2 files changed, 35 insertions, 4 deletions

diff --git a/server/controllers/api/video-playlist.ts b/server/controllers/api/video-playlist.ts
index 0a7ff92df..c7dfc583b 100644
--- a/server/controllers/api/video-playlist.ts
+++ b/server/controllers/api/video-playlist.ts
@@ -292,7 +292,7 @@ async function addVideoInPlaylist (req: express.Request, res: express.Response)
       videoId: video.id
     }, { transaction: t })
 
-    videoPlaylist.updatedAt = new Date()
+    videoPlaylist.changed('updatedAt', true)
     await videoPlaylist.save({ transaction: t })
 
     await sendUpdateVideoPlaylist(videoPlaylist, t)
@@ -332,7 +332,7 @@ async function updateVideoPlaylistElement (req: express.Request, res: express.Re
 
     const element = await videoPlaylistElement.save({ transaction: t })
 
-    videoPlaylist.updatedAt = new