Cursor-rules-java 312-frameworks-spring-data-jdbc

Use when you need to use Spring Data JDBC with Java records — including entity design with records, repository pattern, immutable updates, aggregate relationships, custom queries, transaction management, and avoiding N+1 problems. Part of the skills-for-java project

install

source · Clone the upstream repo

git clone https://github.com/jabrena/cursor-rules-java

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/jabrena/cursor-rules-java "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/312-frameworks-spring-data-jdbc" ~/.claude/skills/jabrena-cursor-rules-java-312-frameworks-spring-data-jdbc && rm -rf "$T"

manifest: skills/312-frameworks-spring-data-jdbc/SKILL.md

Spring Data JDBC with Records

Apply Spring Data JDBC guidelines with Java records.

What is covered in this Skill?

Records for entity classes (immutable, constructor-friendly)
@Table for naming when record name differs from the table name
@Embedded to inline value-object columns into the parent row without a separate table
Repository pattern
Immutable updates with static factories for new rows and with* helpers for updates
save() INSERT vs UPDATE semantics driven by @Id nullability
Aggregate boundaries: one repository per aggregate root, Set for one-to-many inside the root, foreign keys between aggregates
Custom queries with @Query and named parameters (no user-input concatenation)
Transaction management (@Transactional on services; readOnly where appropriate)
Single query loading (N+1 avoidance)

Scope: Apply recommendations based on the reference rules and good/bad code examples.

Constraints

Before applying any Spring Data JDBC changes, ensure the project compiles. If compilation fails, stop immediately. After applying improvements, run full verification.

MANDATORY: Run
```
./mvnw compile
```
or
```
mvn compile
```
before applying any change
SAFETY: If compilation fails, stop immediately
VERIFY: Run
```
./mvnw clean verify
```
or
```
mvn clean verify
```
after applying improvements
BEFORE APPLYING: Read the reference for detailed rules and good/bad patterns

When to use this skill

Review Java code for Spring Data JDBC
Apply best practices for Spring Data JDBC in Java code

Reference

For detailed guidance, examples, and constraints, see references/312-frameworks-spring-data-jdbc.md.