如何使用本地存储单独设置评级

Question

好吧，正如你所知，我正在构建一个食谱应用程序，在每个食谱详细信息页面中，我可以对食谱进行评分。。。但现在的问题是，当我现在对一个食谱进行评分时，对所有其他食谱也设置了相同的评分。知道怎么解决吗？记住任何建议。。。非常感谢：(

Details.js

import { useParams } from 'react-router-dom';
import './Details.css';
import React, { useEffect, useState } from 'react';
import axios from 'axios';
import Image from './vitaminDfood-1132105308-770x553.jpg';
import {Link} from 'react-router-dom'
import ReactStars from 'react-rating-stars-component'
import { RecipeContext } from './RecipeContext';
import { useContext } from 'react';
function Details() {
const [details, setDetails] = useState([]);
const { recipeId } = useParams();
const{recipes,setRecipes}=useContext(RecipeContext)
const initialRatings = JSON.parse(localStorage.getItem("rating") || "[]");
const[rating,setRating]=useState(initialRatings)
useEffect(() => {
axios
.get(`https://cookbook.ack.ee/api/v1/recipes/${recipeId}`)
.then((res) => setDetails(res.data));

});
useEffect(() => {
localStorage.setItem("rating", JSON.stringify(rating));
}, [rating])


const ratingChanged = (newRating) => {

var rate={
score:newRating

}
setRating(newRating)
axios.post(`https://cookbook.ack.ee/api/v1/recipes/${recipeId}/ratings`,rate)
.then((res) => {
console.log(res.data) 
setRecipes(recipes)

})

};
return (
<>
<div className="details">
<div className="food-photo">
<img src={Image} alt="" />
<Link to="/"> <i className="fas fa-arrow-left arrow"></i></Link>   
<h1>{details.name}</h1>
</div>
<div className="star-line">

{new Array(rating).fill(null).map(() => (
<i className="fas fa-star stari"/>
))}

<p className="duration"><i className="far fa-clock"></i>{details.duration}<span>min.</span></p>
</div>
<p className="info">{details.info}</p>
<h1 className="ingredience">Ingredience</h1>
<div className="ing">{details.ingredients}</div>
<h1 className="ingredience">Příprava</h1>
<p className="description">{details.description}</p>
</div>
<div className="stars">
<ReactStars
classNames="star"
size={48}
onChange={ratingChanged}
count={5}
value={1}
edit
/>
</div>
</>
);
}
export default Details;

Answer 1

您有两个选项：

• 为每个配方存储不同的localStorage密钥
• 只要有一个大的"；评级"；键入localStorage并使其成为您的recipeId中的一个对象

我认为第一个选项是最简单的，可以通过以下小修改来完成：

const initialRatings = JSON.parse(localStorage.getItem(`ratings-${recipeId}`) || "[]");
useEffect(() => {
localStorage.setItem(`ratings-${recipeId}`, JSON.stringify(rating));
}, [rating, recipeId])