params[...] comparison raises "undefined method `>' for nil:NilClass" error in ruby on rails

Question

I want to check below:

if params[:hidval] > "0"
OR
if !params[:hidval] < "1"

But it gave me error below:

undefined method `>' for nil:NilClass

How do I check above conditions in ruby on rails?

Answer 1

The error message says it all. Make sure, the param actually exists. You try to compare nothing (NilClass) with a number. (which is actually a string, that will be your next problem)

Probably correct would be:

if params[:hidval].present? && params[:hidval] > 0
 # Do something ...
end