spring-data-neo4j

Spring Data Neo4j integration for graph databases with repositories, Cypher queries, and reactive operations. Provides Spring Data Neo4j integration patterns for Spring Boot applications. Covers node entity mapping with @Node and @Relationship , repository configuration (imperative and reactive), custom Cypher queries with @Query , and integration testing with embedded Neo4j databases. Use this skill when working with: Add the dependency: Maven: Gradle: Configure connection in application.properties: Configure Cypher-DSL dialect (recommended): Validation Checkpoint : Run MATCH (n) RETURN count(n) via cypher-shell to verify the connection works before proceeding. Validation Checkpoint : If entity save fails, check for constraint violations—duplicate IDs violate uniqueness constraints. Validation Checkpoint : Test repository with findAll() first—if empty, verify the Neo4j instance is running and credentials are correct. Validation Checkpoint : If tests fail with "Connection refused", ensure the embedded Neo4j started successfully in @BeforeAll . Imperative vs Reactive: Custom Query Best Practices: Test Configuration: Input: Output: Input: Output: Input: Output: Progress from basic to advanced examples covering complete movie database, social network patterns, e-commerce product catalogs, custom queries, and reactive operations.