diff --git a/Directory.Build.props b/Directory.Build.props
index a363d7b9..a78d6df4 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -3,6 +3,9 @@
     <SolutionDir>$(MSBuildThisFileDirectory)</SolutionDir>
     <LangVersion>latest</LangVersion>
     <NoWarn>$(NoWarn);CS1570;CS1587;CS1591;CS8601;CS8602;CS8603;CS8618;</NoWarn>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
diff --git a/common/Tnb.Common/Extension/TnbStringExtensions.cs b/common/Tnb.Common/Extension/TnbStringExtensions.cs
index 25e9d5d8..c6412e97 100644
--- a/common/Tnb.Common/Extension/TnbStringExtensions.cs
+++ b/common/Tnb.Common/Extension/TnbStringExtensions.cs
@@ -184,7 +184,10 @@ public static class StringExtensions
 
     #endregion
 
-    public static (string, string) LastSplit(this string str, char seperate)
+    /// <summary>
+    /// 查找路径的上一级
+    /// </summary>
+    public static (string?, string) LastSplitOnce(this string str, char seperate)
     {
         int n = str.LastIndexOf(seperate);
         if (n > 0)
@@ -193,7 +196,8 @@ public static class StringExtensions
         }
         else
         {
-            return (str, null);
+            return (null, str);
         }
     }
+
 }
\ No newline at end of file
diff --git a/visualdev/Tnb.Vengine/Domain/VmQueryParser.cs b/visualdev/Tnb.Vengine/Domain/VmQueryParser.cs
index dc1729f7..5f698831 100644
--- a/visualdev/Tnb.Vengine/Domain/VmQueryParser.cs
+++ b/visualdev/Tnb.Vengine/Domain/VmQueryParser.cs
@@ -8,52 +8,57 @@ namespace Tnb.Vengine.Domain
         private readonly IDataAccess _dataAccess;
         private readonly Vmodel _root;
         private List<string> _outputs;
-        private Dictionary<string, OutputSelect> _selectProps = new Dictionary<string, OutputSelect>();
+        private Dictionary<string, VmSelect> _selectProps = new Dictionary<string, VmSelect>();
         private Dictionary<string, Vmodel?> _navModels = new Dictionary<string, Vmodel?>();
         public VmQueryParser(IDataAccess dataAccess, Vmodel rootModel, string output)
         {
             _dataAccess = dataAccess;
             _root = rootModel;
-            _outputs = output.Split(',').Distinct().ToList();
-            ParseOutputStr();
+            ParseOutputStr(output);
         }
         /// <summary>
         /// 按模型组织要输出的属性
         /// </summary>
-        private void ParseOutputStr()
+        private void ParseOutputStr(string output)
         {
+            _outputs = output.Split(',').Distinct().ToList();
+            _selectProps.Add(Vmodel.MAIN_ALIES, new VmSelect() { navModel = _root });
             foreach (var outStr in _outputs)
             {
-                if (string.IsNullOrWhiteSpace(outStr))
+                if (string.IsNullOrWhiteSpace(outStr)) continue;
+                var codes = outStr.Split('.');
+                if (codes.Length == 1)
                 {
+                    _selectProps[Vmodel.MAIN_ALIES].propCodes.Add(outStr);
                     continue;
                 }
-                string vmPath;
-                int n = outStr.LastIndexOf('.');
-                if (n < 1)
+                var vmPath = "";
+                for (int i = 0; i < codes.Length - 1; i++)
                 {
-                    vmPath = Vmodel.MAIN_ALIES;
+                    vmPath = i == 0 ? codes[i] : vmPath + "." + codes[i];
+                    if (!_selectProps.ContainsKey(vmPath))
+                    {
+                        _selectProps.Add(vmPath, new VmSelect(vmPath, i + 2));
+                    }
+                    if (i == codes.Length - 2)
+                    {
+                        _selectProps[vmPath].propCodes.Add(codes[i + 1]);
+                    }
                 }
-                else
-                {
-                    vmPath = outStr.Substring(0, n);
-                }
-                if (!_selectProps.ContainsKey(vmPath))
-                {
-                    _selectProps.Add(vmPath, new OutputSelect { navPaths = vmPath.Split(',').ToList(), vmPath = vmPath });
-                }
-                var outSelect = _selectProps[vmPath];
-                outSelect.propCodes.Add(outStr.Substring(n + 1));
             }
         }
 
