Theo's Typesafe Cult•13mo ago

How to create an object with a mutation. Getting React error `Invalid hook call`

Hi, would be great if I could some help here 🙂 Here is my userRouter, getAll already works without issues. However I dont manage to create objects in my database.

import { createTRPCRouter, publicProcedure } from "../trpc";

export const userRouter = createTRPCRouter({
  create: publicProcedure.mutation(async ({ ctx }) => {
    return await ctx.prisma.user.create({
      data: {
        email: "create@test.com",
        firstName: "Peter",
        lastName: "Hansen",
        role: "MANAGER",
        clientId: "clhg7tzgz0000nhp0zwfmc0jm",
      },
    });
  }),

  getAll: publicProcedure.query(({ ctx }) => {
    return ctx.prisma.user.findMany();
  }),
});

import { createTRPCRouter, publicProcedure } from "../trpc";

export const userRouter = createTRPCRouter({
  create: publicProcedure.mutation(async ({ ctx }) => {
    return await ctx.prisma.user.create({
      data: {
        email: "create@test.com",
        firstName: "Peter",
        lastName: "Hansen",
        role: "MANAGER",
        clientId: "clhg7tzgz0000nhp0zwfmc0jm",
      },
    });
  }),

  getAll: publicProcedure.query(({ ctx }) => {
    return ctx.prisma.user.findMany();
  }),
});

I have a "Create" Page where I get an error when I try to use the mutation to create a User in the database.

import { type NextPage } from "next";
import Header from "~/components/Header/Header";
import { api } from "~/utils/api";

const Create: NextPage = () => {
  const createUser = () => {
    api.users.create.useMutation();
  };
  return (
    <>
      <Header header="Create" />
      <p>Create new Users here!</p>
      <button onClick={() => createUser()}>Click Me</button>
    </>
  );
};

export default Create;

import { type NextPage } from "next";
import Header from "~/components/Header/Header";
import { api } from "~/utils/api";

const Create: NextPage = () => {
  const createUser = () => {
    api.users.create.useMutation();
  };
  return (
    <>
      <Header header="Create" />
      <p>Create new Users here!</p>
      <button onClick={() => createUser()}>Click Me</button>
    </>
  );
};

export default Create;

The error I get is

Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:

Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:

I appreciate any help I can get, thank you!

1 Reply

clemwo•13mo ago

I found the solution to the issue here: https://discord.com/channels/966627436387266600/1097508051747082260/1097509504486211644 My code now works like this:

import { type NextPage } from "next";
import Header from "~/components/Header/Header";
import { api } from "~/utils/api";

const Create: NextPage = () => {
  const { mutate } = api.users.create.useMutation();

  return (
    <>
      <Header header="Create" />
      <p>Create new Users here!</p>
      <button onClick={() => mutate()}>Click Me</button>
    </>
  );
};

export default Create;

import { type NextPage } from "next";
import Header from "~/components/Header/Header";
import { api } from "~/utils/api";

const Create: NextPage = () => {
  const { mutate } = api.users.create.useMutation();

  return (
    <>
      <Header header="Create" />
      <p>Create new Users here!</p>
      <button onClick={() => mutate()}>Click Me</button>
    </>
  );
};

export default Create;

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How to create an object with a mutation. Getting React error `Invalid hook call`