diff --git a/FreeSql.Tests/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs b/FreeSql.Tests/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
index e0c46327..61912683 100644
--- a/FreeSql.Tests/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
@@ -870,7 +870,7 @@ namespace FreeSql.Tests.Sqlite
             [Column(IsIdentity = true)]
             public int id { get; set; }
 
-            public int model2111Idaaa { get; set; }
+            public int? model2111Idaaa { get; set; }
             public string title { get; set; }
 
             public List<TestInclude_OneToManyModel4> childs2 { get; set; }
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
index ef72a209..dc445c2a 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
@@ -489,8 +489,12 @@ namespace FreeSql.Internal.CommonProvider
                                 actWeiParse(binaryExp.Right);
                                 break;
                             case ExpressionType.Equal:
-                                var leftP1MemberExp = binaryExp.Left as MemberExpression;
-                                var rightP1MemberExp = binaryExp.Right as MemberExpression;
+                                Expression leftExp = binaryExp.Left;
+                                Expression rightExp = binaryExp.Right;
+                                while (leftExp.NodeType == ExpressionType.Convert) leftExp = (leftExp as UnaryExpression)?.Operand;
+                                while (rightExp.NodeType == ExpressionType.Convert) rightExp = (rightExp as UnaryExpression)?.Operand;
+                                var leftP1MemberExp = leftExp as MemberExpression;
+                                var rightP1MemberExp = rightExp as MemberExpression;
                                 if (leftP1MemberExp == null || rightP1MemberExp == null) throw throwNavigateSelector;
 
                                 if (leftP1MemberExp.Expression == whereExpArgLamb.Parameters[0])