您好，我正在嘗試用假數(shù)據(jù)填充我的數(shù)據(jù)庫。為此，我有 2 個模型：用戶和患者。在用戶.php中public function patients(){    return $this->hasMany(Patient::class);}在Patient.php中public function user(){    return $this->belongsTo(User::class);}我的 DatabaseSeeder.php$users = factory(User::class, 10)->create();$users->each(function ($user) {    $user        ->patients()        ->saveMany(factory(Patient::class, 10)            ->create());});當我嘗試建立關(guān)系時，我收到了錯誤general error: 1364 Field 'user_id' doesn't have a default value該關(guān)系不應(yīng)該填充外鍵嗎？// 編輯更多信息患者遷移        if (Schema::hasTable($this->setSchemaTable)) return;        Schema::create($this->setSchemaTable, function (Blueprint $table) {            $table->increments('id');            $table->unsignedInteger('user_id');            $table->string('firstname', 191);            $table->string('lastname', 191);            $table->date('birth_date');            $table->nullableTimestamps();            $table->softDeletes();                        $table->foreign('user_id')->references('id')->on('users');        });病人工廠$factory->define(Patient::class, function (Faker $faker) {    return [        'firstname'      => $faker->firstname,        'lastname'       => $faker->lastname,        'birth_date'     => $faker->date,    ];});用戶遷移        if (Schema::hasTable($this->setSchemaTable)) return;        Schema::create($this->setSchemaTable, function (Blueprint $table) {            $table->increments('id');            $table->string('firstname', 191);            $table->string('lastname', 191);            $table->string('email', 191)->unique();            $table->string('password', 191);            $table->rememberToken();            $table->string('lang')->default('en');            $table->tinyInteger('change_password')->default('1');            $table->softDeletes();            $table->nullableTimestamps();        });