# 315 Frameworks Spring Mongodb

> Use when you need to design or implement MongoDB data access in Spring Boot — including document modeling, Spring Data Mongo repositories/templates, indexing, optimistic concurrency, and error handling. This should trigger for requests such as Add MongoDB in Spring Boot; Review Spring Data Mongo design; Improve error handling for Mongo writes. Part of cursor-rules-java project

- Skill: `majiayu000/315-frameworks-spring-mongodb` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/315-frameworks-spring-mongodb`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/315-frameworks-spring-mongodb/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: Apache-2.0
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/315-frameworks-spring-mongodb

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# Spring Boot — MongoDB

Apply Spring Data MongoDB guidance with concrete examples for design, implementation, and error handling.

## Constraints

Compile before MongoDB refactors; verify after changes.

- **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 examples

## When to use this skill

- Add MongoDB in Spring Boot
- Review Spring Data Mongo repositories/documents
- Improve duplicate key handling, retries, or optimistic locking in Mongo flows

## Workflow

1. **Read reference and assess project context**

Read `references/315-frameworks-spring-mongodb.md` and inspect persistence setup before proposing changes.

2. **Gather scope and decide target improvements**

Identify data model, consistency, and query requirements to define safe improvements.

3. **Apply framework-aligned changes**

Implement/refactor mappings, repositories, indexes, and failure handling policies.

4. **Run verification and report results**

Execute build/tests and summarize what changed, what was verified, and follow-up actions.

## Reference

For detailed guidance, examples, and constraints, see [references/315-frameworks-spring-mongodb.md](references/315-frameworks-spring-mongodb.md).