2 replies

Sharing Logic Across TRPC Procedures

I've got multiple procedures that need to share logic. For example, I've got a query and a mutation that both return a

lastUpdatedBy

lastUpdatedBy

field. Instead of returning the user id, I return their name.
Technically, I've been able to write the code within both the query and mutation, but I'm struggling to find a way to share that logic.

The main issue is really a Typescript one where I can't figure out how to

  getSomething: protectedProcedure
    .input(z.object({ id: z.string() }))
    .query(async ({ ctx, input }) => {
      let something = await ctx.db.somethings.findUnique({
        where: {
          id: parseInt(input.id),
        },
      });

      // here's where I want to write some shared logic
      something = await processSomething({ something, db: ctx.db });

  getSomething: protectedProcedure
    .input(z.object({ id: z.string() }))
    .query(async ({ ctx, input }) => {
      let something = await ctx.db.somethings.findUnique({
        where: {
          id: parseInt(input.id),
        },
      });

      // here's where I want to write some shared logic
      something = await processSomething({ something, db: ctx.db });

The challenge I'm stuck on is figuring out the types in my util. I was able to get the prisma types, but not the

something

something

types.

type Props = {
  db: PrismaClient<Prisma.PrismaClientOptions, never, DefaultArgs>;
  something: ???
}
function processSomething({something, db}: Props) {}

type Props = {
  db: PrismaClient<Prisma.PrismaClientOptions, never, DefaultArgs>;
  something: ???
}
function processSomething({something, db}: Props) {}

I've tried this approach https://trpc.io/docs/client/vanilla/infer-types with something like

type RouterOutput = inferRouterOutputs<AppRouter>;
type Home = RouterOutput["something"]["getSomething"];

type RouterOutput = inferRouterOutputs<AppRouter>;
type Home = RouterOutput["something"]["getSomething"];

But that produces an error

'something' is referenced directly or indirectly in its own type annotation.

Any suggestions? thanks!

Inferring Types | tRPC

It is often useful to access the types of your API within your clients. For this purpose, you are able to infer the types contained in your AppRouter.

Sharing Logic Across TRPC Procedures

I've got multiple procedures that need to share logic. For example, I've got a query and a mutation that both return a

lastUpdatedBy

lastUpdatedBy

  getSomething: protectedProcedure
    .input(z.object({ id: z.string() }))
    .query(async ({ ctx, input }) => {
      let something = await ctx.db.somethings.findUnique({
        where: {
          id: parseInt(input.id),
        },
      });

      // here's where I want to write some shared logic
      something = await processSomething({ something, db: ctx.db });

  getSomething: protectedProcedure
    .input(z.object({ id: z.string() }))
    .query(async ({ ctx, input }) => {
      let something = await ctx.db.somethings.findUnique({
        where: {
          id: parseInt(input.id),
        },
      });

      // here's where I want to write some shared logic
      something = await processSomething({ something, db: ctx.db });

The challenge I'm stuck on is figuring out the types in my util. I was able to get the prisma types, but not the

something

something

types.

type Props = {
  db: PrismaClient<Prisma.PrismaClientOptions, never, DefaultArgs>;
  something: ???
}
function processSomething({something, db}: Props) {}

type Props = {
  db: PrismaClient<Prisma.PrismaClientOptions, never, DefaultArgs>;
  something: ???
}
function processSomething({something, db}: Props) {}

I've tried this approach https://trpc.io/docs/client/vanilla/infer-types with something like

type RouterOutput = inferRouterOutputs<AppRouter>;
type Home = RouterOutput["something"]["getSomething"];

type RouterOutput = inferRouterOutputs<AppRouter>;
type Home = RouterOutput["something"]["getSomething"];

But that produces an error

'something' is referenced directly or indirectly in its own type annotation.

Any suggestions? thanks!

Inferring Types | tRPC

It is often useful to access the types of your API within your clients. For this purpose, you are able to infer the types contained in your AppRouter.

Sharing Logic Across TRPC Procedures

Sharing Logic Across TRPC Procedures

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