Reusable Component to take router as props / dependency injection. How to type?

for example:

export const Content = async ({ api }) => {
  const items = await api.getAll.query({ watched: true })

  if (!items) {
    return <EmptyState />
  }

  return (
    <CardsContainer>
      {items.map((i) => {
        return <Card key={i.id} imgSrc={buildImgSrc(i.posterPath)} {...i} />
      })}
    </CardsContainer>
  )
}

export const Content = async ({ api }) => {
  const items = await api.getAll.query({ watched: true })

  if (!items) {
    return <EmptyState />
  }

  return (
    <CardsContainer>
      {items.map((i) => {
        return <Card key={i.id} imgSrc={buildImgSrc(i.posterPath)} {...i} />
      })}
    </CardsContainer>
  )
}

Content is either movies or series. I have movieRouter and seriesRouter with the same procedures. How can i type api ?

22 Replies

BillyBob•6mo ago

This leads me back to this. https://discord.com/channels/867764511159091230/867764511159091233/1204442193230831646

Nick•6mo ago

You linked to the blog post I wrote on this right? The answer is the second half to that If you have any more specific questions I can try to help but this is a broad one

BillyBob•6mo ago

BillyBob•6mo ago

This expression is not callable.
  Each member of the union type '(<T extends MovieFindManyArgs<DefaultArgs>>(args?: SelectSubset<T, MovieFindManyArgs<DefaultArgs>> | undefined) => PrismaPromise<...>) | (<T extends SerieFindManyArgs<...>>(args?: SelectSubset<...> | undefined) => PrismaPromise<...>)' has signatures, but none of those signatures are compatible with each other.

This expression is not callable.
  Each member of the union type '(<T extends MovieFindManyArgs<DefaultArgs>>(args?: SelectSubset<T, MovieFindManyArgs<DefaultArgs>> | undefined) => PrismaPromise<...>) | (<T extends SerieFindManyArgs<...>>(args?: SelectSubset<...> | undefined) => PrismaPromise<...>)' has signatures, but none of those signatures are compatible with each other.

Hi @Nick Lucas Thanks for responding. I am not sure how to solve this type issue.

Nick•6mo ago

If you can put together a stackblitz example then I could take a look. It’s typescript foo though so if you don’t understand the solution then you’re going to be in trouble down the line Should be possible anyway

BillyBob•6mo ago

hm, i use typescript and have for a couple of years, but if its messy for the sake of readability i might need another solution. I was trying to create a reuseable createService

import { type Prisma, PrismaClient } from '@prisma/client'

const prisma = new PrismaClient()

type CreateFunction<T> = (data: T) => Promise<T>
type GetAllFunction<T> = () => Promise<T[]>
type GetByIdFunction<T> = (id: number) => Promise<T | null>
type DeleteFunction<T> = (id: number) => Promise<T | null>
type UpdateFunction<T> = (id: number, data: T) => Promise<T | null>

interface EntityService<T> {
  create: CreateFunction<T>
  getAll: GetAllFunction<T>
  getById: GetByIdFunction<T>
  delete: DeleteFunction<T>
  update: UpdateFunction<T>
}

const createService = <T>( // This line?
  modelName: Uncapitalize<Prisma.ModelName>,
): EntityService<T> => {
  const prismaModel = prisma[modelName]

  return {
    create: (data) => prismaModel.create({ data }),
    getAll: () => prismaModel.findMany(),
    getById: (id) => prismaModel.findUnique({ where: { id } }),
    delete: (id) => prismaModel.delete({ where: { id } }),
    update: (id, data) => prismaModel.update({ where: { id }, data }),
  }
}

// Usage
const movieService = createService<Prisma.MovieCreateInput>('movie')
const serieService = createService<Prisma.SerieCreateInput>('serie')

import { type Prisma, PrismaClient } from '@prisma/client'

const prisma = new PrismaClient()

type CreateFunction<T> = (data: T) => Promise<T>
type GetAllFunction<T> = () => Promise<T[]>
type GetByIdFunction<T> = (id: number) => Promise<T | null>
type DeleteFunction<T> = (id: number) => Promise<T | null>
type UpdateFunction<T> = (id: number, data: T) => Promise<T | null>

interface EntityService<T> {
  create: CreateFunction<T>
  getAll: GetAllFunction<T>
  getById: GetByIdFunction<T>
  delete: DeleteFunction<T>
  update: UpdateFunction<T>
}

const createService = <T>( // This line?
  modelName: Uncapitalize<Prisma.ModelName>,
): EntityService<T> => {
  const prismaModel = prisma[modelName]

  return {
    create: (data) => prismaModel.create({ data }),
    getAll: () => prismaModel.findMany(),
    getById: (id) => prismaModel.findUnique({ where: { id } }),
    delete: (id) => prismaModel.delete({ where: { id } }),
    update: (id, data) => prismaModel.update({ where: { id }, data }),
  }
}

