Question

我要向我的减速器发送很多东西

export const setStudent = (data, value, year, group, showStudent) => ({
    type: "SET_STUDENT",
    data,
    value,
    year,
    group,
    showStudent
});

在我的化简器中，我将需要排序的数据以及相关参数发送给它：

  case "SET_STUDENT":
        let studentName = data
            .find(option => {
                return option.id == year;
            })
            .options.find(option => {
                return option.id == group;
            })
            .options.find(option => {
                return option.id == value;
            }).label;

        return { ...state, student: value, label: studentName };

我可以将其导入data中，而不是发送reducer，就像这样：

import { data } from "../config/calendars.js";

我的mapDispatchToProps也变得非常混乱：

const mapDispatchToProps = dispatch => ({
    fetchEvents: id => dispatch(fetchEvents(id)),
    isLoadingCredentials: loadingCredentials =>
        dispatch(isLoadingCredentials(loadingCredentials)),
    setCredentials: credentials => dispatch(setCredentials(credentials)),
    setYear: year => dispatch(setYear(year)),
    setGroup: (group, data, year) =>
        dispatch(setGroup(group, data, year)),
    setStudent: (data, e, year, group, showStudent) =>
        dispatch(setStudent(data, e, year, group, showStudent)),
    resetForm: () => dispatch(resetForm()),
    setAuthenticated: value => dispatch(setAuthenticated(value))
});

Answer 1

您可以使用"object shorthand" form of mapDispatch来大大简化代码。只需使用动作创建者定义一个对象，例如：

const mapDispatchToProps = {
    fetchEvents,
    isLoadingCredentials,
    setCredentials,
    setYear,
    setGroup,
    setStudent,
    resetForm,
    setAuthenticated,
}

此外，我猜您可能可以将其中一些“设置”操作合并为单个"USER_FORM_UPDATED"操作或类似操作。

Answer 2

如果数据是静态对象，则可以从reducer导入它。它将保持纯功能。但是我会尽可能简化我的化简器，也许我会将此逻辑移至动作创建者。这就是为什么我们首先要创建动作创建者，使他们也可以包含逻辑的原因。

例如：

import { data } from "../config/calendars.js";

export const setStudent = (value, year, group, showStudent) => {
  let studentName = data
    .find(option => {
      return option.id == year;
    })
    .options.find(option => {
      return option.id == group;
    })
    .options.find(option => {
      return option.id == value;
    }).label;

  return {
    type: "SET_STUDENT",
    student: value,
    label: studentName
  };
}

动作创建者，太多参数传递给减速器

2 个答案: