From 4a32977e35bb494da8dec1327db544f790374b8b Mon Sep 17 00:00:00 2001
From: Sean Fuhrmann <sean.fuhrmann@sailpos.com>
Date: Wed, 6 Apr 2022 15:08:36 -0500
Subject: [PATCH] Adding support from checking first object in collection if
 TEntity does not find a a model match

---
 src/FlexLabs.EntityFrameworkCore.Upsert/UpsertCommandBuilder.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/FlexLabs.EntityFrameworkCore.Upsert/UpsertCommandBuilder.cs b/src/FlexLabs.EntityFrameworkCore.Upsert/UpsertCommandBuilder.cs
index 341d535..a6af141 100644
--- a/src/FlexLabs.EntityFrameworkCore.Upsert/UpsertCommandBuilder.cs
+++ b/src/FlexLabs.EntityFrameworkCore.Upsert/UpsertCommandBuilder.cs
@@ -39,6 +39,7 @@ internal UpsertCommandBuilder(DbContext dbContext, ICollection<TEntity> entities
             _entities = entities;
 
             _entityType = dbContext.GetService<IModel>().FindEntityType(typeof(TEntity))
+                ?? (entities.Count == 0 ? null : dbContext.GetService<IModel>().FindEntityType(entities.First().GetType()))
                 ?? throw new InvalidOperationException(Resources.EntityTypeMustBeMappedInDbContext);
         }