SQLSTATE[HY000]: General error: 1364 Field 'username' doesn't have a default value

Question

你好，我尝试在 laravel 5.8 中创建注册，但是当我尝试注册时出现此错误：

tableuser.php

 public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('username')->unique();
            $table->string('name');
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('password');
            $table->boolean('admin')->default(false);
            $table->rememberToken();
            $table->timestamps();
        });
    }

registe.blade.php

@extends('layouts.app')

@section('content')
<div class="container">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card">
                <div class="card-header">{{ __('Register') }}</div>

                <div class="card-body">
                    <form method="POST" action="{{ route('register') }}">
                        @csrf

                        <div class="form-group row">
                            <label for="username" class="col-md-4 col-form-label text-md-right">{{ __('Username') }}</label>

                            <div class="col-md-6">
                                <input id="username" type="text" class="form-control @error('username') is-invalid @enderror" name="username" value="{{ old('username') }}" required autocomplete="username" autofocus>

                                @error('username')
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $message }}</strong>
                                    </span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label for="name" class="col-md-4 col-form-label text-md-right">{{ __('Name') }}</label>

                            <div class="col-md-6">
                                <input id="name" type="text" class="form-control @error('name') is-invalid @enderror" name="name" value="{{ old('name') }}" required autocomplete="name" autofocus>

                                @error('name')
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $message }}</strong>
                                    </span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label for="email" class="col-md-4 col-form-label text-md-right">{{ __('E-Mail Address') }}</label>

                            <div class="col-md-6">
                                <input id="email" type="email" class="form-control @error('email') is-invalid @enderror" name="email" value="{{ old('email') }}" required autocomplete="email">

                                @error('email')
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $message }}</strong>
                                    </span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label for="password" class="col-md-4 col-form-label text-md-right">{{ __('Password') }}</label>

                            <div class="col-md-6">
                                <input id="password" type="password" class="form-control @error('password') is-invalid @enderror" name="password" required autocomplete="new-password">

                                @error('password')
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $message }}</strong>
                                    </span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label for="password-confirm" class="col-md-4 col-form-label text-md-right">{{ __('Confirm Password') }}</label>

                            <div class="col-md-6">
                                <input id="password-confirm" type="password" class="form-control" name="password_confirmation" required autocomplete="new-password">
                            </div>
                        </div>

                        <div class="form-group row mb-0">
                            <div class="col-md-6 offset-md-4">
                                <button type="submit" class="btn btn-primary">
                                    {{ __('Register') }}
                                </button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

SQLSTATE[HY000]: General error: 1364 Field 'username' doesn't have a default value (SQL: insert into users (name, email, password, updated_at, created_at) values (denden73, denden73@gmail.com, y$x.J7316.UH.UFnzZaeI5F.TTXkYyd.xVUlrjV6EoHA7J88R0X9Ode, 2019-07-25 12:50:54, 2019-07-25 12:50:54))

Answer 1

尝试将此添加到您的 User.php 模型文件

protected fillable = ['username', 'email', 'password'];

Answer 2

请确保您已遵守此规则。

1) 迁移时使用 nullable()。

-> 这是因为当您插入任何记录时，如果未设置字段值，则会发生此错误。

$table->string('username')->nullable();

2) 可在您的模型中填充。

-> 如果您没有将 nullable 设置为列，现在在插入记录时您尝试插入值，但如果该值在模型中不可填充，那么它不会插入，所以它会发生此错误。

protected $fillable = [
    'username', 'name', 'email','password','admin'
];

3) 创建新用户时提及用户名。

-> 有时您在创建时错误地没有传递该值，因此如果该字段在 MySQL 中不为空，则会发生此错误。

$user = new App\User;
$user->username = 'xyz';
$user->save();

Answer 3

您的插入查询如下：

DB::table('users')->insert(array('username'=>$request->username,'name'=>$request->name,'email'=>$request->email,'password'=>$request->password));