Setting up Next.js
First run the following command to initialize the next js project with supabase, typescript, and tailwind: npx create-next-app@latest. Select all of the default options:
Setting up Prisma
Run the following command to install prisma:
npm install prisma --save-dev
Once prisma is installed run the following command to initialize the schema file and the .env file:
npx prisma init
There should now be a .env file. You should add your database_url to connect prisma to your database. Should look like this:
// .env
DATABASE_URL=url
Inside your schema.prisma you should add your model, i am just using some random model for now:
generator client {
provider = "prisma-client-js"
}
datasource db {
provider = "postgresql"
url = env("DATABASE_URL")
}
model Post {
id String @default(cuid()) @id
title String
content String?
published Boolean @default(false)
author User? @relation(fields: [authorId], references: [id])
authorId String?
}
model User {
id String @default(cuid()) @id
name String?
email String? @unique
createdAt DateTime @default(now()) @map(name: "created_at")
updatedAt DateTime @updatedAt @map(name: "updated_at")
posts Post[]
@@map(name: "users")
}
Now you can run the following command to sync your database with your schema:
npx prisma db push
In order to access prisma on the client side you need to install prisma client. You can do so by running the following command:
npm install @prisma/client
Your client must be in sync with your schema as well and you can do this by running the following command:
npx prisma generate
When you run npx prisma db push the generate command is automatically called.
In order to access the prisma client you need to create an instance of it, so create a new folder in the src directory called lib, and add a new file called prisma.ts to it.
// prisma.ts
import { PrismaClient } from "@prisma/client";
const prisma = new PrismaClient();
export default prisma;
Now you can import the same instance of Prisma in any file.
Setting up Shadcn
First run the following command to start setting up shadcn:
npx shadcn-ui@latest init
I selected the following options: typescript: yes style: default base color: slate global css: src/app/globals.css css variables: yes tailwind config: tailwind.config.ts components: @/components (default) utils: @/lib/utils (default) react server components: yes write to components.json: yes
Next run the following command to set up next themes:
npm install next-themes
Then add a file called theme-provider.tsx to your components library and add the following code:
// theme-provider.tsx
"use client";
import * as React from "react";
import { ThemeProvider as NextThemesProvider } from "next-themes";
import { type ThemeProviderProps } from "next-themes/dist/types";
export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
}
Once you have your provider setup, you want to add it to the layout.tsx so it is implemented on the entire app. Wrap the {children} with the Theme provider like this:
// layout.tsx
return (
<html lang="en" suppressHydrationWarning>
<body className={inter.className}>
<ThemeProvider
attribute="class"
defaultTheme="system"
enableSystem
disableTransitionOnChange
>
{children}
</ThemeProvider>
</body>
</html>
);
Now go to the shadcn themes page. And select the theme you want to use and press copy code. Then add that copied code to your globals.css so it looks like this:
// globals.css
@tailwind base;
@tailwind components;
@tailwind utilities;
@layer base {
:root {
--background: 0 0% 100%;
--foreground: 224 71.4% 4.1%;
--card: 0 0% 100%;
--card-foreground: 224 71.4% 4.1%;
--popover: 0 0% 100%;
--popover-foreground: 224 71.4% 4.1%;
--primary: 262.1 83.3% 57.8%;
--primary-foreground: 210 20% 98%;
--secondary: 220 14.3% 95.9%;
--secondary-foreground: 220.9 39.3% 11%;
--muted: 220 14.3% 95.9%;
--muted-foreground: 220 8.9% 46.1%;
--accent: 220 14.3% 95.9%;
--accent-foreground: 220.9 39.3% 11%;
--destructive: 0 84.2% 60.2%;
--destructive-foreground: 210 20% 98%;
--border: 220 13% 91%;
--input: 220 13% 91%;
--ring: 262.1 83.3% 57.8%;
--radius: 0.5rem;
}
.dark {
--background: 224 71.4% 4.1%;
--foreground: 210 20% 98%;
--card: 224 71.4% 4.1%;
--card-foreground: 210 20% 98%;
--popover: 224 71.4% 4.1%;
--popover-foreground: 210 20% 98%;
--primary: 263.4 70% 50.4%;
--primary-foreground: 210 20% 98%;
--secondary: 215 27.9% 16.9%;
--secondary-foreground: 210 20% 98%;
--muted: 215 27.9% 16.9%;
--muted-foreground: 217.9 10.6% 64.9%;
--accent: 215 27.9% 16.9%;
--accent-foreground: 210 20% 98%;
--destructive: 0 62.8% 30.6%;
--destructive-foreground: 210 20% 98%;
--border: 215 27.9% 16.9%;
--input: 215 27.9% 16.9%;
--ring: 263.4 70% 50.4%;
}
}
Now you should be able to use shadcn components and themes in your project.
Setting up Supabase
The first step is to create a new supabase project. Next, install the next.js auth helpers library:
npm install @supabase/auth-helpers-nextjs @supabase/supabase-js
Now you must add your supabase url and your anon key to your .env file. Your .env file should now look like this:
// .env
DATABASE_URL=url
NEXT_PUBLIC_SUPABASE_URL=your-supabase-url
NEXT_PUBLIC_SUPABASE_ANON_KEY=your-supabase-anon-key
We are going to use the supabase cli to generate types based on our schema. Install the cli with the following command:
npm install supabase --save-dev
In order to login to supabase run npx supabase login and it will automatically log you in.
Now we can generate our types by running the following command:
npx supabase gen types typescript --project-id YOUR_PROJECT_ID > src/lib/database.types.ts which should add a new file in your lib folder with the types based on your schema.
Now create a middleware.ts file in the root of your project and add the following code:
import { createMiddlewareClient } from "@supabase/auth-helpers-nextjs";
import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import type { Database } from "@/lib/database.types";
export async function middleware(req: NextRequest) {
const res = NextResponse.next();
const supabase = createMiddlewareClient<Database>({ req, res });
await supabase.auth.getSession();
return res;
}
Now create a new folder in the app directory called auth, then another folder within auth called callback, and finally a file called route.ts. Add the following code in that file:
// app/auth/callback/route.ts
import { createRouteHandlerClient } from "@supabase/auth-helpers-nextjs";
import { cookies } from "next/headers";
import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import type { Database } from "@/lib/database.types";
export async function GET(request: NextRequest) {
const requestUrl = new URL(request.url);
const code = requestUrl.searchParams.get("code");
if (code) {
const cookieStore = cookies();
const supabase = createRouteHandlerClient<Database>({
cookies: () => cookieStore,
});
await supabase.auth.exchangeCodeForSession(code);
}
// URL to redirect to after sign in process completes
return NextResponse.redirect(requestUrl.origin);
}
With that setup we can create a login page. In the app directory create a new folder called login with a page.tsx.
// app/login/page.tsx
"use client";
import { createClientComponentClient } from "@supabase/auth-helpers-nextjs";
import { useRouter } from "next/navigation";
import { useState } from "react";
import type { Database } from "@/lib/database.types";
export default function Login() {
const [email, setEmail] = useState("");
const [password, setPassword] = useState("");
const router = useRouter();
const supabase = createClientComponentClient<Database>();
const handleSignUp = async () => {
await supabase.auth.signUp({
email,
password,
options: {
emailRedirectTo: `${location.origin}/auth/callback`,
},
});
router.refresh();
};
const handleSignIn = async () => {
await supabase.auth.signInWithPassword({
email,
password,
});
router.refresh();
};
const handleSignOut = async () => {
await supabase.auth.signOut();
router.refresh();
};
return (
<>
<input
name="email"
onChange={(e) => setEmail(e.target.value)}
value={email}
/>
<input
type="password"
name="password"
onChange={(e) => setPassword(e.target.value)}
value={password}
/>
<button onClick={handleSignUp}>Sign up</button>
<button onClick={handleSignIn}>Sign in</button>
<button onClick={handleSignOut}>Sign out</button>
</>
);
}
Now create a new folder within the auth directory called sign-up, and a route.ts within that file. Add the following code:
// app/auth/sign-up/route.ts
import { createRouteHandlerClient } from "@supabase/auth-helpers-nextjs";
import { cookies } from "next/headers";
import { NextResponse } from "next/server";
import type { Database } from "@/lib/database.types";
export async function POST(request: Request) {
const requestUrl = new URL(request.url);
const formData = await request.formData();
const email = String(formData.get("email"));
const password = String(formData.get("password"));
const cookieStore = cookies();
const supabase = createRouteHandlerClient<Database>({
cookies: () => cookieStore,
});
await supabase.auth.signUp({
email,
password,
options: {
emailRedirectTo: `${requestUrl.origin}/auth/callback`,
},
});
return NextResponse.redirect(requestUrl.origin, {
status: 301,
});
}
Create another folder in the same location called login.
// app/auth/login/route.ts
import { createRouteHandlerClient } from "@supabase/auth-helpers-nextjs";
import { cookies } from "next/headers";
import { NextResponse } from "next/server";
import type { Database } from "@/lib/database.types";
export async function POST(request: Request) {
const requestUrl = new URL(request.url);
const formData = await request.formData();
const email = String(formData.get("email"));
const password = String(formData.get("password"));
const cookieStore = cookies();
const supabase = createRouteHandlerClient<Database>({
cookies: () => cookieStore,
});
await supabase.auth.signInWithPassword({
email,
password,
});
return NextResponse.redirect(requestUrl.origin, {
status: 301,
});
}
And finally add a logout route in the same place.
// app/auth/logout/route.ts
import { createRouteHandlerClient } from "@supabase/auth-helpers-nextjs";
import { cookies } from "next/headers";
import { NextResponse } from "next/server";
import type { Database } from "@/lib/database.types";
export async function POST(request: Request) {
const requestUrl = new URL(request.url);
const cookieStore = cookies();
const supabase = createRouteHandlerClient<Database>({
cookies: () => cookieStore,
});
await supabase.auth.signOut();
return NextResponse.redirect(`${requestUrl.origin}/login`, {
status: 301,
});
}
Now there should be basic login logout sign up functionality when you navigate to localhost http://localhost:3000/login.
Now we have some basic boilerplate for a next js app with prisma shadcn and supabase auth setup.