I am using the following code to get the details of a user when I pass their id as a parameter:
server.get("/users/:id", (req, res) => {
const itemId = req.params.id;
dbCollection.findOne({ _id: itemId }, (error, result) => {
if (error) throw error;
// return item
res.json(result);
});
});
However, this doesn't seem to work, as whenever I run the code, I get returned with a null value. My question is not the same as many previously asked questions because I have ObjectId('randomId')
as my id, and not a string. How can I fix my code?
req.params.id
comes as a string while your _id
is an ObjectId so this won't work since MongoDB requires type equality first, you need to cast the value:
const itemId = mongoose.Types.ObjectId(req.params.id);
MongoDB wouldn't consider the "itemId" as a MongoDB id, therefore you need to transform it as shown below:
new mongodb.ObjectId(itemId)
This implies that:
const mongodb = require('mongodb')
As others already said, MongoDB expects _id
to be an ObjectID. But if you are searching for ONE item, instead of using findOne
use findById
, which accepts id as a string.
const { Model } = require('./models'); // Model is your Mongoose Schema
server.get("/users/:id", async (req, res) => {
const { id } = req.params;
// This is the same as Model.findOne({ _id: new ObjectId(id) });
const item = await Model.findById(id);
return res.json(item);
});
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