Issue_21: Added SqliteForeignKeyIndexConvention.

Author: msallin

SQLite.CodeFirst/Convention/SqliteForeignKeyIndexConvention.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Data.Entity.Core.Metadata.Edm;
+using System.Data.Entity.Infrastructure;
+using System.Data.Entity.ModelConfiguration.Conventions;
+
+namespace SQLite.CodeFirst.Convention
+{
+    public class SqliteForeignKeyIndexConvention : IStoreModelConvention<AssociationType>
+    {
+        public virtual void Apply(AssociationType item, DbModel model)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+            if (model == null)
+            {
+                throw new ArgumentNullException("model");
+            }
+            if (item.Constraint == null)
+            {
+                return;
+            }
+        }
+    }
+}

SQLite.CodeFirst/SQLite.CodeFirst.csproj

@@ -77,6 +77,7 @@
     <Compile Include="Builder\ForeignKeyStatementBuilder.cs" />
     <Compile Include="Builder\CreateDatabaseStatementBuilder.cs" />
     <Compile Include="Builder\PrimaryKeyStatementBuilder.cs" />
+    <Compile Include="Convention\SqliteForeignKeyIndexConvention.cs" />
     <Compile Include="Extensions\EntityTypeExtension.cs" />
     <Compile Include="SqliteCreateDatabaseIfNotExists.cs" />
     <Compile Include="SqliteDropCreateDatabaseAlways.cs" />