Question

Laravel查询生成器

     $data = CustomerPrepaid
            ::join('pos_sales', 'customer_prepaid.customer_id', '=', 'pos_sales.customer_id')
            ->join('pos_sales_product', 'pos_sales.pos_sales_code', '=', 'pos_sales_product.pos_sales_code')
            ->where('pos_sales_product.product_id', 'customer_prepaid.product_id')
            ->select('customer_prepaid.customer_id', 'customer_prepaid.created_at',
            'pos_sales_product.pos_sales_product_code as reference_no', 

'customer_prepaid.product_id', 'customer_prepaid.balance', 
        'last_used', 'expiry_date', 'customer_prepaid.amount as price')
        ->offset(($page-1)*$limit)->limit($limit)->get();

SQL

SELECT customer_prepaid.customer_id, customer_prepaid.created_at as purchase_date,
pos_sales_product.pos_sales_product_code as reference_no, customer_prepaid.product_id, 
customer_prepaid.balance, customer_prepaid.amount*customer_prepaid.balance as value, 
last_used, expiry_date, customer_prepaid.amount as price,
customer_prepaid.amount*customer_prepaid.balance as total
FROM customer_prepaid
JOIN pos_sales ON customer_prepaid.customer_id = pos_sales.customer_id
JOIN pos_sales_product ON pos_sales.pos_sales_code = pos_sales_product.pos_sales_code
WHERE pos_sales_product.product_id = customer_prepaid.product_id

在服务器上执行的结果SQL返回正确的结果，但我没有得到雄辩的结果，为什么会这样？

Answer 1

哦，天哪，让我永远意识到你误用了->where。

将您的->where更改为->whereColumn：

$data = CustomerPrepaid
        ::join('pos_sales', 'customer_prepaid.customer_id', '=', 'pos_sales.customer_id')
        ->join('pos_sales_product', 'pos_sales.pos_sales_code', '=', 'pos_sales_product.pos_sales_code')
        ->whereColumn('pos_sales_product.product_id', 'customer_prepaid.product_id')
        ->select(
            'customer_prepaid.customer_id',
            'customer_prepaid.created_at',
            'pos_sales_product.pos_sales_product_code as reference_no',
            'customer_prepaid.product_id', 'customer_prepaid.balance',
            'last_used', 'expiry_date', 'customer_prepaid.amount as price'
        )
        ->offset(($page-1)*$limit)
        ->limit($limit)
        ->get();

您必须使用whereColumn代替where进行列比较。否则，它期望设置第三个参数value。

查看有关如何使用whereColumn：https://laravel.com/docs/5.5/queries#where-clauses

的文档

Laravel Query Builder语句没有返回结果，但是sql语句没有

1 个答案: