[ADVANCED] Prisma Extensions - dynamic typing

I'm trying to create a $allModels extension with proper typing and have been struggling.

This is what I was able to cobble together:

model: {
      $allModels:{
        async findOrCreate<T>(
          this: T,
          query: Prisma.Args<T, 'create'>['data']
        ):Promise< Prisma.Result<T, undefined, 'findFirstOrThrow'> >{
          const ctx = Prisma.getExtensionContext(this);
          let record = await (ctx as any).findFirst({where:query});
          if(!record)
            record = await (ctx as any).create({data:query});
          return record;
        },
      }
}

model: {
      $allModels:{
        async findOrCreate<T>(
          this: T,
          query: Prisma.Args<T, 'create'>['data']
        ):Promise< Prisma.Result<T, undefined, 'findFirstOrThrow'> >{
          const ctx = Prisma.getExtensionContext(this);
          let record = await (ctx as any).findFirst({where:query});
          if(!record)
            record = await (ctx as any).create({data:query});
          return record;
        },
      }
}

There are a few issues I want to resolve here:
1) There has to be some better typing for the ctx (or accessing the parent model).
2) I want to have an includes parameter, and return dynamic typing much like a regular .findFirst query. How can I achieve this? The only thing I can think of is that undefined Result generic which i can't seem to figure out what it does.

Thanks

Prisma•2y ago•

2 replies

Nik

[ADVANCED] Prisma Extensions - dynamic typing

I'm trying to create a $allModels extension with proper typing and have been struggling.

This is what I was able to cobble together:

model: {
      $allModels:{
        async findOrCreate<T>(
          this: T,
          query: Prisma.Args<T, 'create'>['data']
        ):Promise< Prisma.Result<T, undefined, 'findFirstOrThrow'> >{
          const ctx = Prisma.getExtensionContext(this);
          let record = await (ctx as any).findFirst({where:query});
          if(!record)
            record = await (ctx as any).create({data:query});
          return record;
        },
      }
}

model: {
      $allModels:{
        async findOrCreate<T>(
          this: T,
          query: Prisma.Args<T, 'create'>['data']
        ):Promise< Prisma.Result<T, undefined, 'findFirstOrThrow'> >{
          const ctx = Prisma.getExtensionContext(this);
          let record = await (ctx as any).findFirst({where:query});
          if(!record)
            record = await (ctx as any).create({data:query});
          return record;
        },
      }
}

[ADVANCED] Prisma Extensions - dynamic typing

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