如何一次在node.js的函数内部编写两个操作？

Question

I have two tables in my database, i want to get both datas with one function using nodejs

My table name is ContactGroup and Group

My code:

exports.getNewGroup = function (req, res) {
    ContactGroup.findAndCountAll({
        attributes: ['id', [sequelize.fn('COUNT', sequelize.col('group.id')),
            'contactCount'
        ]],
        include: [{
            model: Group,
        }],
    }).then(seenData => {
        console.log('seenData:', seenData);
    });


    Group.findAll().then(function (data) {
        return res.status(200).send(data);
    }).catch(function (err) {
        return res.status(400).send(err.message);
    });
};

Like above code, i am writing ContactGroup.findandcount and Group.findall, i checked this api via postman, but only one working here, I want both of them working? help me!

Answer 1

you take a global array or object and use it in follwing manner

exports.getNewGroup = function (req, res) {
    var globalObj={};
        ContactGroup.findAndCountAll({
            attributes: ['id', [sequelize.fn('COUNT', sequelize.col('group.id')),
                'contactCount'
            ]],
            include: [{
                model: Group,
            }],
        }).then(seenData => { globalObj.seendata=seenData;return Group.findAll();})


        .then(function (data) {
    globalObj.alldata=data;
            return res.status(200).send(globalObj);
        }).catch(function (err) {
            return res.status(400).send(err.message);
        });
    };

Answer 2

Change your code to this and try :

exports.getNewGroup = function (req, res) {
ContactGroup.findAndCountAll({
    attributes: ['id', [sequelize.fn('COUNT', sequelize.col('group.id')),
        'contactCount'
    ]],
    include: [{
        model: Group,
    }],
}).then(seenData => {
    console.log('seenData:', seenData);
    Group.findAll().then(function (data) {
       return res.status(200).send(data);
    }).catch(function (err) {
       return res.status(400).send(err.message);
    });
 });    
};

Answer 3

although others answers are correct but as i saw there are two independent async function so it's better to populate them parallel (more performance gain) as below.

exports.getNewGroup = function (req, res) {
    p1= ContactGroup.findAndCountAll({
        attributes: ['id', [sequelize.fn('COUNT', sequelize.col('group.id')),
            'contactCount'
        ]],
        include: [{
            model: Group,
        }],
    })
    p2 =Group.findAll() 

    Promise.all([p1,p2]).then(values => { 
        console.log(values);
    })
    .catch(function (err) {
       return res.status(400).send(err.message);
    });


};