我在我的 Rails 应用程序中使用 redactor gem,它是所见即所得的编辑器。它允许用户附加图像。
我在 uploaders 文件夹下有这个文件,它将图像附加到使用 redactor gem 制作的帖子。
redactor_rails_picture_uploader.rb
# encoding: utf-8
class RedactorRailsPictureUploader < CarrierWave::Uploader::Base
include RedactorRails::Backend::CarrierWave
# Include RMagick or ImageScience support:
# include CarrierWave::RMagick
include CarrierWave::MiniMagick
# include CarrierWave::ImageScience
# Choose what kind of storage to use for this uploader:
storage :fog
# Override the directory where uploaded files will be stored.
# This is a sensible default for uploaders that are meant to be mounted:
def store_dir
"system/redactor_assets/pictures/#{model.id}"
end
# Provide a default URL as a default if there hasn't been a file uploaded:
# def default_url
# "/images/fallback/" + [version_name, "default.png"].compact.join('_')
# end
# Process files as they are uploaded:
# process :scale => [200, 300]
#
# def scale(width, height)
# # do something
# end
process :read_dimensions
# Create different versions of your uploaded files:
# version :thumb do
# process :resize_to_fill => [118, 100]
# end
# version :content do
# process :resize_to_limit => [800, 800]
# end
# Add a white list of extensions which are allowed to be uploaded.
# For images you might use something like this:
def extension_white_list
RedactorRails.image_file_types
end
# Override the filename of the uploaded files:
# Avoid using model.id or version_name here, see uploader/store.rb for details.
# def filename
# "something.jpg" if original_filename
# end
end
我不想限制用户上传小于 10 或 8 MB 的图片。
我也不想裁剪图像。
我想在我的 Rails 应用程序中将图像压缩到小于 10 或 8 MB,并且不打扰用户裁剪或压缩图像。
我有像 carrierwave、mini_magick 这样的 gem,它们都能正常工作。 这是我的 gem 文件。
source 'https://rubygems.org'
ruby '2.1.4'
gem 'bootstrap-sass', '~> 3.3.1'
gem 'autoprefixer-rails'
gem 'rails', '4.2.0.beta2'
gem 'bcrypt', '3.1.7'
gem 'faker', '1.4.2'
gem 'carrierwave', '0.10.0'
gem 'mini_magick', '3.8.0'
gem 'paperclip'
gem 'aws-sdk'
gem 'fog', '1.23.0'
gem 'will_paginate', '3.0.7'
gem 'bootstrap-will_paginate', '0.0.10'
gem 'mailboxer'
gem 'rack-reverse-proxy', :require => 'rack/reverse_proxy'
gem 'chosen-rails'
gem 'jquery-turbolinks'
gem 'masonry-rails', '~> 0.2.4'
gem 'newrelic_rpm'
gem 'rocket_pants', '~> 1.10.0'
gem "recaptcha", :require => "recaptcha/rails"
gem 'metamagic'
gem 'redactor-rails'
gem 'fitvidsjs_rails'
gem 'pusher'
gem 'sass-rails', '~> 5.0.0.beta1'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails', '~> 4.0.0.beta2'
gem 'jbuilder', '~> 2.0'
gem 'sdoc', '~> 0.4.0', group: :doc
group :development, :test do
gem 'byebug'
gem 'web-console', '~> 2.0.0.beta4'
gem 'spring'
gem 'sqlite3'
end
group :production do
gem 'pg', '0.17.1'
gem 'rails_12factor', '0.0.2'
gem 'unicorn'
end
carrier_wave.rb
if Rails.env.production?
CarrierWave.configure do |config|
config.fog_credentials = {
# Configuration for Amazon S3
:provider => 'AWS',
:aws_access_key_id => ENV['S3_ACCESS_KEY'],
:aws_secret_access_key => ENV['S3_SECRET_KEY'],
:region => ENV['S3_REGION'],
:path_style => true
}
config.fog_directory = ENV['S3_BUCKET']
end
end
谁能分享一下如何做到这一点?
请帮忙。谢谢。
最佳答案
我相信这会回答您的问题:
How To Specify the Image Quality in carrierwave .
我不知道如何指定兆字节,但您可以即时计算文件的大小以及将质量
设置为什么。文件越大意味着质量越差。
希望这有帮助:)
从页面复制粘贴
如果要设置图像质量,请创建文件 config/initializers/carrierwave.rb,内容如下:
module CarrierWave
module RMagick
def quality(percentage)
manipulate! do |img|
img.write(current_path){ self.quality = percentage } unless img.quality == percentage
img = yield(img) if block_given?
img
end
end
end
end
现在您可以在 uploader 中使用流程:质量:
class AvatarUploader < CarrierWave::Uploader::Base
include CarrierWave::RMagick
version :thumb do
process :resize_to_fit => [100, 100]
process :quality => 100
end
end
使用 MiniMagick 改变质量
# put this in config/initializers/carrierwave.rb
module CarrierWave
module MiniMagick
def quality(percentage)
manipulate! do |img|
img.quality(percentage.to_s)
img = yield(img) if block_given?
img
end
end
end
end
在你的上传类中
class ImageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
process :quality => 85
version :medium do
process :quality => 85
end
end
关于ruby-on-rails - Rails4 - 如何在不裁剪的情况下压缩 Rails 应用程序中用户附加的图像?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30628216/