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typescript•Jan 8, 2026
How to Fix Swagger UI Freezing Due to Circular References in NestJS
Circular entity relationships can cause Swagger UI to freeze when rendering schemas. This guide provides a solution to automatically break these circular references without modifying your entities.
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Original source
Key summary
This guide shows how to automatically break circular references in Swagger UI without modifying your entities. This is useful for applications with bidirectional relationships, such as a blog platform with authors and books.
TL;DR
- Circular references in Swagger UI can cause it to freeze.
- This guide shows how to automatically break these circular references without modifying your entities.
- The solution uses an algorithm to detect and remove back-references in the OpenAPI schema.
- Entities remain clean and unchanged, with no need for manual intervention.
- The utility automatically finds all circular references in your schema.
- New entities with circular relationships are automatically detected and processed.
- The solution only affects the OpenAPI schema for documentation purposes, leaving actual API responses unchanged.
- The utility logs which circular pairs were detected and which shallow schemas were created.
This content is automatically summarized using AI. For full context, always refer to the original article.
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