EF7 Notimplemented [WA]

Yavsc/Controllers/HomeController.cs

@@ -54,8 +54,33 @@ namespace Yavsc.Controllers
             ViewData["HasHaircutCommand"] = DbContext.HairCutQueries.Any
             (q=>q.ClientId == uid && q.Status < QueryStatus.Failed);
 
-            return View(DbContext.Activities.Where(a=>a.ParentCode==id && !a.Hidden).Include(a=>a.Forms).Include(a=>a.Children)
-            .OrderByDescending(a=>a.Rate));
+            if (id==null) {
+                // Workaround
+                // NotImplementedException: Remotion.Linq.Clauses.ResultOperators.ConcatResultOperator
+                //
+                // Use Concat()| whatever to do left outer join on ToArray() or ToList(), not on IQueryable
+
+                var legacy = DbContext.Activities
+                .Include(a=>a.Forms).Include(a=>a.Children)
+                .Where(a=> !a.Hidden)
+                .Where(a=> a.ParentCode==null).ToArray();
+                // OMG
+                var hiddenchildren = DbContext.Activities
+                .Include(a=>a.Forms).Include(a=>a.Children)
+                .Where(a=> a.Parent.Hidden && !a.Hidden).ToArray();
+
+                return View(legacy.Concat(hiddenchildren).OrderByDescending(a=>a.Rate));
+            }
+            else {
+                return View(DbContext.Activities
+                .Include(a=>a.Forms).Include(a=>a.Children)
+                .Where(a=>!a.Hidden)
+                .Where(a=> a.ParentCode==id).OrderByDescending(a=>a.Rate));
+
+            }
+
+
+
         }
         public IActionResult About()
         {