diff --git a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexManager.java b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexManager.java
index 55c8726d..e9914764 100644
--- a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexManager.java
+++ b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexManager.java
@@ -57,13 +57,13 @@ public class IndexManager {
 
 	@BizTransactional
 	public IndexNode createDatabase(NodeCreate create) {
-		ensureChildNameNotUsed(create, IndexNodeType.DATABASE, true);
+		indexSupport.ensureChildNameNotUsed(create, IndexNodeType.DATABASE, true);
 		return indexSupport.createNode(create, IndexNodeType.DATABASE);
 	}
 
 	@BizTransactional
 	public IndexNode createDir(NodeCreate create) {
-		ensureChildNameNotUsed(create, IndexNodeType.DIRECTORY, true);
+		indexSupport.ensureChildNameNotUsed(create, IndexNodeType.DIRECTORY, true);
 		return indexSupport.createNode(create, IndexNodeType.DIRECTORY);
 	}
 
@@ -71,7 +71,7 @@ public class IndexManager {
 		BizAssertions.assertTrue(format.creatable(), "无法创建: {}", format.readableName());
 		BizAssertions.assertFalse(TransactionSynchronizationManager.isActualTransactionActive(), "不能在事务中使用");
 		// check without lock
-		ensureChildNameNotUsed(create, IndexNodeType.FILE, false);
+		indexSupport.ensureChildNameNotUsed(create, IndexNodeType.FILE, false);
 		String fullFileName = String.format("%s.%s", create.name(), format.createFileExtension());
 		String emptyOssFileKey = format == FileFormat.WORD //
 				? docProps.getCreateFileOssFileKeyWord() //
@@ -107,7 +107,7 @@ public class IndexManager {
 			return transaction.execute(unused -> {
 				try {
 					// check with lock
-					ensureChildNameNotUsed(create, IndexNodeType.FILE, true);
+					indexSupport.ensureChildNameNotUsed(create, IndexNodeType.FILE, true);
 				}
 				catch (NameUsedException e) {
 					deleteOssFile.set(true);
@@ -130,14 +130,6 @@ public class IndexManager {
 		}
 	}
 
-	private void ensureChildNameNotUsed(NodeCreate create, IndexNodeType nodeType, boolean withLock) {
-		if (indexSupport.childrenNameDuplicatable(create))
-			return;
-		if (withLock)
-			indexSupport.lockParentAndReleaseOnCommit(create);
-		indexSupport.ensureChildNameNotUsed(create, nodeType, create.name());
-	}
-
 	@BizTransactional
 	public void rename(String code, String newName) {
 		IndexNode indexNode = getOrThrow(code);
diff --git a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
index f180bfc8..ee37d3ff 100644
--- a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
+++ b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
@@ -134,6 +134,14 @@ public class IndexSupport {
 		indexNodeDao.rename(rename.getCode(), newName);
 	}
 
+	void ensureChildNameNotUsed(NodeCreate create, IndexNodeType nodeType, boolean withLock) {
+		if (childrenNameDuplicatable(create))
+			return;
+		if (withLock)
+			lockParentAndReleaseOnCommit(create);
+		ensureChildNameNotUsed(create, nodeType, create.name());
+	}
+
 	void ensureChildNameNotUsed(IndexNodeParentScope parentScope, IndexNodeType nodeType, String childName) {
 		IndexNode child = indexNodeDao.findValidChildByName(parentScope, nodeType, childName);
 		// don't use BizAssertions.assertNull