fixes

zero.Core/Database/ZeroDocumentConventionsBuilder.cs

@@ -39,7 +39,7 @@ namespace zero.Core.Database
     /// <inheritdoc />
     public void Run(DocumentConventions conventions)
     {
-      conventions.MaxNumberOfRequestsPerSession = 100;
+      conventions.MaxNumberOfRequestsPerSession = 1000;
       conventions.IdentityPartsSeparator = IdentityPartsSeparator;
       conventions.TransformTypeCollectionNameToDocumentIdPrefix = TransformTypeCollectionNameToDocumentIdPrefix;
       conventions.FindCollectionName = FindCollectionName;

zero.Core/Routing/AbtractRouteProvider.cs

@@ -62,6 +62,10 @@ namespace zero.Core.Routing
 
       foreach (T model in models)
       {
+        if (model == null)
+        {
+          continue;
+        }
         string routeId = GetRouteId(model, parameters);
         routeIds.Add(routeId);
         routeMap.TryAdd(routeId, model);

zero.Core/Routing/Routes.cs

@@ -106,7 +106,14 @@ namespace zero.Core.Routing
         return new();
       }
 
-      Type type = models.First().GetType();
+      T firstExistingModel = models.FirstOrDefault(x => x != null);
+
+      if (firstExistingModel == null)
+      {
+        return new();
+      }
+
+      Type type = firstExistingModel.GetType();
       IRouteProvider routeProvider = Providers.FirstOrDefault(x => x.AffectedTypes.Any(t => t.IsAssignableFrom(type)));
 
       if (routeProvider == null)