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How can i hande errors nextjs + prisma

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Sun bear posted this in #help-forum
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Sun bearOP
I still dont understand where should i write my error handling logic
i have api folder where i am write prisma queries
then i am using fetch in some specifi function and then
i use react to handle this data

6 Replies

Sun bearOP
import { prisma } from "@/lib/prisma";
import { NextResponse } from "next/server";

function getUserById(id: string) {
  return prisma.user.findUnique({
    where: {
      id: id,
    },
  });
}

export async function GET(
  request: Request,
  { params }: { params: { id: string } }
) {
  try {
    const user = await getUserById(params.id);
    if (!user) {
      return NextResponse.json({ error: "User not found." }, { status: 404 });
    }
    return NextResponse.json({ user });
  } catch (error) {
    return NextResponse.json(
      { error: "Could not fetch user." },
      { status: 500 }
    );
  }
}

export async function DELETE(
  request: Request,
  { params }: { params: { id: string } }
) {
  try {
    let user = await getUserById(params.id);
    if (!user) {
      return NextResponse.json({ error: "User not found." }, { status: 404 });
    }
    user = await prisma.user.delete({
      where: {
        id: params.id,
      },
    });
    return NextResponse.json({ user });
  } catch (error) {
    return NextResponse.json(
      { error: "Could not delete user." },
      { status: 500 }
    );
  }
}

export async function PUT(
  request: Request,
  { params }: { params: { id: string } }
) {
  const { name } = (await request.json()) as {
    name: string;
  };
  try {
    let user = await getUserById(params.id);
    if (!user) {
      return NextResponse.json({ error: "User not found." }, { status: 404 });
    }
    user = await prisma.user.update({
      where: {
        id: params.id,
      },
      data: {
        name,
      },
    });
    return NextResponse.json({ user });
  } catch (error) {
    return NextResponse.json(
      { error: "Could not update user." },
      { status: 500 }
    );
  }
}
i dont think this code is good
how can i improve it
i mean i dont like that i write try catch in 3 places
on api, on function and on client
not-milo.tsx
The first try-cath block is not really necessary. Prisma won't throw an error if there’s no data.

But to be safe in case something else happens you can move the try-catch logic directly inside your getUserById function to avoid repeating it every time you need to use that function.