lightningDataTableHelper.js

({
    getData : function(cmp) {
        var action = cmp.get('c.getContacts');
        var recordId=cmp.get('v.recordId');
        action.setParams({recordId:recordId});
        action.setCallback(this, $A.getCallback(function (response) {
            var state = response.getState();
            if (state === "SUCCESS") {
                //console.log(JSON.stringify(response.getReturnValue()));
                cmp.set('v.myData', response.getReturnValue());
                
            } else if (state === "ERROR") {
                var errors = response.getError();
                console.error(errors);
            }
        }));
        $A.enqueueAction(action);
    },
    onSave:function(cmp,event)
    {
        var editedRecords=cmp.find('contactDatatable').get("v.draftValues");
        console.log('editedRecords'+JSON.stringify(editedRecords));
        var action=cmp.get('c.updateContacts');
        action.setParams({contactList:editedRecords});
        action.setCallback(this,function(response)
                           {
                              var state=response.getState();
                               if(state='SUCCESS')
                               {
                                 //  console.log('success'+JSON.stringify(response.getReturnValue()));
                                   var toastEvent=$A.get("e.force:showToast");
                                   toastEvent.setParams({title:'Success Message',
                                                         message:'successfully Updated',
                                                         key:'info_alt',
                                                         type:'info',
                                                         mode:'pester'
                                                        });
                                   toastEvent.fire();
                                   
                               }
                               else 
                               {
                                   console.log(state);
                               }
                                   
                           });
        $A.enqueueAction(action);
    }
})