- 优化 枚举属性的默认值容错，枚举下标不存在 0 的时候，mysql 迁移结构默认值报错；

FreeSql.Tests/FreeSql.Tests.Provider.MySqlConnector/UnitTest1.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+
+namespace FreeSql.Tests.MySqlConnector
+{
+
+    public class UnitTest1
+    {
+        public class TestAddEnum
+        {
+            public Guid Id { get; set; }
+            public TestAddEnumType Type { get; set; }
+            public PermissionTypeEnum TestType { get; set; }
+        }
+        public enum TestAddEnumType { 中国人, 日本人 }
+
+        public enum PermissionTypeEnum
+        {
+            /// <summary>
+            /// 菜单
+            /// </summary>
+            Menu = 1,
+            /// <summary>
+            /// 接口
+            /// </summary>
+            Api = 2
+        }
+
+        [Fact]
+        public void Test1()
+        {
+            g.mysql.Select<TestAddEnum>().ToList();
+        }
+    }
+}

FreeSql.Tests/FreeSql.Tests/UnitTest1.cs

@@ -408,10 +408,18 @@ namespace FreeSql.Tests
             public Guid? Id { get; set; }
             public string xxx { get; set; }
         }
+        public class TestAddEnum
+        {
+            public Guid Id { get; set; }
+            public TestAddEnumType Type { get; set; }
+        }
+        public enum TestAddEnumType { 中国人, 日本人 }
 
         [Fact]
         public void Test1()
         {
+            g.mysql.Select<TestAddEnum>().ToList();
+
             g.sqlite.Insert(new TestGuidId { xxx = "111" }).ExecuteAffrows();
             g.sqlite.Insert(new TestGuidId { xxx = "222" }).ExecuteAffrows();
             var gkkdk1 = g.sqlite.Select<TestGuidId>().Where(a => true).ToList();

FreeSql/Internal/UtilsExpressionTree.cs

@@ -153,6 +153,19 @@ namespace FreeSql.Internal
                     continue;
                 }
                 if (entityDefault != null) colattr.DbDefautValue = trytb.Properties[p.Name].GetValue(entityDefault);
+                if (p.PropertyType.IsEnum)
+                {
+                    var isEqualsEnumValue = false;
+                    var enumValues = Enum.GetValues(p.PropertyType);
+                    for (var a = 0; a < enumValues.Length; a++)
+                        if (object.Equals(colattr.DbDefautValue, enumValues.GetValue(a)))
+                        {
+                            isEqualsEnumValue = true;
+                            break;
+                        }
+                    if (isEqualsEnumValue == false)
+                        colattr.DbDefautValue = enumValues.Length > 0 ? enumValues.GetValue(0) : null;
+                }
                 if (colattr.DbDefautValue != null && p.PropertyType != colattr.MapType) colattr.DbDefautValue = Utils.GetDataReaderValue(colattr.MapType, colattr.DbDefautValue);
                 if (colattr.DbDefautValue == null) colattr.DbDefautValue = tp?.defaultValue;
                 if (colattr.IsNullable == false && colattr.DbDefautValue == null)