How to read data using AJAX call

[former_member583423]

Hi  All,

In this blog I am going to tell you how to read data through AJAX calls.

Imagine that you want to use the data from some other site to your app .

Suppose you want to show news feeds in your app or you want to access some internet oData service like Northwind in your app. So one of the solution to your need is AJAX call.

So in this blog I am going to discuss :

1.Read XML data using AJAX (News feeds on this site : http://zeenews.india.com/rss/world-news.xml)

2.Read Northwind oData using AJAX (oData on this site: http://services.odata.org/V2/Northwind/Northwind.svc/Customers)

 

1.Read XML data using AJAX

Step 1: Create destination for the site (Not absolute URL)



 

Step 2: Make the destination entry in neo-app.json

{

"path": "/zeenews",

"target": {

"type": "destination",

"name": "zeenews"

},

"description": "News Feedservice"

}

Step 3: AJAX call .

First two steps just bring the data at the same domain.In this step you are actually going to call the URL and fetch the data into the model

var oModel = new sap.ui.model.xml.XMLModel();

var that = this;



var aData = jQuery.ajax({

type: "GET",

contentType: "application/xml",

url: "/zeenews/rss/world-news.xml",

dataType: "xml",

async: false,

success: function(data, textStatus, jqXHR) {







;

oModel.setData(data);



alert("success to post");

}



});



this.getView().setModel(oModel);​

Now you have all the XML data  of the destination site in your default model .

You can access the data of any XML tag simply by using following code:

this.getView().getModel().oData.getElementsByTagName("<Tag Name>")

 

 

2..Read Northwind oData using AJAX

Yess, you can use the Northwind oData using AJAX call .

First two steps("Create destination for the site" and " Make the destination entry in neo-app.json") are similar for Northwind.

 

Step 1: Create destination for the site



 

Step 2 :  Make the destination entry in neo-app.json

 

{

"path": "/Northwind_New",

"target": {

"type": "destination",

"name": "Northwind_New"

},

"description": "wind connector"

}

 

Step 3: AJAX call.

I have used JSON model to access the Northwind oData.

onInit: function()

{

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

var that = this;

var aData = jQuery.ajax({

type: "GET",

contentType: "application/json",

url: "/Northwind_New/V2/Northwind/Northwind.svc/Customers",

dataType: "json",

async: false,

success: function(data, textStatus, jqXHR) {

oModel.setData(data);

alert("success to post");

}

});

this.getView().setModel(oModel);

}

In this method the whole oData will come now be set to your default model.

If you want to see the records, you can use the following line of code in debugger.

oModel.getProperty("/d/results");

I have then set the data to my table on View 🙂

<Table id="idProductsTable" headerText="Comapany Info" class="sapUiResponsiveMargin" width="auto" items="{/d/results}">



.........





</Table>

This is it..

Do let me know if you like the blog

Thank you

🙂

 

 

 

[AnkurBajpai]

Nice blog Raj.

Regards,

Ankur

[former_member583423]

Thanks Ankur

 

[CristianBabei]

Nice blog!

One question, this is usefull only when you deploy on your SCP, as you are using destinations, how  would you do, if you will deploy the app to your OnPremise gateway¿?

[former_member583423]

Hi,

Just try one thing , don't create destination instead of that write the complete url in "url" section

Like,

url:"https://example.com/abc.xml"

And make async true

Like,

async:true

 

 

Try this thing and do let me know

:)

[CristianBabei]

When trying this, I always have CORS problems...

[former_member583423]

 

	$.ajax({

			type: "POST",

			url: url,

			dataType: "json",

			crossDomain: true,

			data: JSON.stringify(myEventList),

			success: function(result) {

				

			},

			error: function(response) {

						}

		});

Try this and let me know

[yilmazozkn]

Hi rajvardhant , firstly thanks for this useful blog post.

I’m also taking same CORS problem like  devis134 .

Do you have any idea?

Code is here;

                  var url = "http://<URL>.com:<PORT>/api/startanalysis"; 

  

                    $.ajaxSetup({

				headers: {

					'Content-Type': 'application/json'

				}

			});



			jQuery.ajax({

				url: url,

				type: "POST",

				data: $.param({

					"InputMaterial": "1111",

					"SimilarityType": "R",

					"TOP": 5,

					"Id": id,

					"Parameters": [{

						"Parameter": "Merkmal4",

						"Weight": 100,

						"Knockout": false

					}]

				}),

				crossDomain: true,

				dataType: "json", 

				async: false,

				//contentType: "application/json",

				success: function (data) {

					debugger;

					MessageToast.show("Done");

				},

				error: function (e) {

					MessageToast.show("Server Send Error");

				}

			});

[former_member640803]

Great blog.

TIP: Always make destination to avoid CORS header issue.

[former_member687956]

Hi Rajvardhan,

Instead of creating a new model, I'm trying to set a property in my global model to store the fetched data. But the property remains empty. Can you suggest how to resolve it?

Here is the code:

var oDataGlobalModel = this.getOwnerComponent().getModel("oDataGlobal");

            var sUrl = "/Department_Service/rmg/departments";

            debugger;

            $.ajax({

            	type: "GET",

            	url: sUrl,

            	async: true,

            	dataType: "json",

            	contentType: "application/json; charset=utf-8",

            	error: function (err) {

					sap.m.MessageToast.show("Destination Failed");

				},

            	success: function(data, textStatus, jqXHR){

            		oDataGlobalModel.setProperty("/departmentData",data);

            		sap.m.MessageToast.show("Success to fetch department data");

            	}

            	

            });

            oDataGlobalModel.refresh();

[former_member583423]

Hi,

setProperty() method won't work with your odata model.

Please create one json model at global level and try to set it to that model.

Please replace your code with below code snippet  inside success call. I hope it will help.

var jsonModel  = new sapui.model.json.JSONModel();



jsonModel.setProperty("/departmentData",data);



sap.ui.getCore().setModel(jsonModel,"departmentModel");

This model will be created at global level.

And you can access the model using below statement

sap.ui.getCore().getModel("departmentModel");

 

I hope it will help.

 

Thanks

 

 

 

 

 

[former_member501093]

Hi Rajvardhan,

Thank you for your blog post.

I am using SAP BAS to generate my UI5 project using generators.

I don't have any neo-app.json file.

In such a case where do I define the destinations ? Is it manifest.json ?

Regards,

Sauranil

[juanforero5]

Hello, were you able to do the configuration in the manifest?

[RjainCap]

Hi Sauranil,

You can define the destination in xs-app.json file of your project.

[abhilashg1]

Hi Rajvardhan,

 

Can we create destinations in Eclipse Mar2.0?