@nestjs-yalc/field-middleware

Field parsing, transformation, and validation helpers for DTOs, GraphQL fields, and TypeORM entities.

Use this package for common field-level behavior such as parsing query strings, normalizing nullable timestamps, handling decimal values, validating string formats, and defining TypeORM transformers.

Installation

npm install @nestjs-yalc/field-middleware

Main Exports

• ParseArray, ParseBoolean, ParseNumber, and ParseInt transformers.
• decimalMiddleware and nullableTimestampMiddleware GraphQL field middleware.
• TypeORM transformers such as enumTransformer and defaultDateTransformer.
• StringFormatMatchValidation, DateValidation, and validation helpers.
• StringFormatEnum, DateCheckTypeEnum, and field error enums.

Example

import { ParseBoolean, ParseInt } from '@nestjs-yalc/field-middleware';

class ListUsersQuery {
  @ParseInt()
  top?: number;

  @ParseBoolean()
  includeDeleted?: boolean;
}