Modifying input in a middleware

Is it possible to modify input somewhere so that I can do something like this

const signIn = deskOrAdminProcedure
  .input(
    z.object({
      name: LocationNameSchema,
      ucard_number: z
        .string()
        .regex(/\d{9,}/),
      data: CreateSignInSchema.extend({
        reason_id: z.string(),
      }),
    }),
  )
  .mutation(async ({ input, ctx: { db, logger } }) => {
    const { user, name, data } = await ensureUser(input, { db });

const signIn = deskOrAdminProcedure
  .input(
    z.object({
      name: LocationNameSchema,
      ucard_number: z
        .string()
        .regex(/\d{9,}/),
      data: CreateSignInSchema.extend({
        reason_id: z.string(),
      }),
    }),
  )
  .mutation(async ({ input, ctx: { db, logger } }) => {
    const { user, name, data } = await ensureUser(input, { db });

as just

const signIn = deskOrAdminProcedure
  .input(
    z.object({
      name: LocationNameSchema,
      ucard_number: z
        .string()
        .regex(/\d{9,}/)
        .transform(ldapLibraryToUcardNumber),
      data: CreateSignInSchema.extend({
        reason_id: z.string(),
      }),
    }),
  )
  // ... IDK what but inject ensureUser and db
  .mutation(async ({ { user, name, data }, ctx: { db, logger } }) => {

const signIn = deskOrAdminProcedure
  .input(
    z.object({
      name: LocationNameSchema,
      ucard_number: z
        .string()
        .regex(/\d{9,}/)
        .transform(ldapLibraryToUcardNumber),
      data: CreateSignInSchema.extend({
        reason_id: z.string(),
      }),
    }),
  )
  // ... IDK what but inject ensureUser and db
  .mutation(async ({ { user, name, data }, ctx: { db, logger } }) => {

Solution:

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6 Replies

Alex / KATT 🐱•2d ago

sorry, what are you trying to do? .transform() should work

Gobot1234OP•2d ago

i originally had .transform but I can't do that cause I don't have access to context

Alex / KATT 🐱•2d ago

aha, you want access to context in ~~middleware~~ the input that's not possible unfortunately, but you can do a reusable part of it

Alex / KATT 🐱•2d ago

https://x.com/alexdotjs/status/1839265630983213432

Alex / KATT 🐱 (@alexdotjs) on X

Middlewares in tRPC 📗 Base procedures Most apps should only have a few base procedures that cover 99% of the app's use cases - In the below example, I have: 1. A public base procedure with logging 2. An authed base procedure that extends ^ 3. An organization procedure that

Solution

Alex / KATT 🐱•2d ago

Gobot1234OP•2d ago

so a procedure with custom context is the best option? i was either thinking that or a wrapper function would do it

Modifying input in a middleware

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