ngrx/data-如何编写自定义缩减程序来处理返回多个实体的端点？

import { createReducer, on } from '@ngrx/store';
import { EntityAdapter, createEntityAdapter } from '@ngrx/entity';
import { loadSuccessAction, queryAllSuccessAction } from './actions';
import { EntityState } from './state';
import { Entity } from './models';

// 创建实体适配器
const adapter: EntityAdapter<Entity> = createEntityAdapter<Entity>();

// 初始状态
const initialState: EntityState = adapter.getInitialState();

// 创建自定义缩减程序
const customReducer = createReducer(
  initialState,
  on(loadSuccessAction, (state, { entities }) => {
    // 合并返回的实体数据
    const mergedEntities = state.entities.concat(entities);

    // 更新状态
    return { ...state, entities: mergedEntities };
  }),
  on(queryAllSuccessAction, (state, { entities }) => {
    // 转换返回的实体数据
    const transformedEntities = entities.map(entity => ({
      id: entity.id,
      name: entity.name,
      // 进行其他转换操作
    }));

    // 更新状态
    return adapter.setAll(transformedEntities, state);
  })
);

// 导出自定义缩减程序
export function reducer(state: EntityState, action: Action) {
  return customReducer(state, action);
}