SAPUI5 oData.V2 How to invoke a function after everything in a batch request is done? - odata

Question

I have an issue while making an SAPUI5 odata V2 batch request :
var that = this;
var oServiceModel = that.getModel("oServiceModel");
odataMod = this.getModel("Service");
odataMod.setUseBatch(true);
var aData = oServiceModel.getData();
var stupidService = _.filter(aData, function (ae) {
return ae.Info === "-N/A";
});
var i = 0 ;
_.forEach(stupidService, function (sap) {
oGlobalBusyDialog.setText("Deleting service :" + sap.ObjectID);
oGlobalBusyDialog.setTitle("Deleting Service");
oGlobalBusyDialog.open();
that.removeService(sap).then(function () {
if (i === 615) {
oGlobalBusyDialog.close();
}
}).catch(function () {});
});
my Delete function is like this:
removeService: function (service) {
var that = this;
return new Promise(
function (resolve, reject) {
odataMod.remove('/ProjectTaskServiceCollection(\'' + service.ObjectID + '\')/', {
success: function (oData) {
resolve(oData);
},
error: function (oResult) {
that.handleError(oResult);
oGlobalBusyDialog.close();
reject(oResult);
}
});
});
What's happening ,is that if I'm trying to delete 500 entry, and if 200 entry cannot be deleted, the error message gets displayed 200 times
How to make it in a way to only display the error message once ?
Also, I want to turn off the batch request once everything is done odataMod.setUseBatch(false); how to do it ?
*EDIT: *
I've manage to do :
var aDeffGroup = odataMod.getDeferredGroups();
//add your deffered group
aDeffGroup.push("deletionGroup");
for (var s = 0; s < 5; s++) {
odataMod.remove('/ProjectTaskServiceCollection(\'' + stupidService[s].ObjectID + '\')/', {
//pass groupid to remove method.
groupId: "deletionGroup"
});
}
odataMod.submitChanges({
// your deffered group id
groupId: "deletionGroup",
success: function() {
//Get message model data from Core and it contains all errors
// Use this data to show in dialog or in a popover or set this to your local model see below code
var aErrorData = sap.ui.getCore().getMessageManager().getMessageModel();
console.log(aErrorData);
}
});
yet stills my console.log(aErrorData); still prints multiple error message

Answer 1

Instead of doing individual deletion odata calls. Add these all remove methods in a single group, then call odatamod.submitChanges() method.
Example:
//get all deffered groups
var aDeffGroup = odataMod.getDeferredGroups();
//add your deffered group
aDeffGroup.push("deletionGroup");
//set it back again to odatamodel
odataMod.setDeferredGroups(aDeffGroup);
odataMod.remove('/ProjectTaskServiceCollection(\'' + service.ObjectID + '\')/', {
//pass groupid to remove method.
groupId: "deletionGroup"});
odataMod.submitChanges({
// your deffered group id
groupId:"deletionGroup",
success: function() {
//Get message model data from Core and it contains all errors
// Use this data to show in dialog or in a popover or set this to your local model see below code
var aErrorData = sap.ui.getCore().getMessageManager().getMessageModel();
});