Cascading Ruby Logic? -


is possible following signed out user without triggering .consumer being called on nil error?

if signed_in? && current_user.consumer   puts "hello world" end

for of site have had nest these types of conditionals like:

if signed_in?   if current_user.consumer   end end

...which doesn't bad, when have lots of other code on page, can hassle..

i want statement signed_in? evaluated , if true second conditional evaluated... in single line. possible?

yes! ruby supports short-circuiting logic, first code block want: if signed_in? evaluates false, ruby interpreter lazy , not bother evaluating rest of condition.

similarly, if user not signed in, !signed_in? || current_user.banned? short-circuit when realizes !signed_in? true , not bother evaluate current_user.banned?.


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