Malformed params in rails controllers -

i writing action receive params hash this:

user = {:name=>"adam", :age=>15, :nickname=>"mynickname"}

should care if params correct hash? want know if need check if user hash , not string, integer or else.

i wrote nickname value

def nickname     if params[:user].present?         params[:user][:nickname].presence     end end 

but fails if params[:user] string , not hash. should write validations that? if so, best practices writing them?

you following :

nickname = params[:user][:nickname] rescue nil 

nickname nil if error occurs while browsing hash.

be careful rescue can hide errors, in case, it's pretty harmless since doing fetching values hash.