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Lesson 7 - Reading Data From MongoDB, RESTful API with a database

In the previous lesson, First steps in MongoDB, we showed how to create MongoDB schemas and compile them into models. We also learned how to create new documents in a collection and how to return all documents from the collection. Today we're going to continue, learn advanced search for collection items and start refactoring our RESTful API in Node.js from past lessons to make it work with the database.

Selecting a Document by ID

MongoDB prepares an _id item for each entry automatically. We can consider this item as the unique identifier of the record , ie. it'll always occur in the collection only once. Another advantage is that this item serves as an index (similar to the primary key in relational databases) and we can search by it very fast. Therefore it's a good idea to use it as much as possible, it's useful almost every time we work with a single record.

There are the following methods on the


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This tutorial shows what MongoDB offers when reading data and how to use it. The first part of the RESTful API with MongoDB is also implemented in Node.js.

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Article has been written for you by Radek Veverka
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