模型查询接口增加按子表字段查询

common/Tnb.Common/Extension/TnbStringExtensions.cs

@@ -1,5 +1,6 @@
 using System.Text.RegularExpressions;
 using JNPF.Common.Extension;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
 
 namespace System;
 
@@ -183,4 +184,17 @@ public static class StringExtensions
     public static string ToCamel(this string str) => str.SplitWord().Select((a, i) => i == 0 ? a : a.UpperFirst()).JoinAsString("");
 
     #endregion
+
+    public static (string, string) LastSplit(this string str, char seperate)
+    {
+        int n = str.LastIndexOf(seperate);
+        if(n > 0)
+        {
+            return (str.Substring(0, n), str.Substring(n + 1));
+        }
+        else
+        {
+            return (str, null);
+        }
+    }
 }