diff --git a/spike/review/reinvent/ezmded/server/id.go b/spike/review/reinvent/ezmded/server/id.go
index 042dee4..2a5861f 100644
--- a/spike/review/reinvent/ezmded/server/id.go
+++ b/spike/review/reinvent/ezmded/server/id.go
@@ -14,11 +14,11 @@ func NewID(s string) ID {
 }
 
 func (id ID) Push(child string) ID {
-	return ID(path.Join(id.String(), child)).withClean()
+	return NewID(path.Join(id.String(), child)).withClean()
 }
 
 func (id ID) Pop() ID {
-	pid := path.Clean(ID(path.Dir(id.String())).withClean().String())
+	pid := path.Clean(NewID(path.Dir(id.String())).withClean().String())
 	if strings.HasPrefix(pid, ".") {
 		return ""
 	}
diff --git a/spike/review/reinvent/ezmded/server/server.go b/spike/review/reinvent/ezmded/server/server.go
index 12f0ae0..3beabfd 100644
--- a/spike/review/reinvent/ezmded/server/server.go
+++ b/spike/review/reinvent/ezmded/server/server.go
@@ -499,7 +499,7 @@ func (server *Server) _apiV0SearchHandler(query string) ([][2]string, error) {
 		result = append(result, [2]string{id.URLSafeString(), title})
 		return nil
 	}); err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed for each: %v", err)
 	}
 	return result, nil
 }
diff --git a/spike/review/reinvent/ezmded/server/server_test.go b/spike/review/reinvent/ezmded/server/server_test.go
index fae9df0..a64287a 100644
--- a/spike/review/reinvent/ezmded/server/server_test.go
+++ b/spike/review/reinvent/ezmded/server/server_test.go
@@ -31,11 +31,11 @@ func TestServerRoutes(t *testing.T) {
 	ensureAndWrite(server.diskMediaPath("delid"), []byte("hi"))
 
 	tree := server.tree()
-	if err := tree.Put(ID("getfid"), Leaf{Title: "", Content: "getfid body"}); err != nil {
+	if err := tree.Put(NewID("getfid"), Leaf{Title: "", Content: "getfid body"}); err != nil {
 		t.Fatal(err)
 	}
-	tree.Put(ID("putfid"), Leaf{Title: "putfid title", Content: "initial putfid body"})
-	tree.Put(ID("delfid"), Leaf{Title: "delfid title", Content: "delfid body"})
+	tree.Put(NewID("putfid"), Leaf{Title: "putfid title", Content: "initial putfid body"})
+	tree.Put(NewID("delfid"), Leaf{Title: "delfid title", Content: "delfid body"})
 	t.Log(tree.GetRoot())
 
 	ensureAndWrite(path.Join(server.root, "index.html"), []byte("mom"))
@@ -151,7 +151,7 @@ func TestServerPutTreeGetFile(t *testing.T) {
 	if err := server.Routes(); err != nil {
 		t.Fatal(err)
 	}
-	server.tree().Put(ID("my pid"), Leaf{})
+	server.tree().Put(NewID("my pid"), Leaf{})
 	var id string
 	t.Run("put to create an id", func(t *testing.T) {
 		r := httptest.NewRequest(http.MethodPut, "/my%20pid/my-put-id", strings.NewReader("body"))
diff --git a/spike/review/reinvent/ezmded/server/tree.go b/spike/review/reinvent/ezmded/server/tree.go
index 15e02ba..6993cc6 100644
--- a/spike/review/reinvent/ezmded/server/tree.go
+++ b/spike/review/reinvent/ezmded/server/tree.go
@@ -26,7 +26,7 @@ func (branch Branch) forEach(preid ID, foo func(ID, Leaf) error) error {
 		return err
 	}
 	for id, child := range branch.Branches {
-		if err := child.forEach(preid.Push(string(id)), foo); err != nil {
+		if err := child.forEach(id, foo); err != nil {
 			return err
 		}
 	}
diff --git a/spike/review/reinvent/ezmded/server/tree_test.go b/spike/review/reinvent/ezmded/server/tree_test.go
index a13b0b4..f4d56dc 100644
--- a/spike/review/reinvent/ezmded/server/tree_test.go
+++ b/spike/review/reinvent/ezmded/server/tree_test.go
@@ -3,21 +3,44 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"path"
+	"strconv"
 	"testing"
 )
 
-func TestTreeDel(t *testing.T) {
+func TestTreeForEach(t *testing.T) {
 	tree := NewTree(t.TempDir())
-	if err := tree.Put(ID("id"), Leaf{}); err != nil {
+	id := ""
+	for i := 0; i < 5; i++ {
+		id = path.Join(id, strconv.Itoa(i))
+		if err := tree.Put(NewID(id), Leaf{Title: id, Content: id}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	branch, err := tree.GetRoot()
+	if err != nil {
 		t.Fatal(err)
 	}
-	if err := tree.Put(ID("id/subid"), Leaf{}); err != nil {
+	if err := branch.ForEach(func(id ID, leaf Leaf) error {
+		t.Logf("id=%+v, leaf=%+v", id, leaf)
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestTreeDel(t *testing.T) {
+	tree := NewTree(t.TempDir())
+	if err := tree.Put(NewID("id"), Leaf{}); err != nil {
+		t.Fatal(err)
+	}
+	if err := tree.Put(NewID("id/subid"), Leaf{}); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := tree.Del(ID("id")); err != nil {
+	if err := tree.Del(NewID("id")); err != nil {
 		t.Fatal(err)
-	} else if got, err := tree.Get(ID("id")); err != nil {
+	} else if got, err := tree.Get(NewID("id")); err != nil {
 		t.Fatal(err)
 	} else if !got.Deleted {
 		t.Fatal(got)
@@ -45,7 +68,7 @@ func TestTreeCrud(t *testing.T) {
 		t.Fatal(m)
 	}
 
-	if err := tree.Del(ID("id")); err != nil {
+	if err := tree.Del(NewID("id")); err != nil {
 		t.Fatal(err)
 	}
 
@@ -54,9 +77,9 @@ func TestTreeCrud(t *testing.T) {
 		Deleted: false,
 		Content: "leaf content",
 	}
-	if err := tree.Put(ID("id"), want); err != nil {
+	if err := tree.Put(NewID("id"), want); err != nil {
 		t.Fatal(err)
-	} else if l, err := tree.Get(ID("id")); err != nil {
+	} else if l, err := tree.Get(NewID("id")); err != nil {
 		t.Fatal(err)
 	} else if l != want {
 		t.Fatal(want, l)