Theo's Typesafe Cult•13mo ago

how to handle tRPC errors with mutationAsync on my react frontend?

im trying to convert this component to use tRPC mutation https://pastebin.com/4sJKCULW here is what I have so far https://pastebin.com/6Hph40Ur this is the backend route

    createUser:
        t.procedure
            .input(
                z.object({
                    username: z.string(),
                    password: z.string()
                })
            )
            .mutation(async (opts) => {
                const { input } = opts
                const user = await prisma.user.create({ data: input })
                return user
            }),

    createUser:
        t.procedure
            .input(
                z.object({
                    username: z.string(),
                    password: z.string()
                })
            )
            .mutation(async (opts) => {
                const { input } = opts
                const user = await prisma.user.create({ data: input })
                return user
            }),

I am not getting consistent errors, for example in the screenshots u can see a prisma unique constraint and a zod error from the backend, they both have different structures unfortunately to get the message from the zod, I have to JSON.parse and then do something like message[0].message which doesnt seem intuitive so how would I handle errors in my try catch ? also what type do I give the error block?

        } catch (error: any) {
            console.log("<> <> <> ERROR CAUGHT <> <> <> : ", typeof error, Array.isArray(error))
            console.log(error)
            setCreateFormInfo("error caught: " + error.message)
        }

        } catch (error: any) {
            console.log("<> <> <> ERROR CAUGHT <> <> <> : ", typeof error, Array.isArray(error))
            console.log(error)
            setCreateFormInfo("error caught: " + error.message)
        }

also while im here, how do i get the zod validation from backend to do frontend validation as well before sending fetch? and also doing const data = await res feels wrong to me any tips appreciated in converting this very simple component, thanks

Pastebin

import { useState } from 'react'import { BASE_URL } from '..'interf...

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Pastebin

import { useState } from 'react'import { RouterInputs, trpc } from ...

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3 Replies

Neto•13mo ago

you can use the mutate and not the mutateAsync to gracefully handle errors allowing you to access via f_createUser.isError and f_createUser.error for form validation using zod you can use react-hook-form

Neto•13mo ago

https://github.com/react-hook-form/resolvers#Zod

GitHub

GitHub - react-hook-form/resolvers: 📋 Validation resolvers: Yup, Zo...

📋 Validation resolvers: Yup, Zod, AJV, Joi, Superstruct, Vest, class-validator, io-ts, typanion, Ajv, TypeBox and nope. - GitHub - react-hook-form/resolvers: 📋 Validation resolvers: Yup, Zod, AJV, ...

Neto•13mo ago

the Expected string, received number is self explanatory, somewhere you sent password as a string

Gaming

Programming

how to handle tRPC errors with mutationAsync on my react frontend?