Avoid extra calls to to_s

With #31615 `type_for_attribute` accepts either
a symbol as well as a string. `has_attribute?` and `attribute_alias`
also accept either. Since these methods call `to_s` on the argument,
we no longer need to do that at the call site.

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index de8afc9ccb..443ccaaa72 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -53,7 +53,7 @@ module ActiveRecord
       # Implements the ids writer method, e.g. foo.item_ids= for Foo.has_many :items
       def ids_writer(ids)
         primary_key = reflection.association_primary_key
-        pk_type = klass.type_for_attribute(primary_key.to_s)
+        pk_type = klass.type_for_attribute(primary_key)
         ids = Array(ids).reject(&:blank?)
         ids.map! { |i| pk_type.cast(i) }