How to remove an element from an array included in an Object - node.js

Question

I'm trying to build an application, using MongoDB and nodejs.
I have a model Ride, which contains an array of userID called steps. I'd like to delete one userID entry from a Ride specified by its own RideID.
I have tried the following code, but it's not working, an error is always raised
router.post('/quitRide',async (req,res)=>{
let userID = req.body.userID; //userID to be deleted
let rideID = req.body.rideID; //rideID of the Ride we want to access
Ride.find({_id:rideID})
.exec()
.then(t => {
t[0].steps.splice(t[0].steps.indexOf(userID), 1);
res.status(200);
})
.catch(err => res.status(400).json({error : err}))
})
Here's the error I get :
{error: "erreurTypeError: Cannot read property 'indexOf' of undefined"}
It seems like steps are somehow not accessible

Answer 1

Try using $pull, for more go to this link
router.post('/quitRide',async (req,res)=>{
let userID = req.body.userID; // userID to be deleted
let rideID = req.body.rideID; // rideID of the Ride we want to access
Ride.findOneAndUpdate({_id:rideID}, { $pull: { steps: userId } })
.exec()
.then(t => {
// response with success
res.status(200);
})
.catch(err => res.status(400).json({error : err}))
})

Answer 2

You can use the Lodash Remove function to remove the elements from the array.
you can install the npm package by running this command npm i --save lodash.remove and then do the changes in your code.
router.post('/quitRide',async (req,res)=>{
let userID = req.body.userID; //userID to be deleted
let rideID = req.body.rideID; //rideID of the Ride we want to access
Ride.find({_id:rideID})
.exec()
.then(t => {
_.remove(t[0].steps,userID);
console.log(t[0].steps)//which contains your array without userID
res.status(200);
})
.catch(err => res.status(400).json({error : err}))
})
Don't forget to import/require the lodash package and you can find the documentation on below link
https://lodash.com/docs/4.17.14#remove