Ruby-on-rails rails 更改控制器中的参数值
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5014804/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
rails change value of parameter in controller
提问by rahardi
I have this controller
我有这个控制器
def mymethod
@theparam => (params[:valueoftheparam])
@theparam => "3"
callothermethodthatusetheparam
end
So basically, I have "valueoftheparam" which is "2".
I need to change the value of "2" into "3", and let "callothermethodthatusetheparam" the new param (which is "3")
however, "callothermethodthatusetheparam" in the end still used the old value("2").
所以基本上，我有“valueoftheparam”，即“2”。
我需要将“2”的值更改为“3”，并让“callothermethodthatusetheparam”使用新参数（即“3”），
但是，“callothermethodthatusetheparam”最终仍使用旧值（“2”）。
How I can change this value in the controller, and let "callothermethodthatusetheparam" to use the new param value?
如何在控制器中更改此值，并让“callothermethodthatusetheparam”使用新的参数值？
Thank you!
谢谢！
回答by Fernando Diaz Garrido
You have to modify the value directly, the instance variable does not point to the param, it just clones its value
你必须直接修改值，实例变量不指向参数，它只是克隆它的值
params[:valueoftheparam] = 3
回答by rubyprince
If you do like this, I am sure you will get 3 printed (@params will be "3")
如果你这样做，我相信你会得到 3 个打印（@params 将是“3”）
def my_method
@param = (params[:valueoftheparam])
@param = "3"
other_method
end
def other_method
puts @param
end
