서버사이드렌더링 적용후 다이나믹 라우팅 할때 질문있습니다

안녕하세요 제로초님 !
page 폴더에 /post/[id].js 만들어서 다이나믹라우팅 적용시켰는데요.
[id].js 에 서버사이드렌더링 배운거 적용하고
post reducer에 singlePost state추가해서 dispatch 하면 데이터 받아오도록 하였습니다
근데 리스트컴포넌트에서 에서 <Link> 클릭하고 들어가면 singlePost 값이 null이 나오더라고요..
새로고침하면 데이터값이 들어와있습니다.

그래서 콘솔에 찍어보니 컴포넌트가 먼저 실행되고
다시렌더링 된후에 singlePost 값이 찍혀있었습니다

제로초님 노드버드사이트 확인해보니 다이나믹라우팅 적용하면
favicon부분이 로딩아이콘으로 변하면서 콘솔창이 새로고침되던데.. 제가 뭐 적용해야하는걸 놓친건지 계속 찾다가 질문글 올립니다

/post/[id],js

import React, { useState, useCallback } from "react"
import { useDispatch, useSelector } from "react-redux"
import { useRouter } from "next/router"
import Head from "next/head"
import axios from "axios"
import { END } from "redux-saga"

import { makeStyles } from "@material-ui/core/styles"
import { Grid, Avatar } from "@material-ui/core"
import Rating from "@material-ui/lab/Rating"
import { FavoriteBorder, Favorite } from "@material-ui/icons"
import red from "@material-ui/core/colors/red"

import Layout from "../../components/Layout"
import CommentForm from "../../components/CommentForm"
import CommentList from "../../components/CommentList"
import {
  LIKE_POST_REQUEST,
  LOAD_POST_REQUEST,
  UNLIKE_POST_REQUEST,
} from "../../reducers/post"
import PopularList from "../../components/PopularList"
import wrapper from "../../store/configureStore"
import { LOAD_USER_REQUEST } from "../../reducers/user"

const useStyles = makeStyles({
  root: {
    maxWidth: 1500,
    paddingLeft: "20rem",
    margin: "auto",
  },
})

const Post = () => {
  const dispatch = useDispatch()
  const router = useRouter()
  const classes = useStyles()

  const { me } = useSelector((state) => state.user)
  const { singlePost } = useSelector((state) => state.post)
  const { id } = router.query
  //const img = singlePost.Images[0].src

  //const Liked = singlePost.Likers.find((v) => v.id === me.id)
  const onUnLike = useCallback(() => {
    console.log("좋아요 취소")
    dispatch({
      type: UNLIKE_POST_REQUEST,
      data: { postId: parseInt(id), count: singlePost.Likers.length - 1 },
    })
  }, [])
  const onLike = useCallback(() => {
    console.log("좋아요")
    dispatch({
      type: LIKE_POST_REQUEST,
      data: { postId: parseInt(id), count: singlePost.Likers.length + 1 },
    })
  }, [])

  return (
    <Layout>
      {console.log("포스트", singlePost)}
      <Head>
        <title>님의 글</title>
      </Head>
      {/* <Grid container className={classes.root} spacing={3}>
        <Grid item xs={8}>
          <h2>{singlePost.title}</h2>
          <div>
            <Avatar alt="Remy Sharp" src="/static/images/avatar/1.jpg" />
            <span>id</span>
            <span>날짜</span>
            <Rating value={singlePost.rating} precision={0.1} readOnly />
          </div>
          <div>
            <img
              src={
                img.includes("https://") ? img : `http://localhost:3063/${img}`
              }
              alt={singlePost.title}
            />
            <p>{singlePost.content}</p>
          </div>
          <div>
            <button type="button">
              {Liked ? (
                <Favorite style={{ color: red[600] }} onClick={onUnLike} />
              ) : (
                <FavoriteBorder onClick={onLike} />
              )}
            </button>
            {singlePost.Likers.length}명이 좋아합니다
          </div>
          <CommentList currentPostId={id} comments={singlePost.Comments} />
          <CommentForm currentPostId={id} comments={singlePost.Comments} />
        </Grid>
        <Grid item xs={4}>
          <PopularList />
        </Grid>
      </Grid> */}
    </Layout>
  )
}

export const getServerSideProps = wrapper.getServerSideProps(
  async (context) => {
    const cookie = context.req ? context.req.headers.cookie : ""
    axios.defaults.headers.Cookie = ""
    if (context.req && cookie) {
      axios.defaults.headers.Cookie = cookie
    }
    context.store.dispatch({
      type: LOAD_USER_REQUEST,
    })
    context.store.dispatch({
      type: LOAD_POST_REQUEST,
      data: context.params.id,
    })
    context.store.dispatch(END)
    await context.store.sagaTask.toPromise()
    return { props: {} }
  },
)

export default Post

렌더링후

postlist 컴포넌트

/post/[id],js 콘솔창

인프런 커뮤니티 질문&답변