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  • mongoose 5.0 链接数据库 代码保存

    const mongoose = require('mongoose');
    const dbSrc = 'mongodb://localhost/douban-trailer'
    
    mongoose.Promise = global.Promise;
    
    exports.connect = () => {
    
      let maxConnectTimes = 0; 
      
      return new Promise((resolve, reject) => {
    
    
    
        if (process.env.NODE_ENV != 'production') {
          mongoose.set('debug', true)
        }
    
        mongoose.connect(dbSrc)
    
        var db = mongoose.connection;
        //监听相关事件
        db.on('disconnected', () => {
          maxConnectTimes++;
          if(maxConnectTimes<5){
            mongoose.connect(dbSrc)
          }else{
            throw new Error('数据库无法连接!')
          }
        })
    
        db.on('error', err => {
          maxConnectTimes++;
          if(maxConnectTimes<5){
            mongoose.connect(dbSrc)
          }else{
            throw new Error('数据库无法连接!')
          }
        })
    
        db.once('open', () => {
          console.log('MongoDB Connected successfully')
          var schema = new mongoose.Schema({ name: 'string', size: 'string' });
          var Tank = mongoose.model('Tank', schema);
    
          const tank = new Tank({name:'测试数据',size:'210'})
    
          tank.save().then(()=>{
            console.log('存储正常')
          })
          
          resolve();
         
        
        })
    
      });
    }

    返回结果

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  • 原文地址:https://www.cnblogs.com/QQ-Monarch/p/8529969.html
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