How to read JSON data which is coming from server and store in local variable in SAP UI5?

[Former Member]

Hello Experts,

I am not able to read the JSON data which is coming from server and I would like to store one value into local variable? It is working fine if I bind the same model to UI controller ,the data is displaying correctly.But I need store one value into local variable.

Here is my code:

var oModelData = new sap.ui.model.json.JSONModel();

    var root = window.location.protocol + '//' + window.location.host;

    var url = root + "/idmrest/v72alpha/entries/0";

    oModelData.loadData(url);

    this.getView().setModel(oModelData, "model1");

    var zkey = this.getView().getModel("model1").getProperty("/ENTRIES/MSKEYVALUE/VALUE");

and It is saying "undefined" and if I use:

var zkey = oModelData.getProperty("/ENTRIES/MSKEYVALUE/VALUE");

here also it is undefined

can any body please suggest me here? and also how do we get the array and loop it which is inside the JSON (model1)?

Regards,

Kiran

[former_member182372 · Accepted solution]

oModelData.attachRequestCompleted(function() {

var zkey = oModelData.getProperty("/ENTRIES/MSKEYVALUE/VALUE");

  });

[Former Member · Accepted solution]

Hello ,

Thanks for your help. Now I can get the value.But still I am not able to make avialable that variable out of method

attachRequestCompleted(). can you please let me know how can I make this variable global..

Regards,

Kiran

[former_member182372 · Accepted solution]

call loadData like

oModelData.loadData(url, null, false);

JSONModel.prototype.loadData = function(sURL, oParameters, bAsync, sType, bMerge, bCache, mHeaders){

[Former Member · Accepted solution]

Hello ,

Thanks.

can you please explain me bit more. how can I do this in my case?

var oModelData = new sap.ui.model.json.JSONModel();

    var root = window.location.protocol + '//' + window.location.host;

    var url = root + "/idmrest/v72alpha/entries/0";

    oModelData.loadData(url);

    this.getView().setModel(oModelData, "model1");

oModelData.attachRequestCompleted(function() {

var zkey = oModelData.getProperty("/ENTRIES/MSKEYVALUE/VALUE");

  });

Now I need to get Zkey as available globally..

regards,

Kiran

[former_member182372 · Accepted solution]

third param is asunc - whether call is performed sync or async. bydefault it is async. if you dont like attachRequestCompleted you can call  it as sync and wait till call is done

[Former Member · Accepted solution]

Hello Maskim,

Here is what I tried ,but still no luck..

    oModelData.loadData(url,null,false);

      var zkey;

    oModelData.attachRequestCompleted(function() {

    zkey = oModelData.getProperty("/ENTRIES/Z_MSKEY/VALUE");

    });

   alert(zkey);

Regards,

Kiran

[former_member182372 · Accepted solution]

for sync you dont need attachRequestCompleted

oModelData.loadData(url,null,false);

      var     zkey = oModelData.getProperty("/ENTRIES/Z_MSKEY/VALUE");

   alert(zkey);

[former_member182372 · Accepted solution]

really, dont use sync just because you cant implement call back method

[Former Member · Accepted solution]

Hello Maskim,

Thanks.it worked.

If I use call back methods ,the scope of returning json will becoming the problems,because I need perform some other extra calls to server and needs to retrieve the data .

can you suggest me what would be the best way?

Regards,

Kiran

[former_member182372 · Accepted solution]

use async and in attachRequestCompleted fire an event or use jQuery.Deferred so you will get notified once the data is loaded

like here

you can even do

1. this.IamWaitingForYou = $.Deferred();

and use it in controller's methods

[santhu_gowdaz]

var url = root + "/idmrest/v72alpha/entries/0";

oModelData.loadData(url);

var aData = oModel1.getProperty("/d/results");  //If it is having single data then,("/d"). Debug it you will come to know.

var zkey = aData.MSKEYVALUE;//for single data

for (var i = 0; i < aData.length; i++)

{

    console.log(aData[i].MSKEYVALUE);//for multiple data.

}

[former_member182862]

I believe that you need to wait for the response from the server. try this

oModelData.attachRequestCompleted(function() {

     this.getProperty("/ENTRIES/MSKEYVALUE/VALUE");

});

thanks

-D

[former_member182862]

can you put it in a global model? like this

oModelData.attachRequestCompleted(function() {

     var m = new sap.ui.model.json.JSONModel({

        zkey: this.getProperty("/ENTRIES/MSKEYVALUE/VALUE")

     });

     sap.ui.getCore().setModel(m, 'global');

});

In future, you can get it this way.

sap.ui.getCore().getModel('global').getProperty('/zkey');

-D