## v0.3.19

- 兼容 GetTableByEntity 有可能因为传入数组类型的错误；
- 修复 UnitOfWork 事务创建逻辑 bug；
- 增加 FreeSql.DbContext 扩展包；
- 调整 UnitOfWork、DbContext 不提交时默认会回滚；

Examples/dbcontext_01/DbContexts/SongContext.cs

@@ -0,0 +1,49 @@
+using FreeSql;
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+
+namespace dbcontext_01 {
+
+	public class SongContext : DbContext {
+
+		public DbSet<Song> Songs { get; set; }
+		public DbSet<Song> Tags { get; set; }
+
+		protected override void OnConfiguring(DbContextOptionsBuilder builder) {
+			builder.UseFreeSql(dbcontext_01.Startup.Fsql);
+		}
+	}
+
+
+	public class Song {
+		[Column(IsIdentity = true)]
+		public int Id { get; set; }
+		public DateTime? Create_time { get; set; }
+		public bool? Is_deleted { get; set; }
+		public string Title { get; set; }
+		public string Url { get; set; }
+
+		public virtual ICollection<Tag> Tags { get; set; }
+	}
+	public class Song_tag {
+		public int Song_id { get; set; }
+		public virtual Song Song { get; set; }
+
+		public int Tag_id { get; set; }
+		public virtual Tag Tag { get; set; }
+	}
+
+	public class Tag {
+		[Column(IsIdentity = true)]
+		public int Id { get; set; }
+		public int? Parent_id { get; set; }
+		public virtual Tag Parent { get; set; }
+
+		public decimal? Ddd { get; set; }
+		public string Name { get; set; }
+
+		public virtual ICollection<Song> Songs { get; set; }
+		public virtual ICollection<Tag> Tags { get; set; }
+	}
+}