NestJS - Guards
Why is it important to use the
Reflector class instead of directly using Reflect.getMetadata in NestJS guards?Why is it important to use the Reflector class instead of directly using Reflect.getMetadata in NestJS guards?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Reflector advantages
Reflector provides a convenient API that respects inheritance and merges metadata from class and method contexts.Step 2: Clarify misconceptions
Reflect.getMetadata is not deprecated, Reflector does not set metadata, and Reflect.getMetadata works on both classes and methods.Final Answer:
Because Reflector abstracts metadata retrieval and handles inheritance and context properly -> Option DQuick Check:
Reflector manages metadata context and inheritance = B [OK]
Quick Trick: Reflector handles inheritance and context better than Reflect.getMetadata [OK]
Common Mistakes:
- Thinking Reflect.getMetadata is deprecated
- Assuming Reflector sets metadata
- Believing Reflect.getMetadata only works on classes
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