Fix for nested_attributes with has_many association fails when a single record is being updated.

[#5705 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb
index 7372ab3278..bdd940f3ee 100644
--- a/activerecord/lib/active_record/nested_attributes.rb
+++ b/activerecord/lib/active_record/nested_attributes.rb
@@ -377,7 +377,12 @@ module ActiveRecord
       end
 
       if attributes_collection.is_a? Hash
-        attributes_collection = attributes_collection.sort_by { |index, _| index.to_i }.map { |_, attributes| attributes }
+        keys = attributes_collection.keys
+        attributes_collection = if keys.include?('id') || keys.include?(:id)
+          Array.wrap(attributes_collection)
+        else
+          attributes_collection.sort_by { |i, _| i.to_i }.map { |_, attributes| attributes }
+        end
       end
 
       association = send(association_name)