Question

我有3个Mysql表，一个带供应商列表的供应商表，一个带这些供应商在其中存储的类别列表的categorys表，category表通过辅助键链接到该供应商表（vendor_id ），我还有一个产品表，其中包含这些类别中的所有产品，并且使用外键（category_id）将其链接到类别表。我如何编写一个NodeJs / Express路由，该路由返回一个如下所示的json对象，

    {
    "id": 1,
    "vendor": "Food place",
    "category": "Chicken"[
                     {
                        "id": "1,            
                        "name": "Fried chicken",
                        "price": "100"
                     },
                     {
                        "id": "2,            
                        "name": "Soup Chicken",
                        "price": "150"
                     }
}

因此json对象将向供应商返回他们在那里存储的所有类别，并在类别内返回所有属于这些类别的产品

表看起来与此类似供应商表：

+----------+--------------+------+-----+---------+----------------+
| Field    | Type         | Null | Key | Default | Extra          |
+----------+--------------+------+-----+---------+----------------+
| id       | int(11)      | NO   | PRI | NULL    | auto_increment |
| name     | varchar(255) | NO   |     | NULL    |                |
| category | varchar(255) | NO   |     | NULL    |                |
+----------+--------------+------+-----+---------+----------------+

类别表：

+-----------+-------------+------+-----+---------+----------------+
| Field     | Type        | Null | Key | Default | Extra          |
+-----------+-------------+------+-----+---------+----------------+
| id        | int(11)     | NO   | PRI | NULL    | auto_increment |
| name      | varchar(20) | YES  |     | NULL    |                |
| vendor_id | int(11)     | NO   | MUL | NULL    |                |
+-----------+-------------+------+-----+---------+----------------+

产品表：

+-----------------+---------------+------+-----+---------+----------------+
| Field           | Type          | Null | Key | Default | Extra          |
+-----------------+---------------+------+-----+---------+----------------+
| id              | int(11)       | NO   | PRI | NULL    | auto_increment |
| price           | decimal(10,0) | NO   |     | NULL    |                |
| name            | varchar(255)  | YES  |     | NULL    |                |
| category_id     | int(11)       | YES  | MUL | NULL    |                |
+-----------------+---------------+------+-----+---------+----------------+

Answer 1

路线

export const route = (router: any) => {
    return router.get('/your_route_here', (req: any, res: any) => {
        // do your logic here
    });
}

export default route;

来自NodeJs和MySql的嵌套Json响应

1 个答案: