Return error when calling function does not exist

persist.go

@@ -58,7 +58,7 @@ type InitProps struct {
 // Init runs on boot, reads system_collections from structful and registers them. No changes after boot are going to be applied.
 func Init(props *InitProps) {
 	var persistProps PersistProps
-	commons.CopyToStruct(props, &persistProps)
+	commons.StructToStruct(props, &persistProps)
 	persist = NewPersist(&persistProps)
 
 	sysDb = props.MongoSysDb
@@ -125,7 +125,9 @@ func Orig() *Persist {
 	return persistOriginal
 }
 
-func Call(p any, name string, args... any) []reflect.Value {
+var ErrCall error = errors.New("failed to call")
+
+func Call(p any, name string, args... any) ([]reflect.Value, error) {
 	v := reflect.ValueOf(p)
 
 	// 1. Make sure it's the right type
@@ -138,15 +140,21 @@ func Call(p any, name string, args... any) []reflect.Value {
 
 	// 3. Validate
 	if !fn.IsValid() {
-		log.Fatalf("Failed to find %s field", name)
+		log.Printf("Failed to find %s field", name)
+
+		return nil, ErrCall
 	}
 
 	if fn.Kind() != reflect.Func {
-		log.Fatalf("%s is not a function", name)
+		log.Printf("%s is not a function", name)
+
+		return nil, ErrCall
 	}
 
 	if fn.IsNil() {
-		log.Fatalf("%s is nil", name)
+		log.Printf("%s is nil", name)
+
+		return nil, ErrCall
 	}
 
 	// 4. Prepare arguments
@@ -157,7 +165,7 @@ func Call(p any, name string, args... any) []reflect.Value {
   }
 
 	// 5. Call and return results
-	return fn.Call(vArgs)
+	return fn.Call(vArgs), nil
 }
 
 const SAVE_USER_DATA = `