TTC
Theo's Typesafe Cult•3y ago
4b47

Error function trpc

Okay, so im kinda new to trpc stuff and not that familiar with that. I want to throw error on backend when Email is not unique. So when i write it like this in my router it works great, it throws that error:
registerUser: publicProcedure
    .input(z.object({ email: z.string(), password: z.string() }))
    .mutation(async ({ input, ctx }) => {
      const user = await ctx.prisma.user.findUnique({
        where: {
          email: input.email,
        },
      });
      if (user) {
        throw new TRPCError({
          code: "CONFLICT",
          message: "Email is already used.",
        });
      }
      const newlyCreatedUser = await ctx.prisma.user.create({
        data: input,
      });
      return newlyCreatedUser;
    }),
});
registerUser: publicProcedure
    .input(z.object({ email: z.string(), password: z.string() }))
    .mutation(async ({ input, ctx }) => {
      const user = await ctx.prisma.user.findUnique({
        where: {
          email: input.email,
        },
      });
      if (user) {
        throw new TRPCError({
          code: "CONFLICT",
          message: "Email is already used.",
        });
      }
      const newlyCreatedUser = await ctx.prisma.user.create({
        data: input,
      });
      return newlyCreatedUser;
    }),
});
but wanted to do it in more elegant way, and use util function like this 
import { TRPCError } from "@trpc/server";

export const isUniqueEmail = async (ctx: any, passedEmail: string) => {
  const email = await ctx.prisma.user.findUnique({
    where: {
      email: passedEmail,
    },
  });
  if (email) {
    throw new TRPCError({ code: "CONFLICT" });
  }
};
import { TRPCError } from "@trpc/server";

export const isUniqueEmail = async (ctx: any, passedEmail: string) => {
  const email = await ctx.prisma.user.findUnique({
    where: {
      email: passedEmail,
    },
  });
  if (email) {
    throw new TRPCError({ code: "CONFLICT" });
  }
};
and 
export const userRouter = createTRPCRouter({
  registerUser: publicProcedure
    .input(z.object({ email: z.string(), password: z.string() }))
    .mutation(async ({ input, ctx }) => {
      isUniqueEmail(ctx, input.email)
      const newlyCreatedUser = await ctx.prisma.user.create({
        data: input,
      });
      return newlyCreatedUser;
    }),
});
export const userRouter = createTRPCRouter({
  registerUser: publicProcedure
    .input(z.object({ email: z.string(), password: z.string() }))
    .mutation(async ({ input, ctx }) => {
      isUniqueEmail(ctx, input.email)
      const newlyCreatedUser = await ctx.prisma.user.create({
        data: input,
      });
      return newlyCreatedUser;
    }),
});
, but then i just got error i assume from that unique field in db and got 500, not my desired error which i throw in util function. What is wrong? also, dont really know how to type ctx in util function. Thanks
1 Reply
Unknown User
Unknown User•3y ago
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