Mongoose updateMany by id using Node - node.js

Question

is it possible to update array of object by id? ex.:
This is my array:
[
{
"_id": "5fdb614d686e671eb834a409",
"order": 1,
"title": "first"
},
{
"_id": "5fdb61c0686e671eb834a41e",
"order": 2,
"title": "second"
},
{
"_id": "5fdb61d6686e671eb834a424",
"order": 3,
"title": "last"
}
]
and I would like to change only the order of each by ID. I am using Node and I tried to do like that:
router.post("/edit-order", auth, async (req, res) => {
try {
const sections = await Section.updateMany(
req.body.map((item) => {
return { _id: item._id }, { $set: { order: item.order } };
})
);
res.json(sections);
} catch (e) {
res.status(500).json({ message: "Something went wrong in /edit-order" });
}
});
my request body is:
[
{
"_id": "5fdb614d686e671eb834a409",
"order": 2
},
{
"_id": "5fdb61c0686e671eb834a41e",
"order": 3
},
{
"_id": "5fdb61d6686e671eb834a424",
"order": 4
}
]
but as a result, I got:
[
{
"_id": "5fdb614d686e671eb834a409",
"order": 4,
"title": "first"
},
{
"_id": "5fdb61c0686e671eb834a41e",
"order": 4,
"title": "second"
},
{
"_id": "5fdb61d6686e671eb834a424",
"order": 4,
"title": "last"
}
]
so, it change every order by the last value of request array. Any ideas how could I manage that. If you know any other solution feel free to share, all what I need is to change order only by id.

Answer 1

Well, since you have a different value of order for each item, you'll need to do a bulkWrite.
router.post('/edit-order', auth, async (req, res) => {
try {
const writeOperations = req.body.map((item) => {
return {
updateOne: {
filter: { _id: item._id },
update: { order: item.order }
}
};
});
await Section.bulkWrite(writeOperations);
res.json(req.body);
} catch (e) {
res.status(500).json({ message: 'Something went wrong in /edit-order' });
}
});
If you had a single value of order to all the items, you could've used updateMany along with $in.
router.post('/edit-order', auth, async (req, res) => {
try {
const sectionsIds = req.body.map((item) => {
return item._id;
});
const sections = await Section.updateMany(
{ _id: { $in: sectionsIds } },
{ order: 'A single value for all sections in body' }
);
res.json(sections);
} catch (e) {
res.status(500).json({ message: 'Something went wrong in /edit-order' });
}
});