         private async Task LoadNavModel()
         {
+            var keys = _selectProps.Keys.Where(a => a != Vmodel.MAIN_ALIES).OrderBy(a => a).ToList();
             foreach (var selVm in _selectProps.Values)
             {
-                //if(selVm.navModel != null)
+                if (_navModels.ContainsKey(selVm.path))
+                {
+                    continue;
+                }
             }
-            var navProps = _root.navProps.Where(a => _selectProps.Values.Any(b => b.vmPath.StartsWith(a.code + "."))).ToList();
+            var navProps = _root.navProps.Where(a => _selectProps.Values.Any(b => b.path.StartsWith(a.code + "."))).ToList();
             await LoadVmodelNavigateAsync(navProps);
         }
         private async Task LoadVmodelNavigateAsync(List<VmNavProp> navProps)
@@ -65,30 +70,30 @@ namespace Tnb.Vengine.Domain
             foreach (var navProp in navProps)
             {
                 navProp.naviModel = (Vmodel)navs.GetOrDefault(navProp.vmid);
-                navProp.naviModel.navProps.Where(a => _selectProps.Values.Any(b => b.vmPath.StartsWith(a.code + "."))).ToList();
+                navProp.naviModel.navProps.Where(a => _selectProps.Values.Any(b => b.path.StartsWith(a.code + "."))).ToList();
             }
         }
 
     }
 
-    internal class OutputSelect
+    internal class VmSelect
     {
         public Vmodel? navModel { get; set; }
-        public string navPath { get; set; } = string.Empty;
-        public string vmPath { get; set; } = string.Empty;
+        public string path { get; set; } = Vmodel.MAIN_ALIES;
+        public int level { get; set; } = 1;
         public eNavigateType navType { get; set; } = eNavigateType.None;
         public List<string> navPaths { get; set; } = new List<string>();
 
         public List<string> propCodes { get; set; } = new List<string>();
         public List<string> fieldCodes { get; set; } = new List<string>();
 
-        public OutputSelect()
+        public VmSelect()
         {
-
         }
-        public OutputSelect(Vmodel model)
+        public VmSelect(string vmPath, int vmLevel)
         {
-            vmPath = Vmodel.MAIN_ALIES;
+            path = vmPath;
+            level = vmLevel;
         }
     }
 
diff --git a/visualdev/Tnb.Vengine/Domain/Vmodel.cs b/visualdev/Tnb.Vengine/Domain/Vmodel.cs
index 070ce510..23198e81 100644
--- a/visualdev/Tnb.Vengine/Domain/Vmodel.cs
+++ b/visualdev/Tnb.Vengine/Domain/Vmodel.cs
@@ -332,7 +332,7 @@ public partial class Vmodel : Entity
             if (navCode == VmSelectProp.MAIN_ALIES) continue;
             var navProp = navProps.First(a => a.code == navCode);
             if (navProp.naviModel == null || navProp.navType != eNavigateType.OneToOne) continue;
-            JoinInfoParameter join = new JoinInfoParameter { TableName = navProp.naviModel.tableName, ShortName = navCode, Type = JoinType.Inner };
+            JoinInfoParameter join = new JoinInfoParameter { TableName = navProp.naviModel.tableName, ShortName = navCode, Type = JoinType.Left };
             var fkField = navProp.naviModel.PropCodeToFieldCode(navProp.fkField);
             var refField = navProp.refField;
             if (navProp.refCode != VmSelectProp.MAIN_ALIES)