GH-2591 - Fix StackOverflow on first level of recursive projections.

Closes #2591

Author: meistermeier

src/main/java/org/springframework/data/neo4j/core/Neo4jTemplate.java

@@ -72,6 +72,7 @@
 import org.springframework.data.neo4j.core.mapping.DtoInstantiatingConverter;
 import org.springframework.data.neo4j.core.mapping.EntityFromDtoInstantiatingConverter;
 import org.springframework.data.neo4j.core.mapping.EntityInstanceWithSource;
+import org.springframework.data.neo4j.core.mapping.IdDescription;
 import org.springframework.data.neo4j.core.mapping.MappingSupport;
 import org.springframework.data.neo4j.core.mapping.Neo4jMappingContext;
 import org.springframework.data.neo4j.core.mapping.Neo4jPersistentEntity;
@@ -978,7 +979,8 @@ private Entity saveRelatedNode(Object entity, NodeDescription<?> targetNodeDescr
 			@SuppressWarnings("unchecked")
 			Map<String, Object> properties = (Map<String, Object>) tree.get(Constants.NAME_OF_PROPERTIES_PARAM);
 			String idPropertyName = targetPersistentEntity.getIdProperty().getPropertyName();
-			boolean assignedId = targetPersistentEntity.getIdDescription().isAssignedId();
+			IdDescription idDescription = targetPersistentEntity.getIdDescription();
+			boolean assignedId = idDescription.isAssignedId() || idDescription.isExternallyGeneratedId();
 			if (!includeProperty.isNotFiltering()) {
 				properties.entrySet()
 						.removeIf(e -> {

src/main/java/org/springframework/data/neo4j/core/PropertyFilterSupport.java

@@ -146,8 +146,10 @@ private static void addPropertiesFrom(Class<?> domainType, Class<?> returnedType
 					TypeInformation<?> typeInformation = currentTypeInformation.getProperty(nestedInputProperty.getName());
 					ProjectionPathProcessor nextProjectionPathProcessor = projectionPathProcessor.next(nestedInputProperty, typeInformation);
 
-					if (projectionPathProcessor.isChildLevel() && (domainType.equals(nextProjectionPathProcessor.typeInformation.getType())
-					|| returnedType.equals(nextProjectionPathProcessor.typeInformation.getType()))) {
+					if (projectionPathProcessor.isChildLevel() &&
+							(domainType.equals(nextProjectionPathProcessor.typeInformation.getType())
+							|| returnedType.equals(nextProjectionPathProcessor.typeInformation.getActualType().getType())
+							|| returnedType.equals(nextProjectionPathProcessor.typeInformation.getType()))) {
 						break;
 					}
 

src/main/java/org/springframework/data/neo4j/core/ReactiveNeo4jTemplate.java

@@ -19,6 +19,7 @@
 import static org.neo4j.cypherdsl.core.Cypher.asterisk;
 import static org.neo4j.cypherdsl.core.Cypher.parameter;
 
+import org.springframework.data.neo4j.core.mapping.IdDescription;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.util.function.Tuple2;
@@ -1068,7 +1069,8 @@ private Mono<Entity> saveRelatedNode(Object relatedNode, Neo4jPersistentEntity<?
 					@SuppressWarnings("unchecked")
 					Function<Object, Map<String, Object>> binderFunction = neo4jMappingContext.getRequiredBinderFunctionFor(entityType);
 					String idPropertyName = targetNodeDescription.getIdProperty().getPropertyName();
-					boolean assignedId = targetNodeDescription.getIdDescription().isAssignedId();
+					IdDescription idDescription = targetNodeDescription.getIdDescription();
+					boolean assignedId = idDescription.isAssignedId() || idDescription.isExternallyGeneratedId();
 					binderFunction = binderFunction.andThen(tree -> {
 						@SuppressWarnings("unchecked")
 						Map<String, Object> properties = (Map<String, Object>) tree.get(Constants.NAME_OF_PROPERTIES_PARAM);

src/main/java/org/springframework/data/neo4j/core/TemplateSupport.java

@@ -44,6 +44,7 @@
 import org.springframework.data.mapping.PropertyPath;
 import org.springframework.data.neo4j.core.mapping.Constants;
 import org.springframework.data.neo4j.core.mapping.EntityInstanceWithSource;
+import org.springframework.data.neo4j.core.mapping.IdDescription;
 import org.springframework.data.neo4j.core.mapping.Neo4jMappingContext;
 import org.springframework.data.neo4j.core.mapping.Neo4jPersistentEntity;
 import org.springframework.data.neo4j.core.mapping.Neo4jPersistentProperty;
@@ -280,7 +281,8 @@ static <T> FilteredBinderFunction<T> createAndApplyPropertyFilter(
 			Map<String, Object> properties = (Map<String, Object>) tree.get(Constants.NAME_OF_PROPERTIES_PARAM);
 
 			String idPropertyName = entityMetaData.getIdProperty().getPropertyName();
-			boolean assignedId = entityMetaData.getIdDescription().isAssignedId();
+			IdDescription idDescription = entityMetaData.getIdDescription();
+			boolean assignedId = idDescription.isAssignedId() || idDescription.isExternallyGeneratedId();
 			if (!includeProperty.isNotFiltering()) {
 				properties.entrySet()
 						.removeIf(e -> {

src/test/java/org/springframework/data/neo4j/integration/movies/imperative/AdvancedMappingIT.java

@@ -132,6 +132,12 @@ interface MovieWithSequelEntity {
 		Movie getSequel();
 	}
 
+	interface MovieWithMovieList {
+		String getTitle();
+
+		List<MovieWithMovieList> getSequel();
+	}
+
 	interface MovieRepository extends Neo4jRepository<Movie, String> {
 
 		MovieProjection findProjectionByTitle(String title);
@@ -496,6 +502,19 @@ void mapPathWithMultipleSameTypeRelationships(@Autowired MovieRepository reposit
 		assertThat(movies.get(0).getActors()).hasSize(6);
 	}
 
+	@Test // GH-2591
+	void createPropertyFilterPathCorrectly(@Autowired Neo4jTemplate neo4jTemplate) {
+		Movie movie = new Movie("Test", "Movie");
+		neo4jTemplate.saveAs(movie, MovieWithMovieList.class);
+
+		Movie foundMovie = neo4jTemplate.findOne("MATCH (m:Movie{title:'Test'}) return m", Collections.emptyMap(), Movie.class).get();
+		assertThat(foundMovie.getTitle()).isEqualTo("Test");
+		assertThat(foundMovie.getDescription()).isNull();
+
+		// clean up to keep the other tests healthy
+		neo4jTemplate.deleteById("Test", Movie.class);
+	}
+
 	@Configuration
 	@EnableTransactionManagement
 	@EnableNeo4jRepositories(considerNestedRepositories = true)