zoukankan      html  css  js  c++  java
  • 通过rails console执行sql语句

    $ RAILS_ENV=production bundle exec rails c
    irb(main):008:0> r = ActiveRecord::Base.connection.execute 'show create database ott_remote_cms_production'
    => #<Mysql2::Result:0x002b338fe61d68 @query_options={:as=>:array, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:utc, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>214125, :cast=>true, :default_file=>nil, :default_group=>nil, :adapter=>"mysql2", :encoding=>"utf8", :pool=>5, :username=>"", :password=>"", :host=>"", :port=>3306, :database=>"cms_production", :flags=>2}>
    irb(main):009:0> r.each {|row| puts row }
    ott_remote_cms_production
    CREATE DATABASE `cms_production` /*!40100 DEFAULT CHARACTER SET utf8 */
    => [["cms_production", "CREATE DATABASE `ott_remote_cms_production` /*!40100 DEFAULT CHARACTER SET utf8 */"]]
    > r = ActiveRecord::Base.connection.execute 'show tables'
    => #<Mysql2::Result:0x002b338fe01aa8 @query_options={:as=>:array, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:utc, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>214125, :cast=>true, :default_file=>nil, :default_group=>nil, :adapter=>"mysql2", :encoding=>"utf8", :pool=>5, :username=>"", :password=>"", :host=>"", :port=>3306, :database=>"cms_production", :flags=>2}>
    irb(main):016:0> r.each {|row| puts row }
    => []
    irb(main):017:0> r = ActiveRecord::Base.connection.execute 'show variables like "%char%"';
    irb(main):018:0* r.each {|row| puts row }
    character_set_client
    utf8
    character_set_connection
    utf8
    character_set_database
    utf8
    character_set_filesystem
    binary
    character_set_results
    utf8
    character_set_server
    utf8
    character_set_system
    utf8
    character_sets_dir
    /usr/share/mysql/charsets/
    => [["character_set_client", "utf8"], ["character_set_connection", "utf8"], ["character_set_database", "utf8"], ["character_set_filesystem", "binary"], ["character_set_results", "utf8"], ["character_set_server", "utf8"], ["character_set_system", "utf8"], ["character_sets_dir", "/usr/share/mysql/charsets/"]]
  • 相关阅读:
    ssh反向代理+正向代理
    用 Java 撸了一款 SSH 客户端,真香啊!
    python清洗字符串
    欢迎来到 ZooKeeper 动物世界
    开篇:免费开源的趣讲 ZooKeeper 教程(连载)
    记忆中的像素块褪色了吗?用开源的体素编辑器重新做个 3D 的吧!
    不用再等后端的接口啦!这个开源项目花 2 分钟就能模拟出后端接口
    区块链技术在国外基础教育中的应用
    区块链在教育中的应用
    《敏捷开发培训考试》考试题目及答案
  • 原文地址:https://www.cnblogs.com/iwangzheng/p/5336584.html
Copyright © 2011-2022 走看看