Different timestamps behaviour with InsertAll about rails

[srozen]

Thanks for the explanation @justinko, makes sense indeed.

[Dmoment]

I am not sure, but I think this is somewhat related to this issue #44933

[justinko]

Well, you could do Post.upsert_all [{ id: 102, created_at: Time.current}].

For multiple reasons, it's so great that we have methods (e.g. upsert_all) that totally skip record instantiation and go straight to the DB and use native functions (NOW in this case).

If your logic depends on time, then I would use create (e.g. User.create([{ first_name: 'Jamie' }, { first_name: 'Jeremy' }])) instead of insert_all.