[Solved] Which of the following is the correct way to define a custom pipe class in NestJS?export class MyPipe implements PipeTransform { transform(value: any, metadata: ArgumentMetadata) { // logic here } } | NestJS

NestJS - Pipes

Which of the following is the correct way to define a custom pipe class in NestJS?

export class MyPipe implements PipeTransform {
  transform(value: any, metadata: ArgumentMetadata) {
    // logic here
  }
}

Aexport class MyPipe implements PipeTransform { transform(value: any) { } }

Bexport class MyPipe implements PipeTransform { transform(value: any, metadata: ArgumentMetadata) { } }

Cexport function MyPipe(value: any) { return value; }

Dexport class MyPipe { transform(value: any, metadata: ArgumentMetadata) { } }

Step-by-Step Solution

Solution:

Step 1: Recall the PipeTransform interface signature
The transform method must accept two parameters: value and metadata of type ArgumentMetadata.
Step 2: Check which option matches the correct method signature
export class MyPipe implements PipeTransform { transform(value: any, metadata: ArgumentMetadata) { } } correctly implements the transform method with both parameters and the class implements PipeTransform.
Final Answer:
export class MyPipe implements PipeTransform { transform(value: any, metadata: ArgumentMetadata) { } } -> Option B
Quick Check:
transform(value, metadata) = correct signature [OK]

Quick Trick: transform method needs value and metadata parameters [OK]

Common Mistakes:

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