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•Created by Nivoa on 6/16/2024 in #❓-help

When a procedure returns an instance of a class, the superjson isApplicable doesnt detect it

When a procedure returns an instance of a class, the superjson isApplicable doesnt detect it as that class, but when you return it inside an object or array, it does.

// ❌
class Test {
        a: string;
        constructor() {
          this.a = "a";
        }
        serialize() {
          return "a"
        }
        deserialize() {
          return "b"
        }
      }
test: publicProcedure
    .query(async ({ input, ctx }) => {
      return new Test()
    }),

// ❌
class Test {
        a: string;
        constructor() {
          this.a = "a";
        }
        serialize() {
          return "a"
        }
        deserialize() {
          return "b"
        }
      }
test: publicProcedure
    .query(async ({ input, ctx }) => {
      return new Test()
    }),

// ✅
test: publicProcedure
    .query(async ({ input, ctx }) => {
      return { test: new Test() }
    }),

// ✅
test: publicProcedure
    .query(async ({ input, ctx }) => {
      return { test: new Test() }
    }),

then in superjson:

superjson.registerCustom(
  {
    deserialize: (test) => {
      return null;
    },
    serialize: (test) => {
      return null;
    },
    isApplicable: (val: unknown) => {
      return val instanceof Test
    },
  },
  "Test",
);

superjson.registerCustom(
  {
    deserialize: (test) => {
      return null;
    },
    serialize: (test) => {
      return null;
    },
    isApplicable: (val: unknown) => {
      return val instanceof Test
    },
  },
  "Test",
);

what happens is that val is never an actual instanceof Test, it is an object with the properties of Test, but not the instance itself. But when I return it as the 2nd procedure, val.test instanceof Test evals to true. is this a bug?

10 replies

TtRPC

•Created by Nivoa on 6/9/2024 in #❓-help

How to set up custom response headers at procedure level

hello guys, i'd like to know how to set up custom headers per procedure. I am aware of the responseMeta, but thats general. I'd like something more fine-grained. Something like this but doesnt work:

getPoolByPoolId: publicProcedure.query(async ({ ctx }) => {
    const pool = await ctx.raydiumClient.fetchJupTokenList(
      JupTokenType.Strict,
      true,
    );
    // ctx.headers["Cache-Controlz"] = "public, max-age=600";
    if ("headers" in ctx) {
      ctx.headers.append("x-test-Control", "public, max-age=600");
      console.log("ctx.headers", ctx.headers);
    }
    return pool;
  }),

getPoolByPoolId: publicProcedure.query(async ({ ctx }) => {
    const pool = await ctx.raydiumClient.fetchJupTokenList(
      JupTokenType.Strict,
      true,
    );
    // ctx.headers["Cache-Controlz"] = "public, max-age=600";
    if ("headers" in ctx) {
      ctx.headers.append("x-test-Control", "public, max-age=600");
      console.log("ctx.headers", ctx.headers);
    }
    return pool;
  }),

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