php – Laravel中的模型关系5.3

概述我有网站购物车的 MySQL表： Cart:id | user Cart_goods:cart_id | good_id | good_typeDetails:id | nameAppliances:id | name 班车,其中包含商品： class Cart extends Model{ protected $table = 'cart'; protected $f 我有网站购物车的 MySQL表：

Cart:ID | user Cart_goods:cart_ID | good_ID | good_typeDetails:ID | nameAppliances:ID | name

班车,其中包含商品：

class Cart extends Model{ protected $table = 'cart'; protected $fillable = ['user','sum','profit','discount']; protected $guarded = ['user']; public function goods() {    return $this->hasMany('App\Models\Good'); }}

Class Good,可以是Detail或Appliance,相对于cart的cart_ID：

class Good extends Model{ protected $table = 'cart_goods'; protected $types = [    'Detail' => 'App\Models\Detail','Appliance' => 'App\Models\Appliance' ]; public $primaryKey = 'cart_ID'; public function good() {    return $this->morphTo(); }}

详细类：

class Detail extends Model { use SoftDeletes; protected $morphClass = 'Detail'; protected $table = 'details'; protected $fillable = ['article','name','photo','price_procurement','price_retail','serial','location_ID','type_ID','appliance_ID','comment','for']; protected $dates = ['deleted_at']; protected $guarded = []; public function goods() {    return $this->morphMany('App\Models\Good','good'); }}

我需要把所有的电器和细节放在购物车里.如何使用ORM？

使用 nested eager loading.假设关系方法名称是cartGoods,详细信息和设备,详细信息是购物车的详细信息,并且您已经定义了关系权限：

Card::where('ID',$ID)    ->with('cartGoods.appliances','details')    ->first();

总结

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