Question

我想知道使用#!/usr/bin/python X_Variable_1, X_Variable_2, X_Variable_3, *_ = [line.rstrip() for line in open("FILENAME").readlines()]

对MySQL执行并行查询是否有效例如，我需要获得多个股票代码及其最后价格，这些代码保存在MySQL的不同表格中。

所以使用Sequelize我不能在Promise.all中添加hasOne，因为它会给我多个相同符号的结果。

所以我的代码看起来像这样

finaAll

但是我的所有价格都来自我的数据库

Symbol.findAll({
    where: {
        symbol: ["AAPL", "ORCL", "MSFT", "CSCO"]
    },
    include: [{
        as: "price", // this is hasOne association
        model: Price // this is separate model for prices
    }],
    order: [ // here I am ordering prices by createdAt DESC to get latest price
        [{ as: "price", model: Price }, "createdAt", "DESC"]
    ]
});

所以我认为唯一的解决方案是使用[{ "symbol": "AAPL", "price": { "id": 41669338, "open": 143.729996, "high": 144.179993, "low": 143.270004, "close": 143.339996, "volume": 16621300, "adjClose": 143.339996, "createdAt": "2017-04-07T00:00:00.000Z", "companyId": 13, "updatedAt": "2017-04-07T00:00:00.000Z" } }, { "symbol": "AAPL", "price": { "id": 41663996, "open": 144.289993, "high": 144.520004, "low": 143.449997, "close": 143.660004, "volume": 21118000, "adjClose": 143.660004, "createdAt": "2017-04-06T00:00:00.000Z", "companyId": 13, "updatedAt": "2017-04-06T00:00:00.000Z" } }, { "symbol": "AAPL", "price": { "id": 41656633, "open": 144.220001, "high": 145.460007, "low": 143.809998, "close": 144.020004, "volume": 27481500, "adjClose": 144.020004, "createdAt": "2017-04-05T00:00:00.000Z", "companyId": 13, "updatedAt": "2017-04-05T00:00:00.000Z" } }, ... // omitted和include findOne，如下所示

Promise.all

这给了我正确的结果，但我想知道这是我的案例的好方法，还是有更好的方法呢？

提前致谢！

使用Sequelize的NodeJS MySQL并发查询

0 个答案: