All files / src/decorators user-transform.decorator.ts

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import {property} from '@loopback/repository';
import {Type, Expose, Transform} from 'class-transformer';
import _ from 'lodash';
 
/**
 * Custom decorator to handle User transformation
 * @param exposeName - The name to expose in the response
 * @param groups - Optional class-transformer groups
 */
export function UserTransform(exposeName: string, groups: string[] = []) {
  return function (target: any, key: string) {
    // Apply LoopBack's @property decorator
    property({
      type: 'object',
      jsonSchema: {nullable: true},
    })(target, key);
 
    // Apply class-transformer's Type, Transform, and Expose decorators
    Type(() => Object)(target, key);
    Transform(({value}) => _.pick(value, ['name', 'id']))(target, key);
    Expose({name: exposeName, groups})(target, key);
  };
}