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; Model MongoDB documents for a Spring Boot service; Configure Spring Data MongoDB indexes or transactions. Part of Plinth Toolkit
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---
name: 315-frameworks-spring-mongodb
description: 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; Model MongoDB documents for a Spring Boot service; Configure Spring Data MongoDB indexes or transactions. Part of Plinth Toolkit
license: Apache-2.0
metadata:
author: Juan Antonio Breña Moral
version: 0.19.0
---
# 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
- Model MongoDB documents for a Spring Boot service
- Configure Spring Data MongoDB indexes or transactions
## 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).
