Change the interface of Transient Fields

[mizdra]

• Unblock Support additional fields #59
• No need to export internal APIs such as defineAuthorFactoryInternal
• Easy to define transient fields
• The interface is designed with reference to Design signature of arbitrary factory parameters Quramy/prisma-fabbrica#252

Before

import {
  defineAuthorFactoryInternal,
  dynamic,
  FieldsResolver,
  Traits,
  AuthorFactoryDefineOptions,
  AuthorFactoryInterface,
} from '../__generated__/fabbrica';
import { Author } from '../__generated__/types';

// Prepare custom `defineAuthorFactory` with transient fields
type AuthorTransientFields = {
  bookCount: number;
};
function defineAuthorFactoryWithTransientFields<
  _DefaultFieldsResolver extends FieldsResolver<Author & AuthorTransientFields>,
  _Traits extends Traits<Author, AuthorTransientFields>,
>(
  options: AuthorFactoryDefineOptions<AuthorTransientFields, _DefaultFieldsResolver, _Traits>,
): AuthorFactoryInterface<AuthorTransientFields, _DefaultFieldsResolver, _Traits> {
  return defineAuthorFactoryInternal(options);
}

// Use custom `defineAuthorFactory`
const AuthorFactory = defineAuthorFactoryWithTransientFields({
  defaultFields: {
    id: dynamic(({ seq }) => `Author-${seq}`),
    name: 'Komata Mikami',
    books: dynamic(async ({ get }) => {
      const bookCount = (await get('bookCount')) ?? 0;
      return BookFactory.buildList(bookCount);
    }),
    bookCount: 0,
  },
});

After

import {
  dynamic,
  FieldsResolver,
  Traits,
  AuthorFactoryDefineOptions,
  AuthorFactoryInterface,
} from '../__generated__/fabbrica';
import { Author } from '../__generated__/types';

const AuthorFactory = defineAuthorFactory.withTransientFields({
  bookCount: 0,
})({
  defaultFields: {
    id: dynamic(({ seq }) => `Author-${seq}`),
    name: 'Komata Mikami',
    books: dynamic(async ({ get }) => {
      const bookCount = (await get('bookCount')) ?? 0;
      return BookFactory.buildList(bookCount);
    }),
  },
});

Breaking Changes

• defineXxxFactoryInternal is not exported now. Use defineXxxFactory.withTransientFields to define Transient Fields.