tRPC•3y ago

How to organise output types?

I'm having a hard time trying to figure out what the best way to organise output types and I was wondering if you guys/gals have any tips.

Things I'm having a hard time with:

Some output objects that may be returned in multiple places (e.g.
```
users.get
```
users.get
```
users.get
```
users.get
,
```
users.getAll
```
users.getAll
```
users.getAll
```
users.getAll
,
```
posts.get
```
posts.get
```
posts.get
```
posts.get
(as
```
Post.author
```
Post.author
```
Post.author
```
Post.author
), etc.) all need the same extra fields that can't come directly from Prisma (e.g. "the last post from the user" or "whether one can delete this user"); what's the best way to extract and reuse the logic for these fields?
How to mask output types (e.g. make sure that I don't return
```
User.passwordHash
```
User.passwordHash
```
User.passwordHash
```
User.passwordHash
ever)
How to express calculated fields (e.g.
```
fullName
```
fullName
```
fullName
```
fullName
=
```
firstName
```
firstName
```
firstName
```
firstName
- ```
lastName
```
  lastName
```
lastName
```
  lastName
  )
How to reuse output types in nested components (e.g. components that don't directly
```
useQuery
```
```
useQuery
```
)

Thanks

Alex / KATT 🐱•2/6/23, 10:46 AM

You can also do a middleware for that second one to make sure the result never returns any blocklisted keys

Alex / KATT 🐱•2/6/23, 5:22 PM

also looks like your'e looking for prisma validators https://www.prisma.io/docs/concepts/components/prisma-client/advanced-type-safety/prisma-validator

Alex / KATT 🐱•2/6/23, 5:22 PM

here's how ot infer https://github.com/trpc/examples-next-prisma-starter/blob/fdb1167269d3ffc5f437663639ad587679590edb/src/pages/post/%5Bid%5D.tsx#L6

Alex / KATT 🐱•2/6/23, 5:23 PM

example of a prisma validator https://github.com/trpc/examples-next-prisma-starter/blob/fdb1167269d3ffc5f437663639ad587679590edb/src/server/routers/post.ts#L11-L22

Alex / KATT 🐱•2/6/23, 5:23 PM

calculated fields i usually do with some like reused mapToUser()mapToUser()-style pure functions

Alex / KATT 🐱•2/6/23, 5:24 PM

but prisma is soon releasing prisma client extensions to help with that

sh03OP•2/8/23, 9:07 PM

Gotcha thanks