1 files changed, 9 insertions, 3 deletions
diff --git a/aconf/model/model.lua b/aconf/model/model.lua
index 7ce3060..e71e73c 100644
--- a/aconf/model/model.lua
+++ b/aconf/model/model.lua
@@ -177,6 +177,11 @@ function M.Model:init(context)
       function mt.removable() return self:is_removable() end
    end
 
+   local value_removable = mt.value_removable
+   function mt.value_removable(v)
+      return type(v) == 'table' and value_removable(v)
+   end
+
    if not mt.txn then return end
 
 
@@ -184,8 +189,9 @@ function M.Model:init(context)
 
    function mt.save(k, v)
       k = normalize_name(k)
-      mt.check_removable(k, v)
-      return mt.member(k, false, Field):save(v)
+      local field = mt.member(k, false, Field)
+      if isinstance(field, fld.TreeNode) then mt.check_removable(k, v) end
+      return field:save(v)
    end
 
    local function tmeta(tpe)
@@ -197,7 +203,7 @@ function M.Model:init(context)
    end
 
    function mt.members()
-      return map(function(f) return f.name end, mt.meta().fields)
+      return map(function(f) return f.name end, tmeta(Field))
    end
 
    function mt.validate()