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Мария's questions

Martin Hope
Мария
Asked: 2024-01-28 20:29:30 +0800 CST
  • 5

我发现了同样的问题https://stackoverflow.com/questions/58831178/minlength-validator-not-working-in-mongoose，但对我来说一切都很好，但验证器仍然无法工作。Note.js 文件：

const mongoose = require('mongoose')
const uniqueValidator = require('mongoose-unique-validator');

mongoose.set('strictQuery', false)

const url = process.env.MONGODB_URI

console.log('connecting to', url)

mongoose.connect(url)

  .then(result => {
    console.log('connected to MongoDB')
  })
  .catch((error) => {
    console.log('error connecting to MongoDB:', error.message)
  })

const noteSchema = new mongoose.Schema({
  content: {
    type: String,
    minlength: 5,
    required: true
  },
  important: Boolean
})
mySchema.plugin(uniqueValidator);

noteSchema.set('toJSON', {
  transform: (document, returnedObject) => {
    returnedObject.id = returnedObject._id.toString()
    delete returnedObject._id
    delete returnedObject.__v
  }
})

module.exports = mongoose.model('Note', noteSchema)
Index.js 片段：

app.post('/api/notes', (request, response, next) => {
  const body = request.body

  const note = new Note({
    content: body.content,
    important: body.important || false,
  })
  note.save()
    .then(savedNote => {
      response.json(savedNote)
    })
    .catch(error => next(error))
})

app.put('/api/notes/:id', (request, response, next) => {
  const {
    content,
    important
  } = request.body

  Note.findByIdAndUpdate(
      request.params.id, {
        content,
        important
      }, {
        new: true,
        runValidators: true,
        context: 'query'
      }
    )
    .then(updatedNote => {
      response.json(updatedNote)
    })
    .catch(error => next(error))
})

валидация
Martin Hope
Мария
Asked: 2024-01-01 21:42:54 +0800 CST
  • 5

当我单击按钮时，我想获取有关特定国家/地区的信息。请求发送成功，请求结果存储在数组中（第6行）。但由于某种原因，在 console.log（第 19 行）中，我得到一个空数组，并且信息未显示在屏幕上。控制台中没有错误。如果我在搜索栏中写下整个国家/地区名称，那么有关该国家/地区的信息就会显示在屏幕上。我究竟做错了什么？

import { useState } from 'react'
import Filter from './Components/Filter'
import axios from 'axios'

const ShowCountries = ({countries}) => {
  const[state, setState] = useState([])

  const capital = state.find(arr => arr[0] === 'capital')
  const area = state.find(arr => arr[0] === 'area')
  const languages = state.find(arr => arr[0] === 'languages')
  const flags = state.find(arr => arr[0] === 'flags')

    if(countries.length === 0) return <p>Loading...</p>

    const countryInfo = (country) => {
      const baseUrlItem = `https://studies.cs.helsinki.fi/restcountries/api/name/${country}`
      axios.get(baseUrlItem).then(response => {
        setState(Object.entries(response.data))
        console.log(state)
      }
        )  
        if(state.length>0)
      return <div>
         <h1>{country}</h1>
         <p>{capital[0]} {capital[1]}</p>
         <p>{area[0]} {area[1]}</p>
         <p>{languages[0]} :</p>
         <ul>
           {Object.values(languages[1]).map(i => <li key={i}>{i}</li>)}
         </ul>  
         <img src={flags[1]['png']}/>
       </div>   
    }

    if(countries.length === 1) return countryInfo(countries)

    if(countries.length > 10) return 'Too many matches, specify another filter'

    if(countries.length > 1 && countries.length < 10) {
       return countries.map((country) => <div key={country}>
       <b>{country}</b>
       <button onClick={() => countryInfo(country) }>show</button><br></br>
     </div>)
    }
  }

const App = () => {
  const [countries, setCountries] = useState([]) 
  const [findCountrieValue, setFindCountrieValue] = useState('')

  const baseUrl = 'https://studies.cs.helsinki.fi/restcountries/api/all'

  const findCountrie = (event) => {
    setFindCountrieValue(event.target.value)

    axios.get(baseUrl).then(response =>
      setCountries(response.data
      .map(c => c.name.common).filter(c => c.toUpperCase()
  .includes(findCountrieValue.toUpperCase()))))
  }
    
  return (
    <div>
      <Filter find={findCountrie} value={findCountrieValue}/>      
      <ShowCountries countries={countries} setCountries={setCountries}/>
    </div>
  )
}
export default App

javascript