[英]best way to query my database using laravel
我开始使用 Laravel 做一个小项目,所以我的数据库中有三个表
我想在 HTML 表格中列出我的所有产品,现在我在我的控制器中使用这个方法leftJoin是正确的方法,或者我必须用 eloquent 如果是的话如何给我一个例子
public function index()
{
$query = DB::table('products')
->leftJoin('categories','categories.id', '=', 'products.product_category')
->leftJoin('brands','brands.id', '=', 'products.product_brand')
->leftJoin('suppliers','suppliers.id', '=', 'products.product_supplier')
->orderBy('products.id', 'desc')->paginate(15);
return response()->json($query);
}
这是我的结果:
"data": [
{
"id": null,
"product_name": "Dylan Hernandez",
"product_sell_as": "Delectus pariatur",
"product_upc": 12541,
"product_sku": "12541",
"product_description": "Et enim quisquam ani",
"product_category": 2,
"product_supplier": 2,
"product_buying_price": "390.00",
"product_selling_price": "226.00",
"product_min_stock": "10.00",
"product_max_stock": "10.00",
"product_alert_stock": 10,
"product_alert_phone": "+1 (955) 289-5975",
"product_alert_email": "mexi@mailinator.net",
"product_cost_price": "145.00",
"product_supplier_discount": "10.00",
"product_uom": 2,
"product_brand": 2,
"product_warehouse": 2,
"product_availability": 2,
"product_image": "public/product/tDlkQkCZA4aWDnFkWIed8TKQEP0Wgu0zYGtYfD5T.jpeg",
"deleted_at": null,
"created_at": null,
"updated_at": null,
"category_name": "Shoes",
"brand_name": "Dolce Gabana",
"supplier_company": null,
"supplier_code": null,
"supplier_tax_number": null,
"supplier_phone": null,
"supplier_fax": null,
"supplier_website": null,
"supplier_email": null,
"supplier_note": null,
"supplier_type": null,
"supplier_address": null,
"supplier_city": null,
"supplier_state": null,
"supplier_zip": null,
"supplier_country": null,
"supplier_representative": null,
"supplier_price_list": null,
"supplier_tax_type": null,
"supplier_currency": null
}
]
尝试使用 Eloquent一对多会很优雅:
在您的类别模型中
public function products()
{
return $this->hasMany(\App\Product::class, 'product_category', 'id');
}
在您的品牌模型中:
public function products()
{
return $this->hasMany(\App\Brand::class, 'brand', 'id');
}
在您的供应商模型中:
public function products()
{
return $this->hasMany(\App\Supplier::class, 'product_supplier', 'id');
}
在您的产品型号中:
public function category()
{
return $this->belongsTo(\App\Category::class, 'product_category');
}
public function brand()
{
return $this->belongsTo(\App\Brand::class, 'brand');
}
public function supplier()
{
return $this->belongsTo(\App\Supplier::class, 'product_supplier');
}
所以你可以像这样查询:
Product::with(['category', 'brand', 'supplier'])->orderBy('id', 'desc')->paginate(15);
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