Schema Class throws exception after creating package

Question

I am using Schema class to retrieve metadata of object.

Controller :

getCustomObject : function(cmp, event, helper) {
   var action = cmp.get("c.getCustomObject");
   var objectName = component.get("v.objectName"); // objectName = 'Test__c' without namespace
   action.setParams({
        "jsonObject" : JSON.stringify(obj)
    });
    action.setCallback(this, function(response){
    var state = response.getState();
        if (state === "SUCCESS") {
            var result = response.getReturnValue();
            // something login
       }
    });
    $A.enqueueAction(action);
}

Apex class :

@AuraEnabled
public static void getCustomObject() {
   Map<String, Schema.SObjectField> objectFieldSetMap = Schema.getGlobalDescribe().get(objectName).getDescribe().fields.getMap();
}

This was working fine as I was passing the objectName from my lightning component. But when I tested this in Sandbox after creating managed package and tested it throws

NullPointerException

After searching little bit I found the objectName coming from lightning component is without Namespace.

But in my scratch org it doesnt work with namespace. Please ignore any typing mistake or let me know if something is missing or I am not clear.

What would be the feasible solution for this?

Answer 1

You can create a method to get the org namespace prefix. Create a custom label and add the namespace prefix value in that custom label. When installing the package, put the value as namespace prefix else "c". Call this method to get the namespace prefix

public class NamespaceClass {
    public static String getNameSpacePrefix(){
        return Label.NamespacePrefix != 'c'? Label.NamespacePrefix : '';
    }
}

@AuraEnabled
public static void getCustomObject() {
   Map<String, Schema.SObjectField> objectFieldSetMap = 
   Schema.getGlobalDescribe().get(NamespaceClass .getNameSpacePrefix()).getDescribe().fields.getMap();
}

Also, ensure to put the two underscore value in the custom label if you have a package. For ex: namespace prefix in the custom label will be either "test__" or "c"