Mongoose / Node : How to add an object to an array? - node.js

Question

I have a problem when I try to update an array with Mongoose/Node.
I want to add my new price for example, req.body value is : { price: 12 } or req.body is : { description: 'my description' } but when I do this the total array is replace by just my new object ! :/
Here is my model:
const restaurantSchema = mongoose.Schema({
userId: { type: Object, required: true },
name: { type: String },
menus: [{
name: { type: String },
price: { type: String },
description: { type: String },
}],
})
And my node Js code :
const menuUpdate = req.body;
const menuId = req.params.menuId;
const userId = userIdFromToken(req);
const filter = {
userId: userId,
"menus._id": menuId
};
const update = { $set: { "menus.$": menuUpdate } };
const options = {
upsert: true,
new: true
};
Restaurant.findOneAndUpdate(filter, update, options).then(() => {
return res.status(204).json({ message: "Menus updated " });
});
Thanks for your help,
David
====
I change my code with the help of #aks, like this...
const menuUpdate = req.body;
for (const [key, value] of Object.entries(menuUpdate)) {
this.menuKey = `${key}`;
this.menuValue = `${value}`;
}
if (this.menuKey === 'name') {
this.update = { $set: { "menus.$.name": this.menuValue } };
}
if (this.menuKey === 'price') {
this.update = { $set: { "menus.$.price": this.menuValue } };
}
if (this.menuKey === 'description') {
this.update = { $set: { "menus.$.description": this.menuValue } };
}
const menuId = req.params.menuId;
const userId = userIdFromToken(req);
const filter = {
userId: userId,
'menus._id': menuId,
};
const options = {
upsert: true,
new: true
};
Restaurant
.findOneAndUpdate(
filter,
this.update,
options,
)
.then ( () => {
return res.status(204).json({ message: 'Menus updated ' });
});
Is there a way to simplify that without if ?

Answer 1

Your Node code
menus: [{
name: "toto",
price: 25,
description: "custom sweet",
}]
Now You have to update only the price from 25 to 45 for that you have to send the whole array.
So you have to simple set the array with this value
And if you go to other approach
then on req.body add one more parameter i.e menuIndex: 2
And on you update request make the condition if menuIndex is 2 then update specific column
const menuUpdate = req.body;
const menuId = req.params.menuId;
const userId = userIdFromToken(req);
const filter = {
userId: userId,
"menus._id": menuId
};
let update = {};
if (req.body.menuIndex === 1) {
update = { $set: { "menus.$.name": req,body.val} };
}
if (req.body.menuIndex === 2) {
update = { $set: { "menus.$.price": req,body.val
} };
}
if (req.body.menuIndex === 3) {
update = { $set: { "menus.$.description": req,body.val} };
}
const options = {
upsert: true,
new: true
};
Restaurant.findOneAndUpdate(filter, update, options).then(() => {
return res.status(204).json({ message: "Menus updated " });
});