łączenie Ruby z MySQL bez szyn

Question

Jak mogę połączyć Ruby z MySQL bez szyn? Chcę użyć Ruby Standalone do napisania czystego kodu ruby ​​do aplikacji internetowej. bez abstrakcji

Answer 1

Spójrz

require "mysql" # if needed 

@db_host = "localhost" 
@db_user = "root" 
@db_pass = "root" 
@db_name = "your_db_name" 

client = Mysql::Client.new(:host => @db_host, :username => @db_user, :password => @db_pass, :database => @db_name) 
@cdr_result = client.query("SELECT * from your_db_table_name') 

Answer 2

zainstalować gem mysql (sprawdź, czy libmysqlclient-dev zainstalowany).

mysql = Mysql.new(host, user, password, database) 
mysql.query("SELECT ...") 
mysql.close 

See the documentation for more information

Answer 3

Co za pomocą ActiveRecord ORM?

require 'mysql2' 
require "active_record" 

ActiveRecord::Base.establish_connection(
    :adapter => 'mysql', 
    :database => 'database', 
    :username => 'user', 
    :password => 'password', 
    :host  => 'localhost') 


class User < ActiveRecord::Base 
end 

Answer 4

Dla mysql2:

1) yum install mysql-devel 
2) gem install mysql2 

połączyć:

#!/usr/bin/env ruby 
require "mysql2" 

connect = Mysql2::Client.new(:host => "hostname", :username => "username", :password => "password", :database => "name_db") 
result = connect.query("SELECT * FROM table_name") 
result.each { |x| puts x }