feat(server): Nullable asset dates

[etnoy]

Allow fileCreatedAt, fileModifiedAt, localDateTime to be null, making them placeholders before metadata extraction runs

No dtos have changed, so clients don't need to be updated

[alextran1502]

Hello, how has this PR been tested?

Is there a better way to always group those column is not null conditions to a helper method?

[mertalev]

Any query that does an inner join on the exif table can do without those filters. The ones that don't only really need to check one of those columns since they're all set at the same time anyway (i.e. they will all be null or all non-null).

[mertalev]

mapAsset being used in a context where this can happen is a bug. It's better to handle this with stricter typing in the input, both to catch issues before runtime and to avoid unnecessary runtime cost.

[etnoy]

I'll try to find a better solution for this, I agree it isn't very good.

[mertalev]

Why do we need this?

[etnoy]

This is for the searchAssetBuilder, see my code in asset.entity.ts. Maybe we need to find assets that have this as null in the future?

Otherwise, if you think it's better, I'll just add a non-null where parameter for each of the nullable dates that can't be turned off.

[mertalev]

We can go without this and always set the filter until there's a use-case for these toggles.

[etnoy]

Any query that does an inner join on the exif table can do without those filters. The ones that don't only really need to check one of those columns since they're all set at the same time anyway (i.e. they will all be null or all non-null).

Thanks, I'll modify the code accordingly

[etnoy]

Hello, how has this PR been tested?

Is there a better way to always group those column is not null conditions to a helper method?

Currently I've done some superficial manual tests. I wanted to get some feedback from the team before diving deeper.

In this PR, no asset will ever actually have a null date. All API endpoints require these dates to be set, it's only in the backend.

In my subsequent PR, #14456 , the changes done here are included. In that PR we actually have null dates since the library service sets crawled assets to have null dates as placeholders until metadata extraction runs. In that case I've done more testing, doing library imports, manual uploads and so on.