Question

事件集合中已经有一些文档，但是当我尝试注销“ eventId”字段时，它显示“未定义”。以下是代码：

var EventSchema = mongoose.Schema({
eventId: { type: Number, required: true,unique: true },
name: { type: String, required: true },
loc: { type: ObjectId },
quota: { type: Number }
});


var Event = mongoose.model('Event', EventSchema);

app.get('/test',function(req,res){   
        Event.find(function(err,result){
                if(err)
                        console.log("Not found");
            console.log("This is" + result.eventId);
            res.send(result);
        });

});

Answer 1

尝试：

var EventSchema = mongoose.Schema({
  eventId: { type: Number, required: true,unique: true },
  name: { type: String, required: true },
  loc: { type: ObjectId },
  quota: { type: Number }
});

var Event = mongoose.model('Event', EventSchema);

app.get('/test', async function(req,res){   
  const result = await Event.find();
  console.log("This is the result: " + result);
  res.send(result);
});

我认为您的问题是回调位于.find（）方法的过滤器对象位置。以下可能也可以：

var EventSchema = mongoose.Schema({
  eventId: { type: Number, required: true,unique: true },
  name: { type: String, required: true },
  loc: { type: ObjectId },
  quota: { type: Number }
});

var Event = mongoose.model('Event', EventSchema);

app.get('/test',function(req,res){   
  Event.find({}, function(err,result){
    if(err) console.log("Not found");
    console.log("This is" + result.eventId);
    res.send(result);
  });
});

无法访问猫鼬中的实例字段

1 个答案: