当前使用版本 v1.6.3

belongsTo 关系使用问题

• 外键名必须填写，否则不能正确的保存。

• 外键需要允许为空（nullable）否则会报错(已经提交issue截止目前未修复)

  // tables 
        Schema::create('users', function (Blueprint $table) {
            $table->uuid('id');
            $table->string('email', 64)->unique();
            $table->boolean('revoked')->default(0);
            $table->dateTime('email_verified_at')->nullable();
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });
  
  
        Schema::create('profiles', function (Blueprint $table) {
            $table->increments('id');
            $table->uuid('user_id')->nullable()->index();  // 目前需要为 nullable, 这个bug目前为止还没有修复
            $table->string('name');
            $table->string('description')->nullable();
            $table->timestamps();
        });
  class Teacher extends Model
  {
    protected $guarded=[];
    //
    public function user() {
        return $this->belongsTo(User::class, 'user_id', 'id');  // 这里必须填写，虽然Laravel 虽然在Laravel 中默认就是这些值，但是Laravel-Admin 没办法获取到默认的字段名
    }
  }
  // Model
  
  class User extends Authenticatable
  {
    use Notifiable;
  
    public $incrementing=false;
    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];
  
    public function profile() {
        return $this->hasOne(Profile::class);
    }
  }
  
  // Form
  
        $form = new Form(new Profile);
  
        $form->text('name', '姓名')->rules('required');
        $form->password('user.email', '密码')->rules('required');
        $form->password('user.password', '密码')->rules('required');
        $form->textarea('description', '描述');
  
  //
  

  haseMany 关系

• 主键必须为自动生成，否则不能正确的保存从表
  tables

  CREATE TABLE `main` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  
  CREATE TABLE `sub` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT, // 非自动生成主键不能正确的保存
  `key` int(10) varchar(100) NOT NULL,
  `main_id` int(10) unsigned NOT NULL,
  `value` varchar(255) NOT NULL,
  PRIMARY KEY (`id`),
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  

  Models

  class Main extends Model
  {
    public $timestamps = false;
    public function subs()
    {
        return $this->hasMany(Sub::class, 'main_id');  // main_id 必须填写，虽然 Laravel 单独使用的时候可以不用写
    }
  }
  
  class Sub extends Model
  {
    public $timestamps = false;
    // public $incrementing = false; // 如果没有自动生成的主键而是 key 做为主键的话，会导表单中Sub保存失败，key 为空
    // public $primaryKey = 'key';
    protected $fillable = ['key', 'value'];
  
    public function main()
    {
        return $this->belongsTo(Main::class, 'main_id'); //同上
    }
  }
  

  Form

  
        $form = new Form(new Main);
        $form->text('name', '名称');
        $form->hasMany('subs','从表', function (Form\NestedForm $form) {
            $form->text('key');
            $form->text('value');
        });
        return $form;
  

  结论

Laravel-admin 完全不适合使用于生产环境，复杂的关系还没有完善