- 优化 ICodeFirst.SyncStructure 错误提示，当使用不可迁移实体时；

FreeSql.Tests/UnitTest1.cs

@@ -9,6 +9,7 @@ using NpgsqlTypes;
 using Npgsql.LegacyPostgis;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
+using System.Collections;
 
 namespace FreeSql.Tests {
 	public class UnitTest1 {
@@ -112,9 +113,24 @@ namespace FreeSql.Tests {
 
 		}
 
+		public class TestEnumable : IEnumerable<TestEnumable> {
+			public IEnumerator<TestEnumable> GetEnumerator() {
+				throw new NotImplementedException();
+			}
+
+			IEnumerator IEnumerable.GetEnumerator() {
+				throw new NotImplementedException();
+			}
+		}
+
 		[Fact]
 		public void Test1() {
 
+			g.sqlite.CodeFirst.SyncStructure<TestEnumable>();
+
+			var TestEnumable = new TestEnumable();
+			
+
 			g.sqlite.GetRepository<Model1, int>().Insert(new Model1 {
 				title = "test_" + DateTime.Now.ToString("yyyyMMddHHmmss"),
 				M2Id = DateTime.Now.Second + DateTime.Now.Minute,

FreeSql/Internal/UtilsExpressionTree.cs

@@ -35,7 +35,7 @@ namespace FreeSql.Internal {
 			var tbc = _cacheGetTableByEntity.GetOrAdd(common._orm.Ado.DataType, k1 => new ConcurrentDictionary<Type, TableInfo>()); //区分数据库类型缓存
 			if (tbc.TryGetValue(entity, out var trytb)) return trytb;
 			if (common.CodeFirst.GetDbInfo(entity) != null) return null;
-			if (typeof(IEnumerable).IsAssignableFrom(entity)) return null;
+			if (typeof(IEnumerable).IsAssignableFrom(entity) && entity.IsGenericParameter == true) return null;
 			if (entity.IsArray) return null;
 
 			var tbattr = common.GetEntityTableAttribute(entity);

FreeSql/MySql/MySqlCodeFirst.cs

@@ -106,6 +106,8 @@ namespace FreeSql.MySql {
 				foreach (var entityType in entityTypes) {
 					if (sb.Length > 0) sb.Append("\r\n");
 					var tb = _commonUtils.GetTableByEntity(entityType);
+					if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
+					if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
 					var tbname = tb.DbName.Split(new[] { '.' }, 2);
 					if (tbname?.Length == 1) tbname = new[] { database, tbname[0] };
 

FreeSql/Oracle/OracleCodeFirst.cs

@@ -88,6 +88,8 @@ namespace FreeSql.Oracle {
 			foreach (var entityType in entityTypes) {
 				if (sb.Length > 0) sb.Append("\r\n");
 				var tb = _commonUtils.GetTableByEntity(entityType);
+				if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
+				if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
 				var tbname = tb.DbName.Split(new[] { '.' }, 2);
 				if (tbname?.Length == 1) tbname = new[] { userId, tbname[0] };
 

FreeSql/PostgreSQL/PostgreSQLCodeFirst.cs

@@ -131,6 +131,8 @@ namespace FreeSql.PostgreSQL {
 			foreach (var entityType in entityTypes) {
 				if (sb.Length > 0) sb.Append("\r\n");
 				var tb = _commonUtils.GetTableByEntity(entityType);
+				if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
+				if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
 				var tbname = tb.DbName.Split(new[] { '.' }, 2);
 				if (tbname?.Length == 1) tbname = new[] { "public", tbname[0] };
 

FreeSql/SqlServer/SqlServerCodeFirst.cs

@@ -98,6 +98,8 @@ namespace FreeSql.SqlServer {
 				foreach (var entityType in entityTypes) {
 					if (sb.Length > 0) sb.Append("\r\n");
 					var tb = _commonUtils.GetTableByEntity(entityType);
+					if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
+					if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
 					var tbname = tb.DbName.Split(new[] { '.' }, 3);
 					if (tbname?.Length == 1) tbname = new[] { database, "dbo", tbname[0] };
 					if (tbname?.Length == 2) tbname = new[] { database, tbname[0], tbname[1] };

FreeSql/Sqlite/SqliteCodeFirst.cs

@@ -83,6 +83,8 @@ namespace FreeSql.Sqlite {
 			foreach (var entityType in entityTypes) {
 				if (sb.Length > 0) sb.Append("\r\n");
 				var tb = _commonUtils.GetTableByEntity(entityType);
+				if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
+				if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
 				var tbname = tb.DbName.Split(new[] { '.' }, 2);
 				if (tbname?.Length == 1) tbname = new[] { "main", tbname[0] };