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【Next.js】基礎から始めるNext.js API Routes【23Login Form】

2023/01/01に公開約3,600字

【23Login Form】

YouTube: https://youtu.be/JPp3eJ0n0SM

https://youtu.be/JPp3eJ0n0SM

今回はログインフォームを作成します。

前回「[...nextauth].js」の3行目「import prisma from '../../../utils/prismaClient'」
こちらの「prisma」の部分に波かっこが必要でしたので、
まずはこちらの修正から行います。

pages/api/auth/[...nextauth].js
import NextAuth from 'next-auth'
import CredentialsProvider from 'next-auth/providers/credentials'
import { prisma } from '../../../utils/prismaClient'

export default NextAuth({
  providers: [
    CredentialsProvider({
      name: 'Credentials',
      async authorize(credentials) {
        const result = await prisma.user.findUnique({
          where: {
            email: credentials.email,
          },
        })
        if (!result) {
          return null
        }
        if (credentials.password !== result.password) {
          throw new Error('Password wrong')
        }
        return result
      },
    }),
  ],
  secret: 'secretKey',
  session: {
    strategy: 'jwt',
  },
  jwt: {
    secret: 'secretKey',
  },
  callbacks: {
    async jwt({ token, user, account, profile, isNewUser }) {
      console.log('token :', token)
      console.log('user :', user)
      console.log('account :', account)
      console.log('profile :', profile)
      console.log('isNewUser :', isNewUser)
      return token
    },
    async session({ session, token, user }) {
      console.log('session :', session)
      console.log('token :', token)
      console.log('user :', user)
      return session
    },
  },
})
pages/Login.tsx
import Layout from '../components/Layout'
import RegisterForm from '../components/RegisterForm'

export default function LoginPage() {
  return (
    <Layout>
      <div className="flex flex-col justify-center items-center">
        <h2 className="text-4xl font-black font-sans p-4 mt-6">Login Form</h2>
        <RegisterForm />
      </div>
    </Layout>
  )
}
components/LoginForm.tsx
import { Button, Label, TextInput } from 'flowbite-react'
import { ChangeEvent, SyntheticEvent, useState } from 'react'

const LoginForm = () => {
  const [formData, setFormData] = useState({
    email: '',
    password: '',
  })

  const handleChange = (e: ChangeEvent<HTMLInputElement>) => {
    const { value, name } = e.target
    setFormData({ ...formData, [name]: value })
  }

  const handleSubmit = async (e: SyntheticEvent) => {
    e.preventDefault()
    const res = await fetch('/api/users', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify(formData),
    })

    if (res.status === 200) {
      const user = await res.json()
      console.log(user)
    } else {
      console.log(`${res.status} something went wrong`)
    }
    // alert(JSON.stringify(formData))
  }

  return (
    <div className="w-60">
      <form onSubmit={handleSubmit} className="flex flex-col gap-4">
        <div>
          <div className="mb-2 block">
            <Label htmlFor="email1" value="Your email" />
          </div>
          <TextInput
            id="email1"
            type="email"
            name="email"
            value={formData.email}
            onChange={handleChange}
            required={true}
          />
        </div>
        <div>
          <div className="mb-2 block">
            <Label htmlFor="password1" value="Your password" />
          </div>
          <TextInput
            id="password1"
            type="password"
            name="password"
            value={formData.password}
            onChange={handleChange}
            required={true}
          />
        </div>

        <Button type="submit">Login</Button>
      </form>
    </div>
  )
}

export default LoginForm

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