Question

这是来自MEAN堆栈网站的示例，我要求查询返回与输入“完全”匹配的参数。请查看附件中的图像以更好地了解问题。

有关此问题的任何提示吗？（我是初学者所以请详细说明一下） -TIA :)

  Input for the search from the browser 

  { body: { hp: 1, length: 1, diameter: 1, voltage: 1 } }

 // mongo schema 

  var CableSchema = new schema({
        body : {
            "hp": {
                type: Number
            },
            "length": {
                type: Number
            },
            "diameter": {                      
                type: Number
            },
            "voltage": {                        
                type: Number
            },
            "cost": {
                type: Number
            },

            "type": {
                type: String,
                default: "Cable"
            }
        }
    });

-----------------------------------------------------------
  // Result from Search Query obtained in console 

    [ { body:
         { type: 'Cable',
           cost: 1,
           voltage: 1,
           diameter: 1,
           length: 1,
           hp: 1 },
        __v: 0,
        _id: 5820246086d42a3c269ad9f2 },
      { body:
         { type: 'Cable',
           cost: 2,
           voltage: 2,
           diameter: 2,
           length: 2,
           hp: 2 },
        __v: 0,
        _id: 5820249086d42a3c269ad9f3 } ]`

Answer 1

键＆＃39; hp＆＃39;＆＃39;长度＆＃39;等等在有线模式的主体对象内。所以要参考＆＃39; hp＆＃39;使用＆＃39; body.hp＆＃39;在查询中

将您的查询更改为

var query = Cable.find({'body.hp' : parseInt(reqHp) , 'body.length' : parseInt(reqLen),
        'body.diameter' : parseInt(reqDia) ,'body.voltage' : parseInt(reqVol)})

Answer 2

混乱与任务有关 - 1人来自req身体，另一人来自＆＃39; 2body＆＃39;模式我需要使用1body.2body来获取数据。

＆＃13;

    var reqHP = req.body.body.hp;
    var reqLen = req.body.body.length;
    var reqDia = req.body.body.diameter;
    var reqVol = req.body.body.voltage;
    var reqCost = req.body.body.cost;

＆＃13;

mongodb搜索查询 - 返回所有结果（非匹配的）

2 个答案: