fengfans (fengfans)

使用 Kamal 部署 Rails7 项目，提示数据库域名无法解析

fengfans — Sun, 05 Nov 2023 13:21:49 +0800

本地 Macos 开发，本地 ubuntu22.04 部署，本地 docker 镜像封装成两个镜像，一个是 mysql 数据库，一个是 web 端，本地测试运行正常后，通过 Kamal 的 kamal setup 指令部署到 ubuntu，提示数据库域名无法解析，请问这样的运行环境，确保 docker 间正常通讯，网络配置有什么要求吗？

nginx，mina 与 puma 实现 rails 项目自动化部署，如何实现部署后 puma 自动启动。

fengfans — Sun, 29 Oct 2023 16:39:48 +0800

目前部署到 ubuntu 正常，本地开发主机 macos 执行 rails s 正常，但是部署到 ubuntu 后，puma 就不启动。即使在/var/www/html/current/目录下执行 bundle exec puma -C /var/www/html/current/config/puma.rb命令，通过访问rails项目也打不开默认页面，提示超时访问。

cat nginx.conf
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    types_hash_max_size 2048;
    # server_tokens off;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # SSL Settings
    ##

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
    upstream puma{
        server unix:/var/www/html/shared/tmp/sockets/puma.sock fail_timeout=0;
    }
    ##
    # Gzip Settings
    ##

    gzip on;

    # gzip_vary on;
    # gzip_proxied any;
    # gzip_comp_level 6;
    # gzip_buffers 16 8k;
    # gzip_http_version 1.1;
    # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    ##
    # Virtual Host Configs
    ##

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}


#mail {
#   # See sample authentication script at:
#   # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
#   # auth_http localhost/auth.php;
#   # pop3_capabilities "TOP" "USER";
#   # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
#   server {
#       listen     localhost:110;
#       protocol   pop3;
#       proxy      on;
#   }
#
#   server {
#       listen     localhost:143;
#       protocol   imap;
#       proxy      on;
#   }
#}

cat default
##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
    listen 80 default_server;
    listen [::]:80 default_server;

    # SSL configuration
    #
    # listen 443 ssl default_server;
    # listen [::]:443 ssl default_server;
    #
    # Note: You should disable gzip for SSL traffic.
    # See: https://bugs.debian.org/773332
    #
    # Read up on ssl_ciphers to ensure a secure configuration.
    # See: https://bugs.debian.org/765782
    #
    # Self signed certs generated by the ssl-cert package
    # Don't use them in a production server!
    #
    # include snippets/snakeoil.conf;

    root /var/www/html/current/public;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri $uri/ =404;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_redirect off;
            proxy_pass http://unix:/var/www/html/shared/tmp/sockets/puma.sock;

    }
    try_files $uri/index.html $uri @puma;

    # pass PHP scripts to FastCGI server
    #
    #location ~ \.php$ {
    #   include snippets/fastcgi-php.conf;
    #
    #   # With php-fpm (or other unix sockets):
    #   fastcgi_pass unix:/run/php/php7.4-fpm.sock;
    #   # With php-cgi (or other tcp sockets):
    #   fastcgi_pass 127.0.0.1:9000;
    #}

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #   deny all;
    #}
}

cat puma.rb
environment "production"

app_name = "cool"
application_path = "/var/www/html/"
directory "/var/www/html/current"

workers 2
threads 1,4



pidfile "/var/www/html/shared/tmp/pids/puma.pid"
state_path "/var/www/html/shared/tmp/sockets/puma.state"
stdout_redirect "/var/www/html/shared/log/puma.stdout.log", "/var/www/html/shared/log/puma.stderr.log"
bind "unix:/var/www/html/shared/tmp/sockets/puma.sock"
activate_control_app 'unix:/var/www/html/shared/tmp/sockets/pumactl.sock'


on_restart do
  puts 'On restart....'
end
preload_app!

