Ant Desgin Pro 如何将将异步得到的数据赋值给state

Question

想法是从数据库里读取的数据赋值给state。但是这样写materialsInfo没有值。如何改呢

 componentDidMount() {
    const { dispatch, match, materials={}} = this.props;
    const { params } = match;
    const { materialsInfo = {} } = materials;
    dispatch({
      type: 'materials/fetchDetail',
      payload: params.uid,
    });   
    this.setState({
      formType: materialsInfo.type  // 最终就是想把materialsInfo.type赋值给formType
    })
    
  }

model文件

import { 
  queryMaterialsDetail, 
} from '@/services/api';
import { Modal } from 'antd';

export default {
  namespace: 'materials',

  state: {
    
  },

  effects: {
    *fetchDetail({ payload}, { call, put }) {
      const response = yield call(queryMaterialsDetail, payload);
      yield put({
        type: 'show',
        payload: response,
      });
    },
  },

  reducers: {
    show(state, { payload }) {
      return {
        ...state,
        ...payload,
      };
    },
  },
};

Answer 1

为什么不直接用materialsInfo.type呢？要this.state.formType 干什么？确实需要的话可以用dispatch的callback函数setState