7.1 update: strange serialize behavior #2410
Description
Currently, I try to update my app from rails 7.0 to 7.1.
One thing that I recognized it the behavior of searching for DB entries where serialize is used for a column to store a Hash
Let's say, I have the model:
class SomeModel < ApplicationRecord
serialize :something, type: Hash, coder: YAML
endI would like to get all entries where something is empty/nil/null/...
Using Rails 7.0:
SomeModel.where('something is NULL').count
# --> "SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE (something is NULL)"
# result is 100SomeModel.where(something: nil).count
# --> "SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE \"SOME_MODELS\".\"SOMETHING\" IS NULL"
# result is 100SomeModel.where(something: {}).count
# --> "SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE \"SOME_MODELS\".\"SOMETHING\" IS NULL"
# result is 100I always get the same result.
When I do the same with Rails 7.1
SomeModel.where('something is NULL').count
# --> "SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE (something is NULL)"
# result is 100SomeModel.where(something: nil).count
# -->"SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE DBMS_LOB.COMPARE(\"SOME_MODELS\".\"SOMETHING\", NULL) = 0"
# result is 0SomeModel.where(something: {}).count
# -->"SELECT \"SOME_MODELS\".* FROM \"SOME_MODELS\" WHERE DBMS_LOB.COMPARE(\"SOME_MODELS\".\"SOMETHING\", NULL) = 0"
# result is 0I only get the correct result for SomeModel.where('something is NULL').count. The other queries do not work.
Is this a new Rails 7.1 behavior, or is this related to the Oracle adapter? I would not be a fan of switching from something: nil to 'something is NULL' because I would need an additional where if I would further filter the entries, and rubocop would complain anyway (Use where(something: nil) instead of manually constructing SQL. (convention:Rails/WhereEquals)).
System configuration
Rails version: 7.1.4
Oracle enhanced adapter version: 7.1.0
Ruby version: 3.3.4
Oracle Database version: 19.22 (19c)