mina 部署 rails 项目，求 secret_key_base 有关的配置流程，技术背景，求大神们指点迷津。

fengfans — Mon, 23 Oct 2023 22:13:01 +0800

开发主机，项目目录下，执行 mina deploy --trace，运行到 Migrating database rake aborted! 提示：ArgumentError: Missing secret_key_base for 'production' environment, set this string with bin/rails credentials:edit 使用 rails 6.1.7.6,ruby 3.0.0。

deploy.rb 配置文件如下

frozen_string_literal: true

require 'mina/rails' require 'mina/git' require 'mina/rbenv' require 'mina/bundler'

require 'mina/rbenv' # for rbenv support. (https://rbenv.org)

require 'mina/rvm' # for rvm support. (https://rvm.io)

Basic settings:

domain - The hostname to SSH to.

deploy_to - Path to deploy into.

repository - Git repo to clone from. (needed by mina/git)

branch - Branch name to deploy. (needed by mina/git)

set :application_name, 'cool' set :domain, '127.0.0.1'

set :deploy_to, '/var/www/html' set :repository, 'git@gitee.com:PP_heroGrow/cool.git' set :branch, 'main'

Optional settings:

set :user, 'f' # Username in the server to SSH to. set :port, '8022' # SSH port number. set :forward_agent, false # SSH forward_agent.

Shared dirs and files will be symlinked into the app-folder by the 'deploy:link_shared_paths' step.

Some plugins already add folders to shared_dirs like `mina/rails` add `public/assets`, `vendor/bundle` and many more

run `mina -d` to see all folders and files already included in `shared_dirs` and `shared_files`

set :shared_dirs, fetch(:shared_dirs, []).push('public/assets')

set :shared_files, fetch(:shared_files, []).push('config/database.yml', 'config/secrets.yml')

This task is the environment that is loaded for all remote run commands, such as

`mina deploy` or `mina rake`.

task :remote_environment do # If you're using rbenv, use this to load the rbenv environment. # Be sure to commit your .ruby-version or .rbenv-version to your repository. invoke :'rbenv:load'

# For those using RVM, use this to load an RVM version@gemset. # invoke :'rvm:use', 'ruby-2.5.3@default' end

Put any custom commands you need to run at setup

All paths in `shared_dirs` and `shared_paths` will be created on their own.

task :setup do # command %{rbenv install 2.5.3 --skip-existing} # command %{rvm install ruby-2.5.3} # command %{gem install bundler} end

desc 'Deploys the current version to the server.' task :deploy do # uncomment this line to make sure you pushed your local branch to the remote origin # invoke :'git:ensure_pushed' deploy do # Put things that will set up an empty directory into a fully set-up # instance of your project. invoke :'git:clone' invoke :'deploy:link_shared_paths' invoke :'bundle:install' invoke :'rails:db_migrate' invoke :'rails:assets_precompile' invoke :'deploy:cleanup'

on :launch do in_path(fetch(:current_path)) do command %(mkdir -p tmp/) command %(touch tmp/restart.txt) end end end

# you can use run :local to run tasks on local machine before or after the deploy scripts # run(:local){ say 'done' } end

For help in making your deploy script, see the Mina documentation:

- https://github.com/mina-deploy/mina/tree/master/docs

请问使用 mina 部署 rails 项目时，生产环境下的 secret_key_base 如何配置？基本流程是什么？求专家指点迷津。

现在大家都在用什么软件做 Ruby on Rails 的 IDE？

fengfans — Sun, 10 Apr 2022 18:50:39 +0800

textmate 还有人用吗？sublime text 还是 atom，还是其他的东东。

sublime text 的插件清单与配置指南，是否能共享一下？

科大毕业，在高校做 IT 技术工作，业余写网文，只为做一次思想实验

fengfans — Sun, 30 Jan 2022 22:58:21 +0800

如果人类个体是一台台计算机，那么我们执行的算法是什么呢？我在创作《皮皮英雄成长记》，为这个假设找到一个满意的答案……

http://mp.weixin.qq.com/mp/homepage?__biz=Mzg4MzExNDY3NQ==&hid=1&sn=714280668c17a5cd5f2fa6bab2db55f8&scene=18#wechat_redirect

