Opportunity records not displaying in list using Aura Components

Hi Friends,

I am trying to display opportunity record in the list based on the user entered input. below is my code. Kindly help me where i did wrong.

1) MyOpportunityListComponent.cmp :    *********************************    <aura:component controller ="MyOpportunityListController" implements="flexipage:availableForAllPageTypes">    <!-- Declaring client-side attributes to be used in component -->    <aura:attribute name="lstOpportunity" type="Opportunity[]" />    <aura:attribute name="columnsToDisplay" type="List" />    <aura:attribute name= "searchKeyword" type="String"/>   <!-- Display message on  the page-->    <aura:attribute name= "newMessage" type="String" Default="Hello there!"/>        <!-- Method to be called on component initialization-->    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>     <h2>{!v.newMessage}</h2>     <lightning:card iconName="standard:opportunity" title="Opportunity List">     <!-- Search box-->    <lightning:layout>         <lightning:layoutItem size="3" padding="around-small">              <lightning:input aura:id="searchField"                           label="Opportunity Name"                           value="{!v.searchKeyword}"                           placeholder="Search Opportunities"                           onchange="{!c.searchOpportunities}"/>         </lightning:layoutItem>    </lightning:layout>     <!-- Opportunity list goes here-->    <lightning:datatable data="{!v.lstOpportunity}"         columns="{!v.columnsToDisplay}"         KeyField="Id"         hideCheckboxColumn="true" />          </lightning:card> </aura:component>    2) MyOpportunityListComponentController.js :    *************************************** ({    //Method to be called on component initialization         doInit: function(component, event, helper){         helper.fetchOppHelper(null, component); },     // Method to perform search on Opportunities    searchOpportunities: function(component, event, helper){      var searchValue = component.find("searchField").get("v.value");        console.log("User entered - ",searchValue);      helper.fetchOppHelper(searchValue, component); } })   3) MyOpportunityListComponentHelper.js :    *********************************** ({     //Helper method to fetch opportunity information from controller     fetchOppHelper: function(searchVal, component){        component.set("v.columnsToDisplay",[        { label: "Opportunity Name", fieldName: "Name", type: "text"},        { label: "Account Name", fieldName: "Account_Name__c", type: "text" },        { label: "Close Date", fieldName: "CloseDate", type: "date"},        { label: "Amount", fieldName:"Amount", type: "currency",cellAttribute: {alignment:"Right"}}    ]);     // Creating the action     var action = component.get("c.fetchOpportunity");    action.setParams({"searchKeyWord" : searchVal                     }); // If we pass more parameter by using comma i.e. "param2":searVal,"param3" :amtVal etc..    // Calling server side Method       action.setCallback(this, function(response){          var state = response.getState();          if (state === "SUCCESS"){               debugger;               component.set("v.lstOpportunity", response.getReturnValue());          }else{                 alert("An error occurred while fetching the data");               }    });    $A.enqueueAction(action); }  })  4) MyOpportunityListController.apxc :    *********************************     public class MyOpportunityListController{     // Get the list of opportunities based on search value   @AuraEnabled   public static List<Opportunity> fetchOpportunity(String searchKeyWord){       List<Opportunity> returnList = new List<Opportunity>();     // If search value is null then return all opps.Else search accorgingly     String searchKey = String.isBlank(searchKeyWord) ? '%%' : searchKeyword + '%';     returnList = [SELECT Id, Name, Account_Name__c,CloseDate,Amount FROM Opportunity                          WHERE Name Like :searchKey LIMIT 15];        return returnList; } }  5) MyAuraApplication.app :    ********************** <aura:application extends="force:slds">  <!-- Include MyOpportunityComponent component inside application. Here newMessage is passing parameter Parent to Child. This newMessage is optional if required pass otherwise no need newMessage-->   <c:MyOpportunityListComponent newMessage="This is a new message"/> </aura:application>

Thank you very much

Regards,

Srinivas