From 6c1d532d096b07d079e0fdae4065731917c234f3 Mon Sep 17 00:00:00 2001
From: 28810 <28810@YEXIANGQIN>
Date: Sat, 16 Nov 2019 00:10:04 +0800
Subject: [PATCH] =?UTF-8?q?-=20=E4=BC=98=E5=8C=96=20ManyToMany=20=E4=B8=AD?=
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 =?UTF-8?q?=20[Column(IsPrimary=20=3D=20true)]=20=E7=89=B9=E6=80=A7?=
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---
 FreeSql/Internal/UtilsExpressionTree.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/FreeSql/Internal/UtilsExpressionTree.cs b/FreeSql/Internal/UtilsExpressionTree.cs
index a86fd69f..0b999a83 100644
--- a/FreeSql/Internal/UtilsExpressionTree.cs
+++ b/FreeSql/Internal/UtilsExpressionTree.cs
@@ -547,7 +547,9 @@ namespace FreeSql.Internal
                                 nvref.MiddleColumns.AddRange(trytbTf.Columns);
 
                                 if (tbmid.Primarys.Any() == false)
-                                    trytbTf.Columns.Select(c => tbmid.ColumnsByCs[c.CsName].Attribute.IsPrimary = true);
+                                    foreach (var c in trytbTf.Columns)
+                                        tbmid.ColumnsByCs[c.CsName].Attribute.IsPrimary = true;
+
                                 if (isLazy)
                                 {
                                     for (var a = 0; a < trytbTf.RefColumns.Count; a++)
@@ -592,7 +594,8 @@ namespace FreeSql.Internal
                                     nvref.MiddleColumns.AddRange(tbrefTf.Columns);
 
                                     if (tbmid.Primarys.Any() == false)
-                                        tbrefTf.Columns.Select(c => tbmid.ColumnsByCs[c.CsName].Attribute.IsPrimary = true);
+                                        foreach (var c in tbrefTf.Columns)
+                                            tbmid.ColumnsByCs[c.CsName].Attribute.IsPrimary = true;
 
                                     if (isLazy)
                                     {