Laravel 모델 간의 가장 간단한 '일대일' 관계에 대해 이야기해 보겠습니다!

php artisan make:model Profile --migration

namespace App;use Illuminate\Database\Eloquent\Model;class Profile extends Model {}

public function up(){
    Schema::create('profiles', function(Blueprint $table)
    {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->foreign('user_id')->references('id')->on('users');
        $table->string('url');
        $table->string('telephone');
        $table->timestamps();
    });}

php artisan migrate

Migrated: 2020_10_11_015236_create_profiles_table.php

class User extends Model {
    public function profile()
    {
        return $this->hasOne('App\Profile');
    }}

$user = User::find(1)->profile->telephone;

$user = User::find($id);
$user->profile; // 返回 Profile 对象
$user->profile(); // 返回 hasOne 关联关系对象

$profile = new Profile;
$profile->telephone = '12345678';
$user = User::find(1);
$user->profile()->save($profile);

$user = User::find($id);
$user->profile()->delete();

$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');