QueryTransformPipe

NestJS pipe for query parameter normalization.

import { QueryTransformPipe } from '@querry-kit/nest-util';

Constructor

QueryTransformPipe does not require constructor arguments.

const pipe = new QueryTransformPipe();

transform(value, metadata)

Transforms value when both conditions are true:

• metadata.type === 'query'
• typeof value === 'object'

Otherwise, the original value is returned unchanged.

const pipe = new QueryTransformPipe();

pipe.transform({ page: '1', 'where.name': 'Ada' }, { type: 'query' } as never);

// { page: 1, where: { name: 'Ada' } }

NestJS Usage

Global registration:

app.useGlobalPipes(new QueryTransformPipe());

Route-level registration:

@UsePipes(new QueryTransformPipe())
@Get()
findMany(@Query() query: unknown) {
  return query;
}

Notes

• The pipe is decorated as injectable for NestJS compatibility.
• The parsing behavior is implemented by the parseObject object utility function.
• Validation is intentionally outside the pipe's responsibility.