What is spring MongoTemplate?

Table of Contents

The MongoTemplate class is the primary implementation of MongoOperations 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.

How do you test MongoRepository spring?

How to unit test a Spring Boot MongoRepository?

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

What is MongoRepository in spring?

MongoDB is a document-based NoSQL database, providing high performance and high availability. Spring provides seamless integration with the Mongo database through Spring Data MongoDB which is a part of Spring Data project.

When using Spring Data The role of the MongoRepository interface is?

MongoRepository extends the PagingAndSortingRepository and QueryByExampleExecutor interfaces that further extends 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.

What is MongoTemplate return?

Returns the number of documents for the given Query querying the given collection. Retrieve and remove all documents matching the given query by calling find(Query, Class, String) and remove(Query, Class, String) , whereas the Query for remove(Query, Class, String) is constructed out of the find result.

How do I use MongoRepository in spring boot?

6. Using MongoRepository

6.1. Insert. First – the state of the database before running the insert: { }
6.2. Save – Insert. Similarly – save works the same as the save operation in the MongoTemplate API.
6.3. Save – Update.
6.4. Delete.
6.5. FindOne.
6.6. Exists.
6.7. FindAll With Sort.
6.8. FindAll With Pageable.

How MongoDB is embedded in spring boot?

3. Test Using Embedded MongoDB

3.1. Spring Boot Test. After adding de.
3.2. Manual Configuration Test. Spring Boot will automatically start and configure the embedded database and then inject MongoTemplate instance for us.
3.3. Logging.
3.4. Using a Real Database on Production.

Can we use MongoDB with spring boot?

It’s Easy to Connect MongoDB Atlas with Spring Boot Through this article, we demonstrated that MongoDB Spring Boot integration is easy using: Starter data MongoDB artifactid (the dependency we added while creating the Spring Initializr project) in pom. xml. A property on application.

What is spring data for?

Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.

Why bean is used in spring?

The objects that form the backbone of your application and that are managed by the Spring IoC container are called beans. A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container. These beans are created with the configuration metadata that you supply to the container.

Which is an example of spring data MongoDB?

In this Spring Data MongoDB Example, we will build a Simple Spring Application and perform CRUD operations on the Mongo Database with the help of Spring Data MongoDB and MongoRepository. MongoDB is a document-based NoSQL database, providing high performance and high availability.

How to query a MongoDB repository in springframework?

By adding the annotation org.springframework.data.mongodb.repository.Query repository finder methods you can specify a MongoDB JSON query string to use instead of having the query derived from the method name. For example The placeholder ?0 lets you substitute the value from the method arguments into the JSON query string.

How to use findbyfirstnameignorecase in spring?

In this case, the query method will be: findByFirstNameIgnoreCase → Return the customers matched with first name ( case insensitive ). It will generate query like- … where UPPER (x.first_name) = UPPER (?1) and return the customer whos first name like- Sandeep or sandeep or SANDEEP or sAnDeEp, etc.

Which is spring data derived findby query method?

In this case, the derived query method is will be: Spring Data also supports readBy, queryBy, and getBy which behave the same as findBy and gives the same outcome. In this example, we will create the derived query methods based on the use case and retrieve the data from the table. See the below: