diff --git a/src/api/endpoints/app/create.js b/src/api/endpoints/app/create.js
index 9ce98b197a..1febd9b568 100644
--- a/src/api/endpoints/app/create.js
+++ b/src/api/endpoints/app/create.js
@@ -109,7 +109,7 @@ module.exports = async (params, user) =>
 	const secret = rndstr('a-zA-Z0-9', 32);
 
 	// Create account
-	const inserted = await App.insert({
+	const app = await App.insert({
 		created_at: new Date(),
 		user_id: user._id,
 		name: name,
@@ -121,8 +121,6 @@ module.exports = async (params, user) =>
 		secret: secret
 	});
 
-	const app = inserted.ops[0];
-
 	// Response
 	res(await serialize(app));
 });
diff --git a/src/api/endpoints/auth/session/generate.js b/src/api/endpoints/auth/session/generate.js
index f67209eee3..6cc124f9ec 100644
--- a/src/api/endpoints/auth/session/generate.js
+++ b/src/api/endpoints/auth/session/generate.js
@@ -66,14 +66,12 @@ module.exports = (params) =>
 	const token = uuid.v4();
 
 	// Create session token document
-	const inserted = await AuthSess.insert({
+	const doc = await AuthSess.insert({
 		created_at: new Date(),
 		app_id: app._id,
 		token: token
 	});
 
-	const doc = inserted.ops[0];
-
 	// Response
 	res({
 		token: doc.token,
diff --git a/src/api/endpoints/drive/folders/create.js b/src/api/endpoints/drive/folders/create.js
index ba40d1763e..a9c0968aa6 100644
--- a/src/api/endpoints/drive/folders/create.js
+++ b/src/api/endpoints/drive/folders/create.js
@@ -59,15 +59,13 @@ module.exports = (params, user) =>
 	}
 
 	// Create folder
-	const inserted = await DriveFolder.insert({
+	const folder = await DriveFolder.insert({
 		created_at: new Date(),
 		name: name,
 		parent_id: parent !== null ? parent._id : null,
 		user_id: user._id
 	});
 
-	const folder = inserted.ops[0];
-
 	// Serialize
 	const folderObj = await serialize(folder);
 
diff --git a/src/api/endpoints/messaging/messages/create.js b/src/api/endpoints/messaging/messages/create.js
index 1cd02cfc58..021ec98e04 100644
--- a/src/api/endpoints/messaging/messages/create.js
+++ b/src/api/endpoints/messaging/messages/create.js
@@ -77,7 +77,7 @@ module.exports = (params, user) =>
 	}
 
 	// メッセージを作成
-	const inserted = await Message.insert({
+	const message = await Message.insert({
 		created_at: new Date(),
 		file_id: file ? file._id : undefined,
 		recipient_id: recipient._id,
@@ -86,8 +86,6 @@ module.exports = (params, user) =>
 		is_read: false
 	});
 
-	const message = inserted.ops[0];
-
 	// Serialize
 	const messageObj = await serialize(message);
 
diff --git a/src/api/endpoints/posts/favorites/create.js b/src/api/endpoints/posts/favorites/create.js
index d20a523d5d..f2e29bbc39 100644
--- a/src/api/endpoints/posts/favorites/create.js
+++ b/src/api/endpoints/posts/favorites/create.js
@@ -43,14 +43,12 @@ module.exports = (params, user) =>
 	}
 
 	// Create favorite
-	const inserted = await Favorite.insert({
+	await Favorite.insert({
 		created_at: new Date(),
 		post_id: post._id,
 		user_id: user._id
 	});
 
-	const favorite = inserted.ops[0];
-
 	// Send response
 	res();
 });