rails change value of parameter in controller

I have this controller

 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" i开发者_如何学编程nto "3", and let "callothermethodthatusetheparam" the new param (which is "3")

however, "callothermethodthatusetheparam" in the end still used the old value("2").

How I can change this value in the controller, and let "callothermethodthatusetheparam" to use the new param value?

Thank you!

You have to modify the value directly, the instance variable does not point to the param, it just clones its value

params[:valueoftheparam] = 3

If you do like this, I am sure you will get 3 printed (@params will be "3")

def my_method
  @param = (params[:valueoftheparam])
  @param = "3"
  other_method
end


def other_method
  puts @param
end