如何在 JSON 的值部分使用 Javascript 变量？

Question

var avg_temp = req.params.rating;
var destination = req.params.name;


var temp = { "results.name" : destination }; 


var wew =  {$set: {"results.$.rating" :avg_temp} }; 


mach.update(temp ,wew , function(err,jop){
                if(err)
                {
                    res.status(500);
                    res.send('Destination not found');
                }
                else
                {
                    res.status(202);
                    res.send('Rating is posted');
                }
            });

Sample document :

{
      "_id" :    ObjectId("56247581846ec164bb6be7bf"),
        "results" : [ 
        `enter code here`{
            "name" : "Mk.Mechanics",
            "ph" : NumberLong(9899991817),
            "error" : false,
            "lat" : 28.5833958899999980,
            "lon" : 77.1687398899999980,
            "rating" : 3,
            "add" : "1123, Nanak pura, Delhi, 110021, India",
            "local" : "Nanak pura",
            "city" : "Delhi",
            "contry" : "India"
        }, 
        {
            "name" : "Pahadi",
            "ph" : NumberLong(9876591817),
            "error" : false,
            "lat" : 28.6776553099999990,
            "lon" : 77.2616931799999950,
            "rating" : 3.5000000000000000,
            "add" : "plot-6 saranshpur, Shastri park,Delhi,110018, India",
            "local" : "saranshpur",
            "city" : "Delhi",
            "contry" : "India"
        }, 
        {
            "name" : "mirza",
            "ph" : 1.23123e+007,
            "error" : false,
            "lat" : 28.6775564800000000,
            "lon" : 77.2621437899999960,
            "rating" : 1,
            "add" : " plopur, Shastri park, Delhi,110099,India",
            "local" : "Shastri park",
            "city" : "Delhi",
            "contry" : "India"
        }
] }

Heading

When i use static value in destination and avg_temp (eg. "Pahadi" and 12 respectively) this works but in this case it does not

Request is a patch request which I am making to the Node server :

localhost:8000\api\machs?name=Pahadi&rating=1

Any idea How to access JavaScript object in json

Output : Destination Not Found (Eventhough i've put exact string values in name params)

Answer 1

just put a console.log(err); above res.status(500); . So that we can know what the error is from DB.

Answer 2

Ahh Silly Mistake , Changed req.params to req.query as the values were sent by the http request in query string ! Problem solved , Now the code works as it should . Thank you guys for participating though :)