entity-metadata.ts

import { EntityMetadataMap } from '@ngrx/data';

/**
 * Compare function for Entities sort
 * @param {string} a
 * @param {string} b
 * @returns {number}
 */
export function sortByTitle(
  a: { title: string },
  b: { title: string }
): number {
  return a.title.localeCompare(b.title);
}

const entityMetadata: EntityMetadataMap = {
  Todo: {
    sortComparer: sortByTitle
  }
};

export const entityConfig = {
  entityMetadata
};