Generate Array with multiple objects

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Generate Array with multiple objects

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#1 by (3 votes)

1

I am trying to generate an Array with structure of objects inside with the following structure:

var valores = [{ name: 'MongoDB', type: 'float', value: 25,{ name: 'MongoDB', type: 'float', value: 5 },{ name: 'MongoDB', type: 'float', value: 2 }];

The following structure comes to my Rest API:

{
  "subscriptionId" : "5a268a598dc68904bbc7b3cf",
  "originator" : "localhost",
  "contextResponses" : [
  {
    "contextElement" : {
      "type" : "Temperatura",
      "isPattern" : "false",
      "id" : "S_Temp001",
      "attributes" : [
        {
          "name" : "Tem_int",
          "type" : "float",
          "value" : 2,
          "metadatas" : [
            {
              "name" : "accuracy",
              "type" : "Float",
              "value": 2              }
          ]
        },
        {
          "name" : "Tem_out",
          "type" : "Integer",
          "value" : 1,
          "metadatas" : [
            {
              "name" : "Timestap",
              "type" : "Integer",
              "value": 33              }
          ]
        }
      ]
    },
    "statusCode" : {
      "code" : "200",
      "reasonPhrase" : "OK"
    }
  }
  ]
  }

I have to process this data in my Back-end to generate the structure already commented above.

The way I am trying to generate my Array is as follows:

    var params = req.body;
     var tmp2 = [];
     for (var i = 0; i < params.contextResponses.length; i++) {
       for (var j = 0; j < params.contextResponses[i].contextElement.attributes.length; j++) {
         for (var k = 0; k < params.contextResponses[i].contextElement.attributes[j].metadatas.length; k++) {
           //console.log("nuevo log antes de petar: " + params["contextResponses"][i].contextElement.attributes[j].metadatas[k].value);

           tmp2.push('{' + //paramsheadersFiware_Service,
params.contextResponses[i].contextElement.attributes[j].name,
                    params.contextResponses[i].contextElement.attributes[j].type,
                    params.contextResponses[i].contextElement.attributes[j].value

                    + '}');
         }
       }
   }
   console.log("tmp2 --> ",tmp2);

Going through the structure and then doing a push to the new array.

The answer I get is the following:

[ '{Tem_int', 'float', '2}', '{Tem_out', 'Integer', '1}' ]

As you can see the format is not correct, I need the labels before the values I tried concatenating before the Push but it does not look good and the '' are wrong put should go inside {''} How can I solve this problem?

The objective is to save multiple documents in MongoDB according to the initial format that I have commented.

I honestly do not know if there is any better way to save in MongoDB, but the idea is to save my Array of objects and each object is a document.

javascript

asked by Manolait 23.04.2018 в 13:38

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1 answer

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score 3 · Accepted Answer

It seems to me that, if you want your array to be of objects, you must create the elements like that, objects . You are adding them as string .

In this way, in the part of your code where you add these elements, you could try something like this:

   var obj = {
      name : params.contextResponses[i].contextElement.attributes[j].name, 
      type: params.contextResponses[i].contextElement.attributes[j].type,
      value: params.contextResponses[i].contextElement.attributes[j].value 
   };
   tmp2.push(obj);

By the way, and only as a suggestion, every time you enter a for , you could assign the element to be traversed to a variable (local to the cycle) with a shorter name, hehehe, so you do not get so saturated code ^^ (you can also use foreach , which allows you to do what same).