无法在我的 NextJS 14 应用程序中从 Redux Toolkit 2.0 提取数据

Question

我正在使用 redux 工具包创建一个 NextJs 14 电子商务应用程序进行状态管理。我使用我对 RTK 2.0 语法的最佳理解创建了一个切片来调用用户数据，以便将其添加到我的用户状态中。

"use client";

import { buildCreateSlice, asyncThunkCreator } from "@reduxjs/toolkit";

const createSliceWithThunks = buildCreateSlice({
  creators: {
    asyncThunk: asyncThunkCreator,
  },
});


const initialState = {
  user: {
    _id: "",
    fname: "",
    lname: "",
    email: "",
    streetAddress: "",
    postalCode: "",
    city: "",
    county: "",
    country: "",
  },
  loading: false,
  error: null,
};

const userSlice = createSliceWithThunks({
  name: "user",
  initialState,
  reducers: (create) => ({
    fetchUser: create.asyncThunk(
      async (_, thunkApi) => {
        const response = await fetch("/api/user");
        if (!response.ok) {
          throw new Error("Failed to fetch user data");
        }
        const userData = await response.json();
        console.log(userData);
        return userData;
      },
      {
        pending: (state) => {
          (state.loading = true), (state.error = null);
        },
        fulfilled: (state, action) => {
          state.loading = false;
          state.data = action.payload;
        },
        rejected: (state, action) => {
          state.loading = false;
          state.error = action.error.message;
        },
      }
    ),
  }),
});

export const { fetchUser } = userSlice.actions;
export default userSlice.reducer;

这是我的 api/用户路线：

import { connectDb } from "@dbConfig/db";
import User from "@models/UserModel";
import { getServerSession } from "next-auth";
import { NextResponse } from "next/server";

export async function GET(req, res) {
  const session = getServerSession(); //using my session data from NextAuth to get email to find user in mongodb

  try {
    const email = (await session).user.email; //I don't know why prettier formatted this line like this, the code breaks if I change it.

    connectDb();

    const user = await User.findOne({ email });
    console.log(user);

    return NextResponse.json({ message: "User found:", user }, { status: 201 });
  } catch (error) {
    console.log(error);
  }
}

调用工作完美，我正在从数据库中获取用户数据，并且当我转到 localhost:3000/api/user 时可以看到它。 问题是当我尝试使用 redux 工具包获取它，然后将我的用户状态设置为收到的数据时。 当我在浏览器中检查 redux 开发工具时，我可以看到数据，但它仅出现在数据选项卡下，而不是实际更新状态。我对如何前进感到茫然。任何帮助表示赞赏。

Answer 1

在完成此

data

操作之前，状态中不存在

fetchUser

属性，在这种情况下，reducer 案例将

state.data

属性设置为等于

action.payload

。我怀疑您想将

state.user

属性设置为操作负载中的

user

属性，例如

state.user = action.payload.user;

。

const initialState = {
  user: {
    _id: "",
    fname: "",
    lname: "",
    email: "",
    streetAddress: "",
    postalCode: "",
    city: "",
    county: "",
    country: "",
  },
  loading: false,
  error: null,
};

const userSlice = createSliceWithThunks({
  name: "user",
  initialState,
  reducers: (create) => ({
    fetchUser: create.asyncThunk(
      async (_, thunkApi) => {
        try {
          const response = await fetch("/api/user");
          const userData = await response.json();
          return userData;
        } catch(error) {
          return thunkApi.rejectWithValue(error);
        }
      },
      {
        pending: (state) => {
          state.loading = true;
          state.error = null;
        },
        fulfilled: (state, action) => {
          state.loading = false;
          state.user = action.payload.user; // <-- update user property
        },
        rejected: (state, action) => {
          state.loading = false;
          state.error = action.error.message;
        },
      }
    ),
  }),
});