lib/mongoid/contextual/mongo.rb in mongoid-5.1.3 vs lib/mongoid/contextual/mongo.rb in mongoid-5.1.4

@@ -292,11 +292,10 @@
       # @return [ Array ] The result of mapping.
       def map(field = nil, &block)
         if block_given?
           super(&block)
         else
-          field = field.to_sym
-          criteria.only(field).map(&field.to_proc)
+          criteria.pluck(field)
         end
       end
 
       # Create the new Mongo context. This delegates operations to the
       # underlying driver.