Hi Developer Community ,
I have been working on a task in my project , i will share the ocde of component , js and apex function .
My scenario is , i have a standard object :OPPORTUNITY and
Custom object: competition__c
in my opportunity there is a custom field called “Main_Competitor” (text field ) and in my competition there is a field called “Competitor” (look up field)

i have created a custom aura component and displayed in opportunity record page


in this above image u can see custom field : Main Competitor in details area,
on the right side u can see PRIMARY COMPETITION look up field (i have created a custom look up field )
in this primary competition , if i click on search , then it will show the list of Competitions ,if i select one of the competition name from them and click on set as primary , then this value is to be set a sprimary competition and in this particular selected competition i need to take value of competitor and assign that value to Main competitor in oppoertunity
i have already created all the necesaary requirements , but value is not updating , i think error is in apex code , i will share the code , plz check and let me know how to solve this

 

Competition.cmp:

<aura:component controller="oppcompquery" implements=" .......">
     <aura:attribute name="selectedId" type="String" />
         <aura:attribute name="competitionlist" type="String" />
<c:lookupField 
                    objectAPIName="Competition__c" 
                    label="PRIMARY COMPETITION"
                    returnFields="['Name']" 
                    queryFields="['Name']"
                    selectedId="{!v.selectedId}"
                    />
    <lightning:button label="set as primary" onclick="{!c.request1}" variant="brand" name="name2" class="slds-m-right_small"/>


controller.JS:

request1: function(component, event, helper) {
        var recId = component.get("v.selectedId");
        alert('hi');
        var action = component.get("c.fetchCompetitions");
        action.setParams({
            "recordId": component.get("v.recordId"),
            "recId": recId
        }); // Create a callback that is executed after 
        action.setCallback(this, function(response) {
                var state = response.getState();
                if (state === "SUCCESS") { // Alert the user with the value returned 
                    // from the server 
                    alert("From server: " + response.getReturnValue());
                    // You would typically fire a event here to trigger 
                    // client-side notification that the server-side 
                    // action is complete 
                } else if (state === "INCOMPLETE") {
                    // do something 
                } else if (state === "ERROR") {
                    var errors = response.getError();
                    if (errors) {
                        if (errors[0] && errors[0].message) {
                            console.log("Error message: " + errors[0].message);
                        }
                    } else {
                        console.log("Unknown error");
                    }
                }
            });
                $A.enqueueAction(action);
        }



apex class:

 @AuraEnabled
    public static void fetchCompetitions(String recordId, String recId){
                  System.debug('hi');
                   system.debug('recordId' +recordId);
                    system.debug('recId' +recId);
        List<Opportunity> opp=new List<Opportunity>();
        Opportunity o = [select id,Name,MainCompetitors__c from Opportunity where id=:recordId];
        List<Competitor__c> cmptList=[select id,Name  from Competitor__c where id=:recId];
        for(Competitor__c comp : cmptList){
           Opportunity opList = new Opportunity();    
           opList.MainCompetitors__c = comp.Name;        
            opp.add(opList);
        }
       update opp; 
        system.debug('opp' +opp);

    }

please help me with solution