exports.addToCart = async(req,res)=>{
const cart = await schema.cart.findOne({username:req.body.username})
if(cart){
return res.status(404).json({
message:"User's cart is already available, append to the same cart"
})
}
else{
const cart = new schema.cart({
cartId : getValueForNextSequence("item_id"),
username : req.body.username,
productsInCart :req.body.productsInCart
});
console.log(cart.cartId);
await cart.save();
res.status(200).json(cart)
}
}
async function getValueForNextSequence(sequenceOfName){
const sequenceDoc = await schema.counter.findOneAndUpdate(
{"_id": sequenceOfName },
{"$inc":{"sequence_value":1}},
);
return sequenceDoc.sequence_value;
}
THis is the schema for counter I added a document with _id as item_id and sequence_value as 0
const counterSch = new mongoose.Schema({
_id :{
type : String
},
sequence_value:{
type : Number
}
})
getValueForNextSequence method is not returning any value I dont know why please help with this issue.Here I have to increment the cartId automatically but its not happening
