Ruby printed this

NoMethodError: undefined method `name' for nil:NilClass

What it meansYou called the name method on a value that is nil, so the object you expected, often the result of a record lookup, does not exist.

The first thing to checkCheck the line where the receiver came from, often a find_by or hash lookup that returned nil; guard with &.name or handle the missing case.

The walrus saysRuby calls nil a NilClass and means it.