我正在使用 laravel 6.2，连接是 SQL。我正在创建两个具有“一对多关系”的表。表 'users' 和 'managers'，其中每个用户将有一个经理，每个经理将有多个用户。
下面是用户表迁移：
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateUsersTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->string('password');
$table->rememberToken();
$table->integer('totalBalance')->default(21);
$table->integer('annualBalance')->default(15);
$table->integer('casualBalance')->default(6);
$table->timestamps();
});
Schema::table('users', function (Blueprint $table) {
$table->bigInteger('manager_id')->unsigned()->index();
$table->foreign('manager_id')->references('id')->on('managers')
->onDelete('cascade');
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('users');
}
}
以下是经理迁移表：
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateManagersTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('managers', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('managers');
}
}
以下是用户模型：
<?php
namespace App;
use Tymon\JWTAuth\Contracts\JWTSubject;
use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
class User extends Authenticatable implements JWTSubject
{
use Notifiable;
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = [
'name', 'email', 'password',
];
/**
* The attributes that should be hidden for arrays.
*
* @var array
*/
protected $hidden = [
'password', 'remember_token',
];
/**
* The attributes that should be cast to native types.
*
* @var array
*/
protected $casts = [
'email_verified_at' => 'datetime',
];
// Rest omitted for brevity
/**
* Get the identifier that will be stored in the subject claim of the JWT.
*
* @return mixed
*/
public function getJWTIdentifier()
{
return $this->getKey();
}
/**
* Return a key value array, containing any custom claims to be added to the JWT.
*
* @return array
*/
public function getJWTCustomClaims()
{
return [];
}
public function setPasswordAttribute($value) {
$this->attributes['password'] = bcrypt($value);
}
public function manager()
{
return $this->belongsTo('App\Manager');
}
}
以下是经理模型：
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Manager extends Model
{
protected $primaryKey = 'id';
public function users()
{
return $this->hasMany('App\User');
}
}
我收到以下错误：
我已经尝试了很多东西，我从网上的其他问题中看到，包括更改 id 的类型（从 BigInteger 和整数，以及将 database.php 中的引擎更改为“InnoDB”，并将用户模型分为两部分（第二部分用于添加外键）。
我在网上看到的一件事（但没有弄清楚如何实现）是更改时间戳的顺序，因为其他一些人认为此错误可能与此有关。
有什么建议吗？