sqlite3，在node中使用，轻量级数据库

db/index.js:

var sqlite3 = require('sqlite3').verbose()
var db = new sqlite3.Database('my.db')

//执行sql语句
const runSql = async (sql) => {
  return new Promise(async (resolve, reject) => {
    db.run(sql, (err) => {
      resolve(err)
    })
  })
}

//查询
const queryPromise = async (sql) => {
  return new Promise(async (resolve, reject) => {
    db.all(sql, function (err, rows) {
      console.log(rows)
      if (err) {
        reject(err)
      } else {
        resolve(rows)
      }
    })
  })
}

module.exports = {
  runSql,
  queryPromise,
}

增删查改：

const axios = require('axios')
const { runSql, queryPromise } = require('../../db/index')
const { sendEmail } = require('../../utils/tools')

//搜索
const dataSearch = async (req, res) => {
  const { pageNum = 1, pageSize = 10 } = req.body
  const result = await queryPromise(
    `SELECT * FROM myLogs ORDER BY addtime DESC`
  )
  let list = [...result]

  const searchParams = req.body || {}
  delete searchParams.pageNum
  delete searchParams.pageSize

  list = list.filter((item) => {
    let flag = true
    for (let key in searchParams) {
      if (
        typeof item[key] === 'string' &&
        !item[key].includes(searchParams[key])
      ) {
        flag = false
      } else if (
        typeof item[key] === 'number' &&
        !(item[key] === searchParams[key])
      ) {
        flag = false
      }
    }
    return flag
  })

  const start = (pageNum - 1) * pageSize
  const end = start + pageSize * 1
  res.send({
    state: 1,
    data: {
      list: list.slice(start, end),
      totalCount: list.length,
      pageNum: pageNum - 0,
      pageSize: pageSize - 0,
    },
    message: '搜索成功',
  })
}

//调用阿里云服务器上的发送邮件的接口
const emailPost = (emailData) => {
  axios
    .post('http://39.97.238.175:81/api/log/email', {
      ...emailData
    })
    .then((res) => {
      console.log(`statusCode: ${res.statusCode}`)
      console.log(res)
    })
    .catch((error) => {
      console.error(error)
    })
}

//添加
const dataAdd = async (req, res) => {
  const { dataItem } = req.body
  const { path, username, errorTitle, detail } = dataItem
  const id = Date.now()
  const addtime = Date.now()
  const edittime = ''
  const browser = req.headers[`user-agent`]
  const status = '0'
  const err = await runSql(
    `INSERT INTO myLogs VALUES ('${id}', '${addtime}', '${edittime}', '${path}', '${username}', '${browser}', '${errorTitle}', '${detail}', '${status}')`
  )
  res.send({
    state: 1,
    data: dataItem,
    message: '添加成功',
  })
  //添加错误时调用发送邮件的接口
  emailPost({...dataItem, browser})
}

//发送邮件的接口
const dataEmail = async (req, res) => {
  const emailData = req.body
  await sendEmail({ ...emailData }).catch((err) => {
    console.log(err)
  })
  res.send({
    state: 1,
    data: emailData,
    message: '成功',
  })
}

//删除
const dataDelete = async (req, res) => {
  let { ids } = req.body
  console.log(ids)
  err = await runSql(`DELETE FROM myLogs WHERE id in (${ids.join(',')})`)
  res.send({
    state: 1,
    data: ids,
    message: '删除成功',
  })
}

//编辑
const dataEdit = async (req, res) => {
  let { id, dataItem } = req.body
  const { path, username } = dataItem
  const edittime = Date.now()
  err = await runSql(
    `UPDATE myLogs SET path='${path}', username='${username}', edittime='${edittime}' WHERE id=${id}`
  )
  res.send({
    state: 1,
    data: dataItem,
    message: '编辑成功',
  })
}

// 状态操作
const dataStatus = async (req, res) => {
  const { id, status } = req.body

  const edittime = Date.now()
  err = await runSql(
    `UPDATE myLogs SET edittime='${edittime}', status='${status}' WHERE id=${id}`
  )
  res.send({
    state: 1,
    data: status,
    message: '编辑成功',
  })
}

//创建表，销毁表，增删查改，练习
const dataAction = async (req, res) => {
  const { type } = req.body
  let result = []
  let err
  const id = Date.now()
  const addtime = Date.now()
  const edittime = '1'
  const path = 'a'
  const username = 'admin'
  const browser = 'chrome'
  const errorTitle = '1'
  const detail = '详情'
  const editId = '1628502771985'
  const status = '0' //0: 未解决 1：已解决

  if (type === 'create') {
    err = await runSql(
      `CREATE TABLE myLogs (id TEXT, addtime TEXT, edittime TEXT, path TEXT, username TEXT, browser TEXT, errorTitle TEXT, detail TEXT, status TEXT)`
    )
  } else if (type === 'insert') {
    err = await runSql(
      `INSERT INTO myLogs VALUES ('${id}', '${addtime}', '${edittime}', '${path}', '${username}', '${browser}', '${errorTitle}', '${detail}', '${status}')`
    )
  } else if (type === 'select') {
    result = await queryPromise(`SELECT * FROM myLogs`)
  } else if (type === 'update') {
    err = await runSql(`UPDATE myLogs SET edittime='666' WHERE id=${editId}`)
  } else if (type === 'delete') {
    err = await runSql(`DELETE FROM myLogs WHERE id=${editId}`)
  } else if (type === 'drop') {
    runSql('DROP TABLE myLogs')
  }
  //console.log(result)
  if (err) {
    res.send({
      state: 0,
      message: JSON.stringify(err),
    })
  } else {
    res.send({
      state: 1,
      data: result,
      message: '成功',
    })
  }
}

module.exports = {
  logSearch: dataSearch,
  logAdd: dataAdd,
  logEmail: dataEmail,
  logDelete: dataDelete,
  logEdit: dataEdit,
  logStatus: dataStatus,
  logAction: dataAction,
}