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1. Customize JPA Repository base class:

   @SpringBootApplication@EnableJpaRepositories(repositoryBaseClass =ExpressionsRepositoryImpl.class)publicclassApplication { … }

2. Change your repository to extendExpressionsRepository:

   @RepositorypublicinterfaceEmployeeRepositoryextendsExpressionsRepository<Employee,Long> {}

3. Build the controller/service:

   @PostMapping("/search")publicResponseEntity<Page<EmployeeDto>>search(@RequestBodyExpressionsexpressions,Pageablepageable) {returnok().body(employeeRepository.findAll(expressions,pageable).map(employeeMapper::toDto)        );}

4. SendMongodb query in JSON from frontend:

   {"$or": [    {"lastName":"ibrahim"},    {"$and": [        {"firstName":"mostafa"},        {"birthDate": {"$gt":"1990-01-01"}}      ]    }  ]}

For a quick start seethis Medium postordev.to postor seethis demo example on Github.

Seedocumentation website for details about how to get started.

For spring-boot 3.x:

<dependency>  <groupId>com.github.mhewedy</groupId>  <artifactId>spring-data-jpa-mongodb-expressions</artifactId>  <version>0.1.10</version></dependency>

For spring-boot 2.x:

<dependency>  <groupId>com.github.mhewedy</groupId>  <artifactId>spring-data-jpa-mongodb-expressions</artifactId>  <version>0.0.8</version></dependency>

Special thanks toRashad Saif andHamada Elnoby for helping in the design, inspring with ideas, and for doing code review.

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