哪个基于 Rails 的开源博客系统比较开放、体验较好？

fengfans — Fri, 27 Aug 2021 07:20:38 +0800

急求一个，想快速搭建起来自用。后期慢慢扩展功能、自己维护。求推荐。

创作卡壳了，急等！

fengfans — Sat, 27 Mar 2021 20:30:12 +0800

如今，关于人工智能的故事（《皮皮英雄成长记》）创作已达 15 万字，第一部接近尾声。但是，遇到了一个科学领域知识的空白，现在急需大家的帮助。故事背景写到怪兽数量暴增，仍然不停围攻人类在 Z64 星的城市。人类在城市地下构建了深达 100 米的庞大地下通道，并用加厚的合金金属外壳，隔绝小型怪兽、巨齿虫的渗透。但是，怪兽背后的 T32 星人，非常需要进入其中一座城市——太莫城下的远古遗迹内，找到操纵怪兽的一种秘密方法，但由于合金金属外壳的存在，无法突破。初步构思，T32 星人驱使怪兽用化学方法或金属方法（类似镓）突破合金外壳，请懂得金属材料、化学腐蚀方面知识的朋友帮忙提供理论知识与技术实践方面的材料支撑，确认现在或未来 70 年内可以实现类似需求，最好提供基础原材料名称、获取途径、加工工艺等相关信息，如果可行我再行创作。

作者：想像力的桥

IT 人方可读得轻松的科幻神秘小说

fengfans — Sat, 20 Mar 2021 11:48:53 +0800

一部只有从事 it 工作与专业学习的你，才会轻松构建故事画面的科幻神秘小说，从业越久越容易！

阅读链接： https://book.qidian.com/info/1026709199

微信公众号：皮皮英雄成长记

2016 款的 MacBook Pro，键盘如何保护不影响手感？

fengfans — Thu, 23 Jan 2020 20:46:50 +0800

机器的键盘刚免费更换了，但客服特别提醒不要进灰、进水、进 anything.....求教各位大神，这款机器的键盘如何保护？是不是要用键盘套？用哪款不影响散热、手感。。。。求推荐。

大家在家搭建的开发测试环境，服务端用什么硬件？

fengfans — Sat, 18 Jan 2020 10:19:57 +0800

是在 mac 上安装虚拟机，还是另购台式机或服务器，还是租用云端的服务？近日想学习 redis，mac 的性能比较弱，请教大神们的解决方案。如果本地部署硬件，静音问题如何解决的？

wechat-rails 使用问题：http://myurl/wechat，APPID 参数错误

fengfans — Sun, 17 Nov 2019 20:49:54 +0800

<!DOCTYPE html>

抱歉，出错了

AppID 参数错误

以上是调试工具的源码信息。

下面的链接是我输入标题所示链接后，经由浏览器返回的完整链接，奇怪的是 appid 后面怎么没有我的真实 ID，另外 wechat/后面的callback是要自己代码实现的吗？有没有代码示例？ https://open.weixin.qq.com/connect/qrconnect?appid&redirect_uri=http%3A%2F%2Fweixin.fengfanskb.top%2Fwechat%2Fcallback&response_type=code&scope=snsapi_login&state=3e3cbcc65f7b927683c73a6cfd151de07d86805c5b1f7eda

由于是新手，RAILS 与微信公众号的开发一头雾水，求大神指教。

capistrano+nginx，部署成功后只显示 nginx 默认页面

fengfans — Thu, 10 Oct 2019 05:07:28 +0800

部署成功后，只显示 nginx 默认页面，不显示 rails 页面，之前服务器回滚了一下，可能 nginx 的配置变化了。现在查找问题可以借助什么工作，怎样的思路来进行，请坛中大神赐教。

rails g wechat:session,出现以下提示，何处出了问题？

fengfans — Sun, 01 Sep 2019 23:34:11 +0800

rails 5.0.7+ruby 2.3.1+devise+wechat+omniauth-wechat-oauth2


/Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/generators/migration.rb:41:in `set_migration_assigns!': private method `next_migration_number' called for Wechat::Generators::SessionGenerator:Class (NoMethodError)
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/generators/migration.rb:57:in `migration_template'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/wechat-0.11.5/lib/generators/wechat/session_generator.rb:14:in `copy_wechat_sessions_migration'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/invocation.rb:133:in `block in invoke_all'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/invocation.rb:133:in `each'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/invocation.rb:133:in `map'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/invocation.rb:133:in `invoke_all'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/group.rb:232:in `dispatch'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/thor-0.20.3/lib/thor/base.rb:466:in `start'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/generators.rb:180:in `invoke'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands/generate.rb:13:in `<top (required)>'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/activesupport-5.0.7.2/lib/active_support/dependencies.rb:293:in `require'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/activesupport-5.0.7.2/lib/active_support/dependencies.rb:293:in `block in require'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/activesupport-5.0.7.2/lib/active_support/dependencies.rb:259:in `load_dependency'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/activesupport-5.0.7.2/lib/active_support/dependencies.rb:293:in `require'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:138:in `require_command!'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:145:in `generate_or_destroy'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:60:in `generate'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    from /Users/f/.rvm/gems/ruby-2.3.1@rails5new/gems/railties-5.0.7.2/lib/rails/commands.rb:18:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

[已经解决] production 环境无法显示 bootstrap 中的 CSS 样式

fengfans — Tue, 20 Aug 2019 23:05:01 +0800

同一个模板，添加了 bootstrap 的样式，但是在开发模式正常显示，在开发模式就不显示，现在一点思路都没有，请各位大神指点。需要什么文件请给个提示。

系统环境： Capistrano+Nginx + Passenger + Rails

大家的个人博客是定制开发还是开源系统

fengfans — Sat, 29 Jun 2019 10:19:00 +0800

我想建立一个个人博客站点，向大家了解一下。

Ruby 开发的业务流程引擎有吗？

fengfans — Mon, 22 Apr 2019 06:09:10 +0800

要搭一个业务流程引擎 (bpm)，解决连接不同应用系统的业务流程，开发基于后端数据库的移动端应用，请求推荐。

根据 ID，查找后没有记录如何处理？

fengfans — Sun, 11 Feb 2018 16:33:42 +0800

异常及代码如下：

ActiveRecord::RecordNotFound in SportsController#show
Couldn't find Sport with 'id'=7

Extracted source (around line #23):
21
22
23
24
25
26

  def show

       @sport = Sport.find_by_id(params[:id])
       if @sport.blank?
        @a = Activity.find(params[:id])
        @sport = Sport.find(@a.sport_id)

我想实现这样的功能：如果查询的 ID 存在，即继续后面的查询。否则，执行以下代码

@a = Activity.find(params[:id])
        @sport = Sport.find(@a.sport_id)

再继续后面的查询。

请大家指教，用什么方法实现

关于一对多模型关联中，子模型记录的编辑功能的实现。

fengfans — Sun, 11 Feb 2018 10:39:58 +0800

需要建立两个模型，模型 1 为 sport，记录 30 天的体育活动完成情况

模型 2 为 activity，记录当天完成的活动有哪些？具体成绩如何。当前 view 对应的是 sport_controller 中的 show 这个 action。求教大家，如何在第二个图的界面中实现编辑当前体育活动功能？

模型关联定义如下 sport 模型中 has_many :activities

activity 模型中 belongs_to :sport

问题清单： sport_controller 中的 show 这个 action 的代码如下：

def show
    console
    @sport = Sport.find(params[:id])
    @activities = @sport.activities
  end

view 的代码如下：

<% @activities.each do |a| %>
   <tr>
     <td><%= a.acname  %></td>
     <td><%= a.actime.to_s %></td>
     <td><%= a.grading %></td>
     <td><%= a.unit %></td>
     <td>
       <%= link_to("编辑",edit_sport_activity_path(a)) %>
     </td>
   </tr>
   <% end %>

编辑链接中，使用 edit_sport_activity_path(a) 不好用。这块应该如何写，才参在 activity 控制器的 edit 模板中，实现某一活动记录的内容编辑。

最近在选型基础平台，求建议

fengfans — Fri, 21 Apr 2017 20:42:35 +0800

数字化校园，有必要用到 esb 吗？微服务架构中需要吗？

最新的 Macbook Pro，大家有关注吗？

fengfans — Sat, 05 Nov 2016 21:05:39 +0800

适合入手做开发吗？会不会有不适的问题。