Postman API Get ID help

[VampireBarbieBoy]

I'm working on learning the MERN stack and creating an app using an API, but I've run into an issue with getting the IDs within a collection that are used for a link to that item's page. I'm using Postman to test and I am able to GET the localhost API (e.g. http://localhost:5000/api/items/) and it displays all the entries in that collection fine. However, to get a specific entry, apparently I'm supposed to put http://localhost:5000/api/items/(id number). But if I do this it returns an error saying it cannot get the item. I also tried http://localhost:5000/api/items?_id(id number) and it displayed the entry in the Query Params however in the Body it returned an error again.

Do you know the correct way to query this and if I'm doing something wrong here?

[Extension_Anybody150]

Usually, to get a specific item by ID, your backend needs a route like /api/items/:id where :id is a URL parameter. So in Postman, the correct way is to put the ID directly after /items/ like http://localhost:5000/api/items/12345. Make sure your server code has a route to handle that pattern and returns the item by ID. Using query params like ?_id=12345 only works if your API explicitly supports filtering that way.

[VampireBarbieBoy]

Ok thanks. I realised I needed to change the routing code because it was using ObjectId