NestJS - Pipes
Which of the following is the correct way to use
DefaultValuePipe to set a default value of 10 for a query parameter named page?Which of the following is the correct way to use DefaultValuePipe to set a default value of 10 for a query parameter named page?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Check the syntax for using pipes in NestJS
Pipes are instantiated with thenewkeyword and passed as the second argument to decorators like@Query.Step 2: Confirm the correct usage of DefaultValuePipe
The DefaultValuePipe requires a value in its constructor, sonew DefaultValuePipe(10)is correct.Final Answer:
@Query('page', new DefaultValuePipe(10)) page: number -> Option AQuick Check:
Usenew DefaultValuePipe(value)with decorator [OK]
Quick Trick: Always use 'new' to instantiate DefaultValuePipe [OK]
Common Mistakes:
- Omitting 'new' keyword when creating the pipe
- Passing DefaultValuePipe without parentheses
- Assigning default value directly in parameter without pipe
Master "Pipes" in NestJS
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