<%= f.input :address_line1, label: "Country", collecti, Search any entry from Database using ajax Routes        get 'search' Controller        def search           @companies = Company.search(params[:search].split("=").last)           respond_to :js       end Model        def self.search(search)           if search                 Company.where("name LIKE '%#{search}%'")           else                 Company.all           end       end index.html.erb :-       <%= text_field_tag :search, "", class: "search_companies" %>                  <%= render 'index_content' %>             , Set up Ruby on Rails with Paperclip and S3 using AWS SDK Uploading Files to S3 in Ruby with Paperclip Paperclip requires the following gems added to your Gemfile. 代码实战学生管理系统的管理界面    详细讲解C语言基础语法和多种常用数据类型    结合例子手把手教你函数的定义、使用、递归等知识 Location: Pictland. Distribution: Linux Mint 20 … LQ Guru . Package openssh-server is not available but is referred to by another package. 前言 No candidate version found for metasploit-framework No packages will be installed, upgraded, or removed.    代码实战C语言三大控制流，顺序，选择，循环结构 E: package has no installation candidate Linux is no doubt a great operating system. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libmysqlclient-dev' has no installation candidate 06-05-2017, 03:51 AM #2: hydrurga. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'openssh-server' has no installation candidate パッケージをインストールしようとすると、同じエラーが表示され … Package synaptic is not available, but is referred to by another package.    深入浅出C语言编译预处理、理解宏、包含文件、条件编译等 代码实战学生管理系统显示学员信息 Then we need to find the passenger ruby path. # Package aptitude has no installation candidate I tried # apt-get udate, and then # apt-get upgrade and then #apt-get install aptitude, as suggested in another post, but this did not help. Then use following link :-  https://stackoverflow.com/questions/42653690/psql-could-not-connect-to-server-no-such-file-or-directory-5432-error sudo chmod 777 -R /var/run/postgresql/ Then restart the postgres:-  sudo service postgresql restart  or   sudo systemctl start postgresql@9.6-main, UPLOADING ANY MEDIA FILE WITH CARRIER-WAVE RAILS Multiple file uploads Add it to your Gemfile:       gem 'mime-types'       gem 'mini_magick'       gem 'rmagick'       gem 'carrierwave', '~> 1.0'       gem 'carrierwave-video'       gem 'carrierwave-video-thumbnailer'       gem 'carrierwave-ffmpeg' Run       bundle Start off by generating an uploader: app/uploaders/vimeo_uploader.rb       rails generate uploader Vimeo Check out this file for some hints on how you can customize your uploader. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libopts25' has no installation candidate … Need to get 0 B of archives. Package aptitude is not available, but is referred to by another package. 某个夜深人静的夜晚，夜微凉风微扬，月光照进我的书房~ CARRIERWAVE - UPLOAD ANY MEDIA (AUDIO , VIDEO AND IMAGE ) FILE IN RAILS, SELECT COUNTRY WITH STATE AND IT'S CITIES RAILS, RAILS: UPLOADING PHOTOS VIA AMAZON S3 AND PAPERCLIP (UPLOADING FILES TO S3 IN RUBY WITH PAPERCLIP). I copied /etc/apt/source.list from the laptop to the VPS, but still get the same error, no installation candidate for aptitude.       代码实战学生管理系统删除学员信息 Done Package msttcorefonts is not available, but is referred to by another package. I'm having a rather annoying problem with apt-get in Debian 6.0. For example, aptitude remove wesnoth+ will install wesnoth, not remove it. # Gemfile gem 'paperclip' gem 'aws-sdk', '~> 2.3' or our paperclip version is 4.1.0 then we need to use 'aws-sdk' version < 2 (note: add version less than 2.0 otherwise you will get paperclip error) gem 'paperclip' gem 'aws-sdk', '< 2.0' Run bundle install and … Not every package listed on the command line has to be installed; you can tell aptitude to do something different with a package by appending an “override specifier” to the name of the package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: python2-minimal:i386 python2:i386 python2-minimal python2 2to3 E: Package 'python' has no installation candidate always the message "no installation