Validating data with pipes and guards
Pipes and guards are like the keen-eyed bouncers at a prestigious club, ensuring every guest (all data, in our case) meets the requisite criteria before entry.
Pipes – transforming and validating
Pipes operate in two main capacities: data transformation and data validation. By chaining multiple pipes, you can ensure data integrity and uniformity across your application.
See the following for a brief overview:
import {
PipeTransform,
Injectable,
ArgumentMetadata
} from '@nestjs/common';
@Injectable()
export class SamplePipe implements PipeTransform {
transform(value: any, metadata: ArgumentMetadata) {
// Validation or transformation logic here
return transformedValue;
}
} We can break this code down as follows:
Imports:- The
PipeTransforminstance is a contract that our custom pipes will adhere to. - The
Injectable...
- The
