Spring Boot + MongoTemplate — Best GET API Filtering With Multiple Properties

How to create a GET API that queries database filtering based on multiple properties

We all would have created REST APIs with Spring boot and MongoDB but have we created the most efficient ones? In this article I’ll explain how we can use mongotemplate to fetch documents from the database, filtering based on multiple criteria.

Mongotemplate Introduction

We all use MongoRepository to connect to the mongodb and use it’s inbuilt functionalities to query the database or write custom queries, but you can do a lot mot more than just those primitive functionalities.

The MongoTemplate class is the primary implementation of mongo-operations interface which specifies the basic set of MongoDB operations. We can also use MongoRepository interface to perform MongoDB operations. The implementation class of MongoRepository uses MongoTemplate bean at run time.

MongoTemplate can do sorting, aggregations, finding the desired document based on multiple criteria and many more things, which is more efficient and increases the overall performance since the calculation/filtering is happening at the database level rather than fetching all the documents and writing…