candidate". This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'software-center' has no installation candidate this is the first action I did when I installed.. By the way I filled the /etc/apt/source.list by what I find in Kali page then I used Done [COLOR="Red"][B]No candidate version found for ncftp No candidate version found for ncftp[/B][/COLOR] No packages will be installed, upgraded, or removed. E: Package 'libssl1.0.0' has no installation candidate However there's a candidate to install the libssl-dev package, but none for the libssl1.0.0 I'm new with docker; does the perl 5.22 base image already come with libssl1.0.0 already preinstalled in the image? 0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Done Package scons is not available, but is referred to by another package. It should look something like this: class VimeoUploader < CarrierWave::Uploader::Base       storage :file end If we want to upload video or image then we will have to use :- class VimeoUploader < CarrierWave::Uploader::Base       include CarrierWave::MiniMagick       include CarrierWave::Video       include CarrierWave::Video::Thumbnailer       include CarrierWave::FFmpeg       storage :file          de, Country State Select is a library that provides an easy API to generate Country , State / Province and City dropdowns for use in forms. parse ( "http://example.org" )   # Shortcut   #response = Net::HTTP.post_form(uri, {"user[name]" => "testusername", "user[email]" => "testemail@yahoo.com"})     # Full control   http = Net :: HTTP . If you get this error when trying to upload to S3, you need to assign this IAM User the “AmazonS3FullAccess” Policy. 不正经的kimol君: 妙&h, 大学生网页设计大作业-以下5个网页设计制作作品自己任选： 1.网页制作基础大二dw作业 2.w. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package has no installation candidate I've attempted to include more information than was in that question, including the results of every suggestion in … 方法2很好用，不知道为啥，方法1只有在设置了 `LC_ALL` 为 en_US.UTF-8 才有用, 不正经的kimol君: 在学会各中查询语句之后,会带你学习数据的完整性, 掌握如果正确的向数据库中添加数据       代码实战学生管理系统修改学员信息, 【kimol君的无聊小发明】—用python写图片格式批量处理工具前言一、思路分析二、调整尺寸三、调整大小四、整合代码写在最后 So the package name should fine. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package somePackage has no installation candidate Extremely annoying and useless error that doesn’t tell you much on how to fix it. Package aptitude is not available, but is referred to by another package. request_uri )   request . 这编码问题困扰了我一上午，终于解决了，谢谢！, hp2019112233: I haven't changed my sources list after installing, could something in the sources cause this? 在最美的年华，做最好的自己，加油！, FC10382: Then run the command :- rails generate paperclip user image Define the file attribute in the Model class User < ActiveRecord::Base     has_attached_file :image, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"       validates_attachment_content_type :image, cont. 大佬的文章让我受益匪浅，如痴如醉，以后的日子还希望能够得到大佬的谆谆指点！, 阿丘的博客:    讲解C语言的发展史和C语言的快速启蒙    深入解读字符串的长度、复制、链接、比较等方法    面试必备知识点指针的深入解读,从此面对指针不再陌生 Package somePackage is not available, but is referred to by another package. HOW TO USE CURL ON RUBY ON RAILS? 最后视图,存储过程,索引的学习,将会带你掌握更高级的数据库技术. 【中级知识点】 Same thing happend when running: aptitude install mongodb-10gen-unstable No candidate version found for mongodb-10gen-unstable No candidate version found for mongodb-10gen-unstable No packages will be installed, upgraded, or removed. So, we can easily find the ruby path using :- passenger - config -- ruby - command When we run then we will get like :-   Command: /home/rohit/.rvm/gems/ruby -2.1.10/wrappers/ruby   Version: ruby 2.1.10p492 (2016-04-01 revision 54464) [x86_64-linux]   To use in Apache : PassengerRuby /home/rohit/.rvm/gems/ruby -2.1.10/wrappers/ruby   To use in Nginx : passenger_ruby /home/rohit/.rvm/gems/ruby -2.1.10/wrappers/ruby   To use with Standalone: /home/rohit/.rvm/gems/ruby -2.1.10/wrappers/ruby /usr/bin/passenger start Add that line in passenger.conf file, WHEN WE ENTER , SHOW LINE NUMBER IN TEXT AREA HTML PAGE:- <%= text_area_tag :query_editor, '' :name => "query_editor", :class => "add_query_editor" %>