javascript - 如何删除 redux reducer 中的购物车项目？

Question

[![在此处输入图像描述][1]][1]我是 ReactJS 和 Redux 的新手。在我的应用程序中，我有 CartPage 显示所有 CartItems 以及删除按钮以删除任何购物车项目。

下面是我的 reducer 代码片段，用于删除购物车项目，但此代码似乎不起作用。

下面我想删除数组中的 customerCartItem 如何删除可以帮助我

任何人都可以帮助我如何实现这一目标

//action
export const deleteCustomerCartSuccess = payload => ({
  payload,
  type: constants.CUSTOMER_CART_DELETE_SUCCESS,
})


   import * as constants from '../constants/CartPage';    
        const initialState = {
          customerCartDetails: {},
          id: ''
        };
        const reducer = (state = initialState, action) => {
          switch (action.type) {
            case constants.CUSTOMER_CART_DETAILS_SUCCESS: {
              return {
                ...state,
                customerCartDetails: action.payload.data,
              };
            }
            case constants.CUSTOMER_CART_DELETE_SUCCESS: {
              console.log('REMOVE_REDUCER', action.payload, state.customerCartDetails.filter(item => item.id !== action.payload.id));
              return {
                ...state,
                customerCartDetails: state.customerCartDetails.CustomerCartItem.filter(item => item.id !== action.payload.id)
              };
            }    
            default: {
              return state;
            }
          }
        };


//Component 

 removeCartItem(index) {
    const { deleteCustomerCartSuccess } = this.props;
    deleteCustomerCartSuccess(index)
}

Answer 1

几件事:

    // Create a types.js to hold all your action constants
    import { CUSTOMER_CART_DETAILS_SUCCESS, CUSTOMER_CART_DELETE_SUCCESS } from './types'

    // Not necessary, but if you'll be logging a lot, consider destructuring
    const { log } = console;

    const initialState = {
      // This should be an array, not an object, if you'll be using the filter method
      customerCartItem: [],
      // When initializing, make sure to set to initial state to empty arrays, objects and null values
      id: null
    };

    const reducer = (state = initialState, action) => {
      // Destructure these two from the action object
      const { type, payload } = action;
      switch (type) {
        case CUSTOMER_CART_DETAILS_SUCCESS: {
          log('CUSTOMER_CART_DETAILS_SUCCESS', payload.data);
          return {
            ...state,
            customerCartItem: payload.data,
          };
        }
        case CUSTOMER_CART_DELETE_SUCCESS: {
          log('REMOVE_REDUCER', payload);
          return {
            ...state,
            // After your edit:
            customerCartItem: state.customerCartItem.filter(item => item.id !== payload.id)
          };
        }    
        default: {
          return state;
        }
      }
    };