рефакторинг

src/Common/Database/Database.java

@@ -1,4 +1,5 @@
 package Common.Database;
+import Common.Constants.Constants;
 import Common.Global;
 import Common.Utils.Utils;
 import Repository.RepositoryRefuseException;
@@ -226,7 +227,7 @@ public abstract class Database {
                 (O) (tables.get(class_in).Data.get(pk)) : null;
     }
     public <O extends iDBObject> O getById(Class<O> class_in, int pk) {
-        return getByPK(class_in, pk, Utils.Nan);
+        return getByPK(class_in, pk, Constants.Nan);
     }
     public <G, O extends DBObject, F extends DBObject> LinkedHashMap<G, F> getByFKAndGroupBy(O owner, Class<F> fk_class, String group_field, Class<G> group_class) {
         LinkedHashMap<G, F> res = new LinkedHashMap<>();