enumerable_behavior.rb in hydra-validations-0.3.2

- old
+ new

@@ -5,23 +5,29 @@
     # adding validation for each member of an enumerable attribute value.
     #
     # Behavior includes 'fixing' each error message to include the specific value
     # which was invalid.
     #
+    # `allow_empty` option can be used instead of `allow_blank` for greater
+    # clarity and precision with enumerable values. If a validator includes
+    # this mixin, then an empty enumerable value will always be invalid if
+    # `allow_empty` is false or nil.
+    #
     module EnumerableBehavior
 
       def validate_each(record, attribute, value)
-        if value.respond_to?(:each)
+        return super unless value.respond_to?(:each)
+        if value.respond_to?(:empty?) && value.empty?
+          record.errors.add(attribute, "can't be empty") unless options[:allow_empty]
+        else
           value.each do |v| 
             prev = record.errors[attribute].size rescue 0
             super(record, attribute, v)
             messages = record.errors[attribute]
             if messages && messages.size > prev
               record.errors.add(attribute, fixed_message(v, messages.pop))
             end
           end
-        else
-          super
         end
       end
 
       protected
 