Which is better MongoTemplate or MongoRepository?

MongoTemplate is a bit more lower level where you need to write your own queries. With embedded documents and denormalization it can be easier to write complex queries with MongoTemplate. For simple things I would use MongoRepository. I’ve seen some examples where both are used together in a hybrid approach.

How does MongoRepository work?

MongoRepository extends the PagingAndSortingRepository and QueryByExampleExecutor interfaces that further extend the CrudRepository interface. MongoRepository provides all the necessary methods which help to create a CRUD application and it also supports the custom derived query methods.

How do you test for MongoRepository?

How to unit test a Spring Boot MongoRepository?

1. start an embedded/in memory instance of MongoDB.
2. insert testdata from JSON or XML.
3. use an autowired repository to perform queries on the testdata.

What is MongoTemplate used for?

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.

What is the difference between MongoOperations and MongoTemplate?

MongoTemplate provides a simple way for you to save, update, and delete your domain objects and map those objects to documents stored in MongoDB. You can save, update and delete the object as shown below. MongoOperations is the interface that MongoTemplate implements.

How do I update MongoRepository?

The MongoRepository provides save() and saveAll() methods to update the entities. If entities are already available in collection in Mongo database, then they will be updated otherwise they will be inserted as new entities. The save() method updates one entity at a time and returns the updated entity.

How do I update a document in MongoRepository?

Why MongoDB is used?

MongoDB is built on a scale-out architecture that has become popular with developers of all kinds for developing scalable applications with evolving data schemas. As a document database, MongoDB makes it easy for developers to store structured or unstructured data.

What is DataMongoTest?

@DataMongoTest is an annotation that is used to test the MongoDB components of our application. Applied to a test class it will disable the full-auto-configuration and instead configure only those components, that are relevant for MongoDB tests.

How do you write a spring boot test?

Contents

1. Create a Spring Boot App for Testing with JUnit 5.
2. Create a Java REST API with Spring Boot for Your JUnit 5 Testing.
3. Run Your Basic Spring HTTP REST API.
4. Secure Your JUnit 5 Java App with OAuth 2.0.
5. Test Your Secured Spring Boot Application with JUnit 5.
6. Add Unit and Integration Test to Your Java App with JUnit 5.

What is MongoOperations?

public interface MongoOperations extends FluentMongoOperations. Interface that specifies a basic set of MongoDB operations. Implemented by MongoTemplate . Not often used but a useful option for extensibility and testability (as it can be easily mocked, stubbed, or be the target of a JDK proxy).

How do you update a particular field in MongoRepository interface in MongoDB?

As of today, you can’t update the document using MongoRepository using one query. If you really want to update a particular field using MongoRepository then following is the steps: Fetch the document that you want to update. Set the new value to a particular field and save that document.

How does MongoDB store data?

The data stored in the MongoDB is in the format of BSON documents. Here, BSON stands for Binary representation of JSON documents. Or in other words, in the backend, the MongoDB server converts the JSON data into a binary form that is known as BSON and this BSON is stored and queried more efficiently.

Is MongoDB a server?

MongoDB is a source-available cross-platform document-oriented database program….MongoDB.

Developer(s)	MongoDB Inc.
Type	Document-oriented database
License	Server Side Public License
Website	www.mongodb.com

What is @SpringBootTest used for?

The @SpringBootTest annotation is useful when we need to bootstrap the entire container. The annotation works by creating the ApplicationContext that will be utilized in our tests. We can use the webEnvironment attribute of @SpringBootTest to configure our runtime environment; we’re using WebEnvironment.

How does @SpringBootTest work?

@SpringBootTest This annotation works by creating the ApplicationContext used in our tests through SpringApplication. It starts the embedded server, creates a web environment and then enables @Test methods to do integration testing. By default, @SpringBootTest does not start a server.