// Usage
const movieService = createService<Prisma.MovieCreateInput>('movie')
const serieService = createService<Prisma.SerieCreateInput>('serie')

Nick•6mo ago

Yeah I have several of these at work, we have about 25 generated routers. It’s a good pattern once you crack the generics stuff

BillyBob•6mo ago

i can put together a stackblitz no problem

Nick•6mo ago

I don’t use Prisma though so I’d need to have a play with a dummy version 😇

BillyBob•6mo ago

yeah i was trying to find some base Prisma delegate verison

const prismaModel: Prisma.MovieDelegate<DefaultArgs> | Prisma.SerieDelegate<DefaultArgs> | Prisma.UserDelegate<DefaultArgs>

to extend from but cannot find anything

Nick•6mo ago

Sometimes you have to F12 into the declarations and really understand what to use that way Prisma must have some common type you can extend from

BillyBob•6mo ago

thats what i was hoping for but cant find it but im very rusty with TS too, had a year off. maybe you can see.

Nick•6mo ago

What about “keyof prisma” If you get the model by key then having a generic key is likely enough to calculate your return type and get the concrete model

BillyBob•6mo ago

does this work? https://stackblitz.com/~/github.com/lwears/ReelScore checking this hm no i need to fix the stackblitz hm, seems prisma cannot run in a webcontainer / stackblitz

Nick•6mo ago

That’s usually okay, we’re looking at types anyway Afraid I’m at work without access for now though so I’ll need to check it out later tonight

BillyBob•6mo ago

no problem, any help appreciated Tried this but still getting the error:

interface Model {
  movie: Movie // Prisma Movie type
  serie: Serie // Prisma serie type
  user: User
}

type ModelName = keyof Model

const createService = (
  modelName: ModelName,
): EntityService<Model[ModelName]> => {
  const prismaModel = prisma[modelName]
  return {
    create: (data) => prismaModel.create({ data }),
    getAll: () => prismaModel.findMany(),
    getById: (id) => prismaModel.findUnique({ where: { id } }),
    delete: (id) => prismaModel.delete({ where: { id } }),
    update: (id, data) => prismaModel.update({ where: { id }, data }),
  }
}

interface Model {
  movie: Movie // Prisma Movie type
  serie: Serie // Prisma serie type
  user: User
}

type ModelName = keyof Model

const createService = (
  modelName: ModelName,
): EntityService<Model[ModelName]> => {
  const prismaModel = prisma[modelName]
  return {
    create: (data) => prismaModel.create({ data }),
    getAll: () => prismaModel.findMany(),
    getById: (id) => prismaModel.findUnique({ where: { id } }),
    delete: (id) => prismaModel.delete({ where: { id } }),
    update: (id, data) => prismaModel.update({ where: { id }, data }),
  }
}

To get the types in stackblitz you need to have a CORS enabling extension installed. CD to apps/api npx prisma generate

BillyBob•6mo ago

https://github.com/prisma/prisma/issues/7187

GitHub

StackBlitz Webcontainer: Prisma fails in multiple ways · Issue #718...

Prisma can be installed in the new StackBlitz Webcontainers with a small workaround of installing a Chrome extension that disables CORS: #7185 (comment) Then you can: Go to https://stackblitz.com/e...

Nick•6mo ago

Yeah this is fairly difficult because they really don't have some generic base class for a Delegate do they? It's definitely possible, just will end up fairly explicit

Nick•6mo ago

What you want from Prisma is a Delegate<T> type but they don't seem to have that https://www.google.com/search?q=prisma+generic+delegate+interface&oq=prisma+generic+delegate+interface&gs_lcrp=EgZjaHJvbWUyCwgAEEUYChg5GKABMgkIARAhGAoYoAHSAQgzNjY3ajBqN6gCALACAA&sourceid=chrome&ie=UTF-8

www.google.com

🔎 prisma generic delegate interface - Google Search

Nick•6mo ago

So you'll end up needing to define your own MyCrudRepository<T> which implements a handful of methods over a given model, and then you type this router with extends MyCrudRepository<TEntity>

BillyBob•6mo ago

ok i think i understand. will give it a shot thanks to be honest it might just be a little too complicated for what i am trying to achieve. I switched from Web Dev to CyberSec a year ago. I'm going to switch back so just want something on my github i can show to recruiters I appreciate your time and help though

Nick•6mo ago

No worries!