在mapDispatchToProps中使用分派时使用哪个reducer？

Question

我正在学习Redux，我有两个reducer，一个contactReducer用于在页面上显示联系人，还有一个testReducer可以用来摆弄。在我的一个组件文件中，我具有此功能：

const mapDispatchToProps = (dispatch) => ({
  getContacts: () => dispatch({ type: "TEST_ACTION" }),
});

这是我的两个减速器文件：contactReducer：

import { GET_CONTACTS } from "../actions/types";

const initialState = {
  contacts: [
    {
      id: 1,
      name: "John Doe",
      email: "[email protected]",
      phone: "555-555-5555",
    },
    {
      id: 2,
      name: "Karen Williams",
      email: "[email protected]",
      phone: "444-444-4444",
    },
    {
      id: 3,
      name: "Henry Johnson",
      email: "[email protected]",
      phone: "333-333-333",
    },
  ],
};

export default function (state = initialState, action) {
  switch (action.type) {
    case GET_CONTACTS:
      return {
        ...state,
      };
    default:
      console.log("testing action in contactReducer");
      return state;
  }
}

和testReducer：

import { GET_CONTACTS } from "../actions/types";

const initialState = {
  contactsTest: [
    {
      id: 1,
      name: "ffffffffffff",
      email: "[email protected]",
      phone: "555-555-5555",
    },
    {
      id: 2,
      name: "ggggggggggggg",
      email: "[email protected]",
      phone: "444-444-4444",
    },
    {
      id: 3,
      name: "aaaaaaaaaaaaaa",
      email: "[email protected]",
      phone: "333-333-333",
    },
  ],
};

export default function (state = initialState, action) {
  switch (action.type) {
    case "TEST_ACTION":
      return {
        ...state,
      };
    default:
      console.log("testing action");
      return state;
  }
}

因此，我在reducer文件中的console.log语句中注意到，对于每个联系人，contactReducer和testReducer的函数都在此行中被调用：

  getContacts: () => dispatch({ type: "TEST_ACTION" }),
});

如果我有多个化简器，但我只想调用它们的一个函数进行调度，那我该怎么办？

Answer 1

combineReducers，是redux中的帮助函数，可帮助您划分减速器。看一下这个链接：LINK