在 MySQL2 gem 中使用准备好的语句？

如何创建准备好的语句insert and selectMySQL 中的查询？我正在使用 MySQL2 gem，我的连接对象如下所示：

 con = Mysql2::Client.new(:host => "#{ENV['DB_HOST']}", :port => '3306', :username => "#{ENV['DB_UNAME']}", :password => "#{ENV['DB_PWD']}", :database => 'dbname')

不幸的是，mysql2 gem 还没有准备好的语句支持。贡献者计划在不久的将来添加这样的功能，正如我们在 Pull Request 讨论中看到的那样：

https://github.com/brianmario/mysql2/pull/289 https://github.com/brianmario/mysql2/pull/289

If you must如果您的应用程序中有准备好的语句，我建议您阅读 Sequel，它对准备好的语句和绑定变量有非常好的支持：

https://github.com/jeremyevans/sequel https://github.com/jeremyevans/sequel

http://sequel.jeremyevans.net/rdoc/files/doc/prepared_statements_rdoc.html http://sequel.jeremyevans.net/rdoc/files/doc/prepared_statements_rdoc.html

UPDATE

正如@lulalala 所提到的，从版本开始0.4.0 MySQL2 宝石 https://github.com/brianmario/mysql2支持准备好的语句：

statement = @client.prepare("SELECT * FROM users WHERE login_count = ?")
result1 = statement.execute(1) # Binds the value 1 to the placeholder 
result2 = statement.execute(2) # Binds the value 2 to the placeholder

statement = @client.prepare("SELECT * FROM users WHERE last_login >= ? AND location LIKE ?")
result = statement.execute(1, "CA") # Binds 1 and 'CA' to the placeholders, respectively

我希望这有帮助。