From 9e3021c4287e75bea7011e7b40951e804424037f Mon Sep 17 00:00:00 2001
From: Victorio Berra <tory.berra@wustl.edu>
Date: Tue, 30 Oct 2018 14:59:16 -0500
Subject: [PATCH 1/2] Add empty list initalizers to help avoid NREs

---
 DataTables.Queryable/DataTablesAjaxPostModel.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/DataTables.Queryable/DataTablesAjaxPostModel.cs b/DataTables.Queryable/DataTablesAjaxPostModel.cs
index c22213f..2e6983a 100644
--- a/DataTables.Queryable/DataTablesAjaxPostModel.cs
+++ b/DataTables.Queryable/DataTablesAjaxPostModel.cs
@@ -16,6 +16,12 @@ namespace DataTables.Queryable
     /// </remarks>
     public class DataTablesAjaxPostModel
     {
+        public DataTablesAjaxPostModel()
+        {
+            Columns = new List<ColumnData>();
+            Order = new List<OrderData>();
+        }
+
         /// <summary>
         /// Draw counter. This is used by DataTables to ensure that the Ajax returns from 
         /// server-side processing requests are drawn in sequence by DataTables 

From f9385d802e2dfa5c9ca018723819dc1b3704943b Mon Sep 17 00:00:00 2001
From: Victorio Berra <tory.berra@wustl.edu>
Date: Tue, 30 Oct 2018 17:27:50 -0500
Subject: [PATCH 2/2] Added a custom exception type to make it easier to handle
 exceptions when the developer tries to filter on a name that does not exist.

---
 DataTables.Queryable/DataTables.Queryable.csproj  | 1 +
 DataTables.Queryable/DataTablesRequest.cs         | 6 +++---
 DataTables.Queryable/NoPropertyByNameException.cs | 9 +++++++++
 3 files changed, 13 insertions(+), 3 deletions(-)
 create mode 100644 DataTables.Queryable/NoPropertyByNameException.cs

diff --git a/DataTables.Queryable/DataTables.Queryable.csproj b/DataTables.Queryable/DataTables.Queryable.csproj
index f47ca87..d349d44 100644
--- a/DataTables.Queryable/DataTables.Queryable.csproj
+++ b/DataTables.Queryable/DataTables.Queryable.csproj
@@ -41,6 +41,7 @@
     <Compile Include="DataTablesQueryProvider.cs" />
     <Compile Include="DataTablesRequest.cs" />
     <Compile Include="ExpressionExtensions.cs" />
+    <Compile Include="NoPropertyByNameException.cs" />
     <Compile Include="PagedList.cs" />
     <Compile Include="PredicateBuilder.cs" />
     <Compile Include="QueryableExtensions.cs" />
diff --git a/DataTables.Queryable/DataTablesRequest.cs b/DataTables.Queryable/DataTablesRequest.cs
index a64d679..f2e6057 100644
--- a/DataTables.Queryable/DataTablesRequest.cs
+++ b/DataTables.Queryable/DataTablesRequest.cs
@@ -180,7 +180,7 @@ public DataTablesRequest(NameValueCollection query)
                     }
                     else
                     {
-                        throw new ArgumentException($"Could not find a property called \"{data}\" on type \"{type}\". Make sure you have specified correct value of \"columnDefs.data\" parameter in datatables options.");
+                        throw new NoPropertyByNameException($"Could not find a property called \"{data}\" on type \"{type}\". Make sure you have specified correct value of \"columnDefs.data\" parameter in datatables options.");
                     }
                 }
 
@@ -194,13 +194,13 @@ public DataTablesRequest(NameValueCollection query)
                     }
                     else
                     {
-                        throw new ArgumentException($"Could not find a property called \"{name}\" on type \"{type}\". Make sure you have specified correct value of \"columnDefs.name\" parameter in datatables options.");
+                        throw new NoPropertyByNameException($"Could not find a property called \"{name}\" on type \"{type}\". Make sure you have specified correct value of \"columnDefs.name\" parameter in datatables options.");
                     }
                 }
 
                 if (propertyName == null)
                 {
-                    throw new ArgumentException($"Unable to associate datatables column \"{colIndex}\" with model type \"{typeof(T)}\". There are no matching public property found. Make sure you specified valid identifiers for \"columnDefs.data\" and/or \"columnDefs.name\" parameters in datatables options for the column \"{colIndex}\".");
+                    throw new NoPropertyByNameException($"Unable to associate datatables column \"{colIndex}\" with model type \"{typeof(T)}\". There are no matching public property found. Make sure you specified valid identifiers for \"columnDefs.data\" and/or \"columnDefs.name\" parameters in datatables options for the column \"{colIndex}\".");
                 }
 
                 var column = new DataTablesColumn<T>()
diff --git a/DataTables.Queryable/NoPropertyByNameException.cs b/DataTables.Queryable/NoPropertyByNameException.cs
new file mode 100644
index 0000000..ce40089
--- /dev/null
+++ b/DataTables.Queryable/NoPropertyByNameException.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace DataTables.Queryable
+{
+    public class NoPropertyByNameException : Exception
+    {
+        public NoPropertyByNameException(string message) : base(message) { }
+    }
+}