tk/FreeSql
1
0
Fork 0
mirror of https://github.com/nsnail/FreeSql.git synced 2025-06-19 12:28:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

- 增加 ExpressionCallAttribute 特性，实现表达式函数自定义解析；

Browse Source
This commit is contained in:
28810
2019-11-20 13:32:49 +08:00
parent 91f0bb92a1
commit d42b2fc2b8
6 changed files with 266 additions and 160 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
FreeSql.Tests/FreeSql.Tests/UnitTest2.cs
View File

@ -10,6 +10,7 @@ using Npgsql.LegacyPostgis;
using System.Linq.Expressions;
using System.Threading.Tasks;
using System.ComponentModel.DataAnnotations;
using System.Threading;
namespace FreeSql.Tests
{
@ -167,6 +168,34 @@ namespace FreeSql.Tests
[Fact]
public void Test02()
{
g.mysql.Aop.ParseExpression = (s, e) =>
{
if (e.Expression.NodeType == ExpressionType.Call)
{
var callExp = e.Expression as MethodCallExpression;
if (callExp.Object?.Type == typeof(DateTime) &&
callExp.Method.Name == "ToString" &&
callExp.Arguments.Count == 1 &&
callExp.Arguments[0].Type == typeof(string) &&
callExp.Arguments[0].NodeType == ExpressionType.Constant)
{
var format = (callExp.Arguments[0] as ConstantExpression)?.Value?.ToString();
if (string.IsNullOrEmpty(format) == false)
{
var tmp = e.FreeParse(callExp.Object);
switch (format)
{
case "yyyy-MM-dd HH:mm":
tmp = $"date_format({tmp}, '%Y-%m-%d %H:%i')";
break;
}
e.Result = tmp;
}
}
}
};
var dbs = g.sqlserver.DbFirst.GetDatabases();
@ -233,6 +262,21 @@ namespace FreeSql.Tests
.IncludeMany(m => m.Permissions.Where(p => p.SysModuleId == m.Id),
then => then.LeftJoin(p => p.Button.Id == p.SysModuleButtonId))
.ToList();
var sql = g.sqlite.Select<SysModule>()
.ToSql(a => a.CreateTime.FormatDateTime("yyyy-MM-dd"));
}
}
[ExpressionCall]
public static class DbFunc
{
static ThreadLocal<ExpressionCallContext> context = new ThreadLocal<ExpressionCallContext>();
public static string FormatDateTime(this DateTime that, string arg1)
{
return $"date_format({context.Value.Values["arg1"]})";
}
}
}