Dynamics365 CRM UCI get all activities (subgrid refresh)

Activities.js

function getActivities(executionContext) {

    var formContext = executionContext.getFormContext();
    //get current contact id;
    var recordId = formContext.data.entity.getId();
    var ActivitiesSubGridControl = formContext.getControl("ActivitiesSubGrid");
    //recordId = recordId.replace("{", "").replace("}", "");
    recordId = recordId.slice(1, -1);
    var orConditionsList = [];
    var orConditionsFetchXml = "";
    var fetchXml = "";

    Xrm.WebApi.online.retrieveMultipleRecords("activityparty", "?$select=_activityid_value&$filter=_partyid_value eq " + recordId).then(
        function success(result) {
            for (var i = 0; i < result.entities.length; i++) {
                orConditionsList.push(result.entities[i]["_activityid_value"]);
            }

            for (var i = 0; i < orConditionsList.length; i++) {
                orConditionsFetchXml += '<value>' + orConditionsList[i] + '</value>'
                //console.log(orConditionsList[i]); 
            }

            if (orConditionsList.length != 0) {
                fetchXml = "<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='false'>" +
                    "  <entity name='activitypointer'>" +
                    "    <attribute name='subject' />" +
                    "    <attribute name='ownerid' />" +
                    "    <attribute name='prioritycode' />" +
                    "    <attribute name='regardingobjectid' />" +
                    "    <attribute name='activitytypecode' />" +
                    "    <attribute name='statecode' />" +
                    "    <attribute name='scheduledstart' />" +
                    "    <attribute name='scheduledend' />" +
                    "    <attribute name='activityid' />" +
                    "    <attribute name='instancetypecode' />" +
                    "    <attribute name='community' />" +
                    "    <attribute name='senton' />" +
                    "    <attribute name='statuscode' />" +
                    "    <order attribute='scheduledend' descending='false' />" +
                    "    <filter type='and'>" +
                    "      <condition attribute='isregularactivity' operator='eq' value='1' />" +
                    "      <condition attribute='activityid' operator='in'>" +
                    orConditionsFetchXml +
                    "      </condition>" +
                    "    </filter>" +
                    "  </entity>" +
                    "</fetch>"
                console.log(fetchXml);




                ActivitiesSubGridControl.setFilterXml(fetchXml);
                ActivitiesSubGridControl.refresh();



            } else {
                fetchXml = "<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='false'>" +
                    "  <entity name='activitypointer'>" +
                    "    <filter type='and'>" +
                    "      <condition attribute='statecode' operator='null'/>" +
                    "    </filter>" +
                    "  </entity>" +
                    "</fetch>";
                ActivitiesSubGridControl.setFilterXml(fetchXml);
                ActivitiesSubGridControl.refresh();

            }

        },
        function (error) {
            console.log(error.message);
            // handle error conditions
        }
    );


}