[Solved] Given this NestJS controller method: @Get(':active') getStatus(@Param('active', ParseBoolPipe) active: boolean) { return active ?... } What will be the response if the client requests /true? | NestJS

NestJS - Pipes

Given this NestJS controller method:

@Get(':active')
getStatus(@Param('active', ParseBoolPipe) active: boolean) {
  return active ? 'Active' : 'Inactive';
}

What will be the response if the client requests /true?

A"Active"

B"Inactive"

C400 Bad Request error

D"true"

Step-by-Step Solution

Solution:

Step 1: Understand ParseBoolPipe behavior
ParseBoolPipe converts string 'true' to boolean true.
Step 2: Evaluate the method return based on boolean value
Since active is true, the method returns 'Active'.
Final Answer:
"Active" -> Option A
Quick Check:
Input 'true' -> boolean true -> returns 'Active' [OK]

Quick Trick: ParseBoolPipe converts 'true' string to boolean true [OK]

Common Mistakes:

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