Adding multiple entries/rows with knex mysql - mysql

Question

I get the following data from the req.body:
{
"user_id": "1",
"user_name": "jkalandarov",
"email": "jkalandarov#gmail.com",
"courses": [
{
"course_id": 1,
"course_name": "English",
"course_price": 265
},
{
"course_id": 2,
"course_name": "Node.js",
"course_price": 200
},
{
"course_id": 3,
"course_name": "Backend Developement",
"course_price": 300
}
]
}
I want to insert this data into three rows with the help of knex into mysql database table like this with a single query:
Any ideas?
Thanks in advance!

Answer 1

Assuming you already have your knex connection set up, it should simply allow you to pass an array of objects into the insert function to insert multiple rows with a single statement. https://knexjs.org/#Builder-insert
Step 1: Build an array of objects
const objectsToInsert = req.body.courses.map(course => {
return {
user_id: req.body.user_id,
user_name: req.body.user_name,
email: req.body.email,
...course
}
});
Step 2: Insert them using your knex connection
await knex('your_table_name').insert(objectsToInsert);
This should insert those three rows into your table in a single query.
As this data is coming directly from the request body it is obviously also a good idea to add some validation here but that feels out of scope for your original question.