Support for Polymorphic Associations

I have the following schema:

model Post {
  id            String    @default(cuid()) @id
}

model Comment {
  id            String         @default(cuid()) @id
}

model Vote {
  id            String         @default(cuid()) @id
  item       Post | Comment
}

I’d like to associate the Vote model so that a vote an be created for a Post or a Comment.

As it stands now I have multiple models, PostVote and CommentVote which seems less than ideal.

[brielov]

Make sure all the things you mention have good features requests with good use case description and optimally potential APIs and designs - the better and easier it is to understand a feature, the easier time we have when we tackle these.

Here is a list of open issues I consider would make prisma a lot more appealing to companies with more complex needs. Most of them have suggestions and ideas on how to implement them.

• https://github.com/prisma/prisma/issues/2505 from 2020, 189 likes and several implementation proposal / suggestions.
• https://github.com/prisma/prisma/issues/2789 from 2020, 207 likes.
• https://github.com/prisma/prisma/issues/3725 from 2020, 46 likes.
• https://github.com/prisma/prisma/issues/6653 from 2021, 43 likes.
• https://github.com/prisma/prisma/issues/3398 from 2019, 42 likes.

Union Types: Every app comes to a point when some kind of feed or notification system is needed. So you have a model where the relation can be either A, B or C.

PostGIS: Any app working with some kind of geolocation.

Recursive Relations: Any app that has comments or product categories like an e-commerce.

Group by dates: Any app which wants to display a time based chart on the front-end, like a dashboard.

Soft deletes: Any app that don’t want to permanently delete records from the database or implement some kind of trash can.

These issues are old enough, useful enough and have enough likes to make it to the roadmap.

[lukehamilton]

It’s funny, I was googling to see if this was solved yet and found the issue I opened. I ran into another instance where I need polymorphic relations.