目标:在react前端进行有效的查询搜索。
尝试:
后端看起来像这样
//route: GET /shop
//note: get all the products on shop page
//access: public
router.get('/', async (req, res) => {
try {
let items
//sort by category
if(!req.query.category) {
items = await Product.find()
} else {
items = await Product.find({category: req.query.category})
}
//sort by price and letter
if(req.query.sortBy) {
let sort ={}
const sortByArray = req.query.sortBy.split(':')
sort[sortByArray[0]] =[sortByArray[1]]
items = await Product.find().sort(sort).exec()
}
res.json(items)
} catch (error) {
console.error(error.message)
res.status(500).send('Server error')
}
})
它可以在后端的服务器上运行,现在我有一个反应前端,并且将按钮与搜索查询(例如
)链接在一起<Link to="/shop?category=music" >MUSIC</Link>
我写了这样的动作
//get all the products
export const getProducts = () => async dispatch => {
try {
const res = await axios.get('/shop')
dispatch({
type: GET_PRODUCTS,
payload: res.data
})
} catch (error) {
dispatch({
type: PRODUCT_ERROR,
payload: { msg: error.response.statusText, status: error.response.status }
})
}
}
但是我没有像后端那样得到相同的响应。我认为这是因为React无法处理req.params,这就是为什么axios.get总是具有相同结果的原因。
如何正确连接两者?
答案 0 :(得分:1)
您在后端请求中缺少category
参数。您的操作应如下所示:
export const getProducts = () => async dispatch => {
try {
const res = await axios.get(`/shop${window.location.search}`) // This will add your current page url query params to API url so the API url would be: '/shop?category=music'
dispatch({
type: GET_PRODUCTS,
payload: res.data
})
} catch (error) {
dispatch({
type: PRODUCT_ERROR,
payload: { msg: error.response.statusText, status: error.response.status }
})
}
}