Laravel 5.4如何用关系响应JSON？

Question

我想用Laravel响应JSON，我有CategoryModel属于SongModel。

这是我CategoryModel

class CategoryModel extends Model 
{ 
    protected $table = 'categories'; 
    protected $fillable = [ 
     'id', 
     'name', 
    ]; 

    public function song() 
    { 
     return $this->hasMany(SongModel::class); 
    } 
} 

这是我SongModel

class SongModel extends Model 
{ 
    protected $table = 'songs'; 
    protected $fillable = [ 
     'id', 
     'name', 
     'url', 
     'categories_id', 
     'singers_id', 
     'types_id', 
    ]; 

    public function category() 
    { 
     return $this->belongsTo(CategoryModel::class); 
    } 
} 

我要回应JSON与关系。我写道：

class SongController extends Controller 
{ 
    public function index(SongModel $songModel) 
    { 
     $song = $songModel->category()->get(); 
     return response()->json(["DATA" => $song], 201); 
    } 
} 

Answer 1

试试这个。 return response()->json(["DATA" => $songModel->load('category')->toArray()], 201);

Answer 2

要做到这一点，你只需要加载的关系返回响应之前：

public function index(SongModel $songModel) 
{ 
    $songModel->load('category'); 

    return response()->json(["DATA" => $songModel], 201); 
} 

https://laravel.com/docs/5.4/eloquent-relationships#lazy-eager-loading

希望这有助于！

Answer 3

OR，您可以使用with('song')

lass SongController extends Controller 
{ 
    public function index(SongModel $songModel) 
    { 
     $song = $songModel::with('song')->get(); 
     return response()->json(["DATA" => $song], 201); 
    } 
}