MongoRepository Delete Method - spring

Question

Good afternoon fellow coders!
I have spent the last hour looking to delete a single document from my mongo "testCollection". I would like to make use of the MongoRepository delete / deleteAll methods. However, it does not remove the document. It persists regardless of how many times I run the test class method. No errors are reported and the user has readWrite permissions in the database. I am able to run the mongo command to remove the newly created test document.
I have read about using the mongo template and create it for the deletion to be performed. I'm happy to do that but I would rather keep it as simple as possible.
import lombok.Data;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.MongoId;
#Data
#Document(collection = "testCollection")
public class TestClass {
#MongoId
private String id;
private String name;
public TestClass(String name) {
this.name = name;
}
}
Test Class Mongo Repository interface
import org.springframework.data.mongodb.repository.MongoRepository;
import java.util.List;
public interface TestClassRepository extends MongoRepository<TestClass, String> {
public List<TestClass> findAllByName(String name);
public void deleteAllByIdIn(List<TestClass> list);
}
Test Method
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
#RunWith(SpringRunner.class)
#TestPropertySource(value = {"classpath:application.properties"})
#AutoConfigureMockMvc
public class testClassTest {
#Autowired
private TestClassRepository testClassRepository;
#Test
public void crudTest() {
TestClass testObj = new TestClass("Test");
testClassRepository.save(testObj);
List<TestClass> testClassList = testClassRepository.findAllByName("Test");
Assert.assertEquals(1, testClassList.size());
TestClass test = testClassList.get(0);
testClassRepository.deleteAllByIdIn(testClassList);
// Fails this assertion: Found 1, expected 0.
Assert.assertEquals(0, testClassRepository.findAllByName("Test").size());
}
}
As anyone else experienced a similar issue? If so, how'd you go about resolving it?
Thanks!
Additions to original post:
Here is the mongo query generated by the MongoRepository. It appears that it is not actually adding the "remove" mongo command to the query. Query: { "name" : "Test"}, Fields: {}, Sort: {}

Answer 1

With a stroke of dumb luck I managed to figure out the issue. The problem was with the type of identifier annotation I was using. This explanation from another stackoverflow user (What is use of #MongoId in Spring Data MongoDB over #Id?) had me revisit this aspect of the model.
I switched the identifier annotation from #MongoId to #Id. Since I have both JPA and MongoDB annotations I needed to make sure I chose the one from the org.springframework.data.annotation package rather than the javax.persistance package.
Hope this explanation helps others!