.join("."))
dst.binmode
return super unless @watermark_path
params = "-gravity #{@position} #{transformation_command.join(" ")} #{@watermark_path} :source :dest"
begin
success = Paperclip.run("composite", params, :source => "#{File.expand_path(src.path)}[0]", :dest => File.expand_path(dst.path))
rescue PaperclipCommandLineError
raise PaperclipError, "There was an error processing the watermark for #{@basename}" if @whiny
end
dst
end
end
end
lisitng.rb
class Listing < ActiveRecord::Base
require 'paperclip_processors/watermark'
has_attached_file :image,
:processors => [:watermark],
:styles => {
:medium => {
:geometry => "300x300>",
:watermark_path => "#{Rails.root}/public/images/watermark.png"
},
:thumb => "100x100>",
}
我认为您的子类化是错误的。不要将Thumbnail子类化,将Paperclip::Processor 子类化
module Paperclip
class Watermark < Processor
...
https://github.com/thoughtbot/paperclip/blob/master/lib/paperclip/processor.rb