To append a common where clause to all queries that run with Spring Data MongoRepository, you can create a custom implementation of the repository interface and override the methods to include the additional where clause. This approach allows you to modify the queries before they are executed. Here's how you can do it:

  1. Create the Custom Repository Interface:
    • Start by creating a custom repository interface that extends the original MongoRepository. Declare the common method(s) with the additional where clause that you want to append to all queries.
java
import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.NoRepositoryBean; @NoRepositoryBean public interface CustomMongoRepository<T, ID> extends MongoRepository<T, ID> { List<T> findAllWithCommonWhereClause(); // You can add more common methods here with the desired where clauses }
  1. Implement the Custom Repository:
    • Next, create the custom repository implementation by extending SimpleMongoRepository and implementing the custom methods. In these methods, modify the queries to include the additional where clause.
java
import org.springframework.data.mongodb.core.MongoOperations; import org.springframework.data.mongodb.repository.support.SimpleMongoRepository; import org.springframework.stereotype.Repository; @Repository public class CustomMongoRepositoryImpl<T, ID> extends SimpleMongoRepository<T, ID> implements CustomMongoRepository<T, ID> { private final MongoOperations mongoOperations; public CustomMongoRepositoryImpl(MongoOperations mongoOperations, MongoEntityInformation<T, ID> metadata) { super(metadata, mongoOperations); this.mongoOperations = mongoOperations; } @Override public List<T> findAllWithCommonWhereClause() { // Modify the query with the additional where clause // Example: Find all entities where "status" is "ACTIVE" Query query = new Query(Criteria.where("status").is("ACTIVE")); return mongoOperations.find(query, getEntityInformation().getJavaType()); } }
  1. Enable Custom Repositories:
    • In your Spring configuration, make sure to enable custom repositories by setting the repositoryBaseClass attribute in @EnableMongoRepositories.
java
import org.springframework.context.annotation.Configuration; import org.springframework.data.mongodb.repository.config.EnableMongoRepositories; @Configuration @EnableMongoRepositories(basePackages = "com.example.repository", repositoryBaseClass = CustomMongoRepositoryImpl.class) // Specify your custom repository implementation class public class MongoConfig { // Other configuration beans... }
  1. Use the Custom Repository:
    • Now you can use your custom repository interface, CustomMongoRepository, just like any other repository. The custom method findAllWithCommonWhereClause() will be available for all entities.
java
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class YourService { private final CustomMongoRepository<YourEntity, String> yourRepository; @Autowired public YourService(CustomMongoRepository<YourEntity, String> yourRepository) { this.yourRepository = yourRepository; } public List<YourEntity> findActiveEntities() { return yourRepository.findAllWithCommonWhereClause(); } }

With this setup, the findAllWithCommonWhereClause() method will include the common where clause for all entities of type YourEntity when fetching data from the MongoDB database. You can create additional common methods in CustomMongoRepository to append other common where clauses based on your requirements.

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