Error in oDataModel READ method

Question

Hi Experts,
I am using read method in oDataModel. The code is below:
sap.ui.getCore().getModel().read("/E_EXCISE_DATA_SET", exData, null,true,
                                                         function(e){ alert("success"); },
                                                         function(oError){ alert("Insert Failure");  } );
It is throwing an error - "Uncaught TypeError: Object [object Array] has no method 'getPath' "
Actually I want to call the HTTP get method from the UI. In debugging mode I am getting above error. How to resolve this?
What are the parameters for read method I need to pass? Kindly provide the code example for the read method.
Thanks in advanced,
Regards,
Arindam Samanta.

Answer 1

Hi Arindam,
check once if you are getting object for sap.ui.getCore().getModel() (you should set model to the core before this code.) .
Here is the model defination :
var oDataModel=new sap.ui.model.odata.ODataModel("serviceUrl", true,"uName","Password");
and here is the read on that model and various paramaters:(This you can get in eclipse help)
oDataModel.read(sPath, oContext, oUrlParams, bAsync, fnSuccess, fnError);
Parameters: {string} sPath A string containing the path to the data which should be retrieved. The path is concatenated to the sServiceUrl which was specified in the model constructor.
                   {object} [oContext] If specified the sPath has to be is relative to the path given with the context.
                    {any[]} [oUrlParams] An map of url parameters which will be concatenated to the read url
                   {boolean} [bAsync] true for asynchronous requests. Default is true.
                    {function} [fnSuccess] a callback function which is called when the data has been successfully retrieved. The handler can have the following parameters: oData and response.
                   {function} [fnError] a callback function which is called when the request failed. The handler can have the parameter: oError which contains additional error information.
Ex :
Lets say you want to read the data from this service path :
http://<host>:<port>/sap/opu/odata/<service>/Employee('10000')
in that case you can define model as
var oDataModel=new sap.ui.model.odata.ODataModel("http://<host>:<port>/sap/opu/odata/<service>/", true,"uName","Password");
and read as
oDataModel.read("/Employee('10000')", null, null, false, function fnSuccess(oData){
alert("result :"oData);
},function fnError(response){
on success, fnSuccess will get fired and you should see resut : object alert message.
regards,
Vijay.