## 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/Controllers/ValuesController.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+
+namespace dbcontext_01.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class ValuesController : ControllerBase
+    {
+
+		IFreeSql _orm;
+		public ValuesController(SongContext songContext, IFreeSql orm) {
+
+			_orm = orm;
+			
+		}
+
+		// GET api/values
+		[HttpGet]
+        async public Task<string> Get()
+        {
+
+			long id = 0;
+
+			try {
+				using (var ctx = new SongContext()) {
+
+					id = await ctx.Songs.Insert(new Song { }).ExecuteIdentityAsync();
+
+					var item = await ctx.Songs.Select.Where(a => a.Id == id).FirstAsync();
+
+					throw new Exception("回滚");
+
+				}
+			} catch {
+				var item = await _orm.Select<Song>().Where(a => a.Id == id).FirstAsync();
+
+				throw;
+			}
+        }
+
+        // GET api/values/5
+        [HttpGet("{id}")]
+        public ActionResult<string> Get(int id)
+        {
+            return "value";
+        }
+
+        // POST api/values
+        [HttpPost]
+        public void Post([FromBody] string value)
+        {
+        }
+
+        // PUT api/values/5
+        [HttpPut("{id}")]
+        public void Put(int id, [FromBody] string value)
+        {
+        }
+
+        // DELETE api/values/5
+        [HttpDelete("{id}")]
+        public void Delete(int id)
+        {
+        }
+    }
+}