Fix Circular Dependencies Issue in NestJS
In this lesson, we tackle one of the most common and confusing problems in NestJS: cyclic (circular) dependency errors.
If you’ve ever seen errors like:
Nest can’t resolve dependencies of…
or
Circular dependency detected…
this video will help you understand why it happens and how to fix it properly.
📚 What You’ll Learn
✅ What cyclic (circular) dependency is in NestJS
✅ Why circular dependencies occur between modules and services
✅ Understanding NestJS dependency injection system
✅ Fixing cyclic dependency using forwardRef()
✅ Using ModuleRef to resolve dependencies dynamically
✅ Refactoring modules to avoid circular dependencies
✅ Best practices to prevent cyclic dependencies
✅ Real-world examples and common mistakes