How to do sorting in nodejs in backend - node.js

Question

This is my node Api
router.post("/*****", async function(req, res, err) {
let limit = 5;
let offset = 0;
tblAdmin
.findAndCountAll()
.then(data => {
console.log("hello world", req.body);
let page = (req.body.page && req.body.page) || 1;
let sortfield = req.body.sortfield;
let sortOrder = req.body.sortOrder;
let pages = Math.ceil(data.count / limit);
offset = limit * (page - 1);
tblAdmin
.findAll({
attributes: ["id", "firstName", "lastName", "status", "email"],
limit: limit,
offset: offset
// order: [`firstName`, `DESC`]
// $sort: { id: 1 }
})
.then(users => {
res.status(200).json({
status: 1,
message: "Data has been retrieved",
result: users,
count: data.count,
pages: pages
});
});
// res.status(200).json({
// status: 1,
// message: "Data has been retrieved",
// data: data.map(result => {
// return {
// id: result.id,
// firstName: result.firstName,
// lastName: result.lastName,
// status: result.status,
// email: result.email
// };
// })
// });
})
.catch(err => {
res.status(500).json({
status: 0,
message: "Data is not retrieved from database"
});
});
});
and this is my react front end
axios.post(`http://abc/**`, params).then(res => {
const pagination = { ...this.state.pagination };
let apiData = res.data.result;
console.log("Data", apiData);
console.log("params", params);
if (res.data.status === 1) {
const objects = apiData.map(row => ({
key: row.id,
id: row.id,
firstName: row.firstName,
lastName: row.lastName,
status: row.status,
email: row.email
}));
console.log(res.data);
pagination.total = res.data.count;
this.setState({
loading: false,
data: objects,
pagination
});
} else {
console.log("Database status is not 1!");
}
});
now this is shown on a table and when i select the field of table in front end it should show ascending or descending order i need to do that order in backend.
from front end i m sending param which includes pagination, sortfield and sortorder and i m getting that in backend now what should i do to change the table according to my order?

Answer 1

The document can be found here
router.post("/*****", async function(req, res, err) {
let limit = 5;
let offset = 0;
tblAdmin
.findAndCountAll()
.then(data => {
console.log("hello world", req.body);
let page = (req.body.page && req.body.page) || 1;
let sortfield = req.body.sortfield;
let sortOrder = req.body.sortOrder;
let pages = Math.ceil(data.count / limit);
offset = limit * (page - 1);
tblAdmin
.findAll({
attributes: ["id", "firstName", "lastName", "status", "email"],
limit: limit,
offset: offset
order: [[sortfield || 'id', sortOrder || 'DESC']] // fixed at here
})
.then(users => {
res.status(200).json({
status: 1,
message: "Data has been retrieved",
result: users,
count: data.count,
pages: pages
});
});
})
.catch(err => {
res.status(500).json({
status: 0,
message: "Data is not retrieved from database"
});
});
});
Edit 1: Add sort default if sortfield or sortOrder is undefined