debug:nestjs
NestJS Debugging Guide
This guide provides a systematic approach to debugging NestJS applications. Use the four-phase methodology below to efficiently identify and resolve issues.
Common Error Patterns
1. Dependency Resolution Errors
Error Message:
Nest can't resolve dependencies of the <ProviderName> (?). Please make sure that the argument <DependencyName> at index [0] is available in the <ModuleName> context.
Common Causes:
- Provider not added to module's
providersarray - Missing
@Injectable()decorator on service class - Incorrect import/export between modules
- Typo in injection token name
- Missing
forRoot()/forRootAsync()configuration
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