I wrote a gem to help test that unique indices match uniqueness validations in rails https://github.com/emma-borhanian/schema_expectations https://github.com/em

I wrote a gem to help test that unique indices match uniqueness validations in rails https://github.com/emma-borhanian/schema_expectations https://github.com/emma-borhanian/schema_expectations If you only do rails-side validation, you have an (exploitable) race condition.