Question

我正在使用nodejs的sequelize作为RESTful API。我有2个型号，安全和订单。订单模型通过符号使用外键引用安全模型。

安全模式：

classMethods: {
      associate: function(models) {
        // associations
        security.hasMany(models.order, { foreignKey: 'security_symbol' });
      }
    }

订单型号：

classMethods: {
      // associations
      associate: function(models) {
        order.belongsTo(models.security, { foreignKey: 'security_symbol' })
      }
    }

然后我执行一个查询以返回所有正常工作的订单，不过我希望安全模型的其他一些属性包含在一种“平坦的”中。 JSON。的查询：

Order.findAndCountAll({
        where: { user_id: user.id},
        attributes: [
            'id', 'side', 'quantity', 'price', 'status', 'created_at'
        ],
        order: [
            ['id', 'DESC']
        ],
        include: [{ model: models.security, attributes: ['name', 'symbol'] }]

    })

响应：

"orders": [
    {
      "id": 25,
      "side": 1,
      "quantity": 1150,
      "price": "13.33",
      "status": 0,
      "created_at": "2017-04-27T09:51:41.479Z",
      "security": {
        "name": "Car & General (K) Ltd",
        "symbol": "C&G"
      }
    },
    {
      "id": 24,
      "side": 1,
      "quantity": 1000,
      "price": "5.63",
      "status": 4,
      "created_at": "2017-04-27T09:50:31.939Z",
      "security": {
        "name": "Eveready East Africa Ltd",
        "symbol": "EVRD"
      }
    }...

期望回复：

"orders": [
    {
      "id": 25,
      "side": 1,
      "quantity": 1150,
      "price": "13.33",
      "status": 0,
      "created_at": "2017-04-27T09:51:41.479Z",
      "security_name": "Car & General (K) Ltd",
      "security_symbol": "C&G"
    },
    {
      "id": 24,
      "side": 1,
      "quantity": 1000,
      "price": "5.63",
      "status": 4,
      "security_name": "Eveready East Africa Ltd",
      "security_symbol": "EVRD"
      "created_at": "2017-04-27T09:50:31.939Z",

    }...

差异是父母的＆＃39;没有嵌套在订单中。

Answer 1

您可以使用下面的raw属性

Order.findAndCountAll({
        where: { user_id: user.id},
        attributes: [
            'id', 'side', 'quantity', 'price', 'status', 'created_at'
        ],
        order: [
            ['id', 'DESC']
        ],
        include: [{ model: models.security, attributes: ['name', 'symbol'] }]
        raw: true
    })

但是sequelize会给你带来像

的结果

"orders": [
    {
      "id": 25,
      "side": 1,
      "quantity": 1150,
      "price": "13.33",
      "status": 0,
      "created_at": "2017-04-27T09:51:41.479Z",
      "security.name": "Car & General (K) Ltd",
      "security.symbol": "C&G"
    },
    {
      "id": 24,
      "side": 1,
      "quantity": 1000,
      "price": "5.63",
      "status": 4,
      "security.name": "Eveready East Africa Ltd",
      "security.symbol": "EVRD"   
    }...

我不确定security.name＆amp; security.symbol是否可取。但这就是续集会表现的方式。希望这有帮助

Answer 2

尝试以下操作：

Order.findAndCountAll({
        where: { user_id: user.id},
        attributes: [
            'id', 'side', 'quantity', 'price', 'status', 'created_at',
            [sequelize.literal('"order->security".name'), 'security_name'],
            [sequelize.literal('"order->security".symbol'), 'security_symbol']
        ],
        order: [
            ['id', 'DESC']
        ],
        include: [{ model: models.security, attributes: []}]

    })

请注意，您可能需要将order->security更新为实际的数据库表名称（orders和securities）

Sequelize nodejs返回平面JSON

2 个答案: