diff --git a/Controller/MultidatabaseContentsController.php b/Controller/MultidatabaseContentsController.php
index c65a707..d67e2c8 100644
--- a/Controller/MultidatabaseContentsController.php
+++ b/Controller/MultidatabaseContentsController.php
@@ -19,6 +19,7 @@
  *
  * @author Tomoyuki OHNO (Ricksoft Co., Ltd.) <ohno.tomoyuki@ricksoft.jp>
  * @package NetCommons\Multidatabases\Controller
+ * @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
  */
 class MultidatabaseContentsController extends MultidatabasesAppController {
 
@@ -407,6 +408,7 @@ public function download() {
  * 検索
  *
  * @return void
+ * @SuppressWarnings(PHPMD.CyclomaticComplexity)
  */
 	public function search() {
 		// クエリを取得する
@@ -442,6 +444,9 @@ public function search() {
 		}
 
 		$searchConds = $this->MultidatabaseContentSearch->getSearchConds($query);
+		if (!$searchConds) {
+			$searchConds = ['conditions' => [], 'order' => []];
+		}
 		$conditions = $this->__listBase($searchConds['conditions']);
 
 		// paginatorへ渡すための条件を取得する
diff --git a/Model/MultidatabaseContent.php b/Model/MultidatabaseContent.php
index eadd57f..d9fdc36 100644
--- a/Model/MultidatabaseContent.php
+++ b/Model/MultidatabaseContent.php
@@ -381,6 +381,8 @@ public function deleteContentByKey($key) {
 				'MultidatabaseContent.Key' => $key,
 			];
 
+			$this->Behaviors->load('Topics.Topics');
+
 			if ($result = $this->deleteAll($conditions, true, true)) {
 				$this->commit();
 			} else {
diff --git a/Model/MultidatabaseContentSearch.php b/Model/MultidatabaseContentSearch.php
index 138e1b3..1eca98f 100644
--- a/Model/MultidatabaseContentSearch.php
+++ b/Model/MultidatabaseContentSearch.php
@@ -181,7 +181,11 @@ public function getCondSortOrder($sortCol = '') {
 			$sortColDir = 'desc';
 		}
 
-		$sortOrder = ['MultidatabaseContent.' . $sortCol => $sortColDir];
+		$sortOrder = [
+			'MultidatabaseContent.' . $sortCol => $sortColDir,
+			'MultidatabaseContent.created' => $sortColDir,
+			'MultidatabaseContent.id' => $sortColDir
+		];
 
 		return $sortOrder;
 	}