How do I convert a SQL query for Sequelize? - sql

Question

I have a SQL query (using mysql as DB) that I now need to rewrite as a sequelize.js query in node.js.
SQL Query
SELECT p.UserID, SUM(p.score), u.username
FROM Picks p
LEFT JOIN Users u
ON p.UserId = u.id
GROUP BY p.UserId;
not quite sure how this query needs to be structured to get the same results with sequelize.

Answer 1

This should do what you're needing:
db.Pick.findAll({
attributes: [
'UserID',
[db.sequelize.fn('SUM', db.sequelize.col('score')), 'score']
],
include: [{
model: db.User,
required: true,
attributes: ['username']
}],
group: ['UserID']
}).then((results) => {
...
})

Answer 2

Maybe try this (I assume you already associate Picks and Users), and you can access user.name by pick.user.username:
Picks.findAll({
attributes: ['UserID', [sequelize.fn('SUM', 'score'), 'sumScore']]
groupBy: ['UserID']
include: [
model: Users
]
});

Answer 3

The website at this domain no longer provides this tool. It's now filled with ads and likely malware.
I know this question is old but this answer may help others.
I have found an online converter that can convert raw SQL to Sequelize.
The link is https://pontaku-tools.com/english/
When converted from this site I got the following reponse.
Picks.hasMany(Users,{foreignKey: '', as: 'u'});
var _q = Picks;
_q.findAll({
include: [{model: Users, as: 'u', required: false,}, ],
attributes: [[sequelize.fn('SUM', sequelize.col('p.score')), 'p.score'],['p.UserID', 'p.UserID'],['u.username', 'u.username']],
group: [''],
});

Answer 4

Writing a sql query may not always be very simple with sequelize functions. Sometimes I recommend to run your plain sql query by combining it with this function.
const { QueryTypes } = require('sequelize');
async message_page (req,res) {
const messagePage = await db.query("SELECT * FROM ..", { type: QueryTypes.SELECT });
return messagePage;},