Hi All,

Trying to display a list of records in the related list for the custom object using lightning component.
I am getting the custom object Id and displaying all the cases related to that object.
But I m not able to display all record in a proper format and also on click of casenumber link should navigate to sobject details page.
App:
<aura:application extends = "force:slds" >
    <aura:attribute name="sessId"  type="String"   access="public" />
    <c:CaseRelatedListComponent sessId="{!v.sessId}" />
</aura:application>
Component:
<aura:component controller = "CaseRelatedListApex" >
    <aura:attribute name="sessId" type="string"/>
    <aura:attribute name="cases" type="Case[]"/>
    <aura:handler name="init" value="{!this}" action="{!c.check}" />
   <!-- <aura:attribute name="Cases" type="list"/>-->
    <aura:attribute name="recordId" type="String" />
    <aura:handler event="c:CaseRelatedListEvent" action="{!c.handleCSDetailsEvent}" />
    <div class="slds-col slds-col--padded slds-p-top--large">
 
  

  <!-- BOXED AREA -->
  <fieldset class="slds-box slds-theme--default slds-container--small">

    <legend id="Login form" class="slds-text-heading--small 
      slds-p-vertical--medium">
      
    </legend>

    
    <form class="slds-form--stacked">
       <aura:iteration items="{!v.cases}" var="ocas">
       <li>
       <!--javascript:void(0)-->
        <a href="javascript:void(0)" onclick="{!c.handleClick}">

            <ui:outputText value="{!ocas.CaseNumber}" /><br/>
           </a>
           
        <label class="slds-form-element__label" for="Name">Case Status</label>
        <div class="slds-float_right">
            <ui:outputText value="{!ocas.Status}"/>    <br/><br/>
         </div>
                              
           
         <label class="slds-form-element__label" for="Name">Subject</label>
        <div class="slds-float_right">
            <ui:outputText value="{!ocas.Subject}"/><br/>    
         </div>
           
           </li>
        </aura:iteration>
        
      
    </form>
        
      </fieldset>
        </div>
    </div>
</aura:component>
Javascript:
({
    check : function(component, event, helper){
        console.log('inside controller');
        helper.getCases(component,event,helper);
    }
    ,
    
    handleClick : function(component,event,helper){
        helper.navigateTorecordDetails(component,event);
    }
})
Helper:
({
    getCases : function(Component,event,helper) {
        var action= Component.get("c.getObject");
        var sessId = Component.get("v.sessId");
        action.setParams({
            "sessId" :sessId
            
        });
        action.setCallback(this,function(response){
            var state=response.getState();
                       
            if (Component.isValid() && state === "SUCCESS") {               
                alert('Cases');
                Component.set("v.cases",response.getReturnValue());
            }
        });
        $A.enqueueAction(action);
    },
    navigateTorecordDetails :function(Component,event,helper){
        var navEvt = $A.get("e.force:navigateToSObject");
        navEvt.setParams({
            "recordId": Component.get("v.recordId")
        });

        navEvt.fire();
    },
    
})

Apex:

@AuraEnabled
    public static List<Case> getObject(string  sessId){
        LIST< session__c > objsessList = new LIST< session__c >();
        LIST< Case > objCaseList = new LIST< Case >();
             
        
             if(sessId!=null)
        {
           objCaseList =[select id,subject,session_ID__c,CaseNumber,Status from case where session_ID__c =:sessId  limit 4];
            //return  objCaseList;       
           
        }
         return  objCaseList;
        }
       
        

}
When I click on CaseNumber it shows error as 
Action failed: c:CaseRelatedListComponent$controller$handleClick [Cannot read property 'setParams' of undefined] Failing descriptor: {c:CaseRelatedListComponent$controller$handleClick}

Do I need to create the event for this? How to pass the recordId to display the case details?
Pls, help me to fix this code.
Thanks,
Sirisha