如何从查询中获取值并在Rails上将值加1 [英] How do I get a value from query and add the value by 1 on Rails

问题描述

我非常感谢对这个简单问题的任何回复。

Hi, I really appreciate any respond for this simple question.

test = Model.find_by_sql("SELECT number FROM tbl_one LIMIT 1").each do |a|
    p = a('number')
    puts p
end

看，我的意思是，在将值存储到'p'之后，我如何将'p'值加1.

Look, I mean, after store a value to 'p', how do I add the 'p' value by 1.

puts p + 1

我试了但是不起作用。基于我所看到的，'p'并没有真正存储价值，但我不确定。无论如何，我是Ruby和Rails的新手



任何解决方案？

谢谢。

I tried it but doesn't work. Based on what I saw, the 'p' doesn't really store the value, but I don't really sure. Anyway, I'm new on Ruby and Rails

Any solution?
Thanks.

推荐答案

Ups！

抱歉，我的错误......我找到了它！

Ups!
Sorry, my mistake.. I found it!

p = a('number').to_i

然后我可以轻松地将值加1 ..

Then I can add the value by 1 easily..

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