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-rw-r--r--activerecord/lib/active_record/aggregations.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb
index 1040e6e3bb..39077aea7e 100644
--- a/activerecord/lib/active_record/aggregations.rb
+++ b/activerecord/lib/active_record/aggregations.rb
@@ -245,7 +245,8 @@ module ActiveRecord
define_method("#{name}=") do |part|
klass = class_name.constantize
if part.is_a?(Hash)
- part = klass.new(*part.values)
+ raise ArgumentError unless part.size == part.keys.max
+ part = klass.new(*part.sort.map(&:last))
end
unless part.is_a?(klass) || converter.nil? || part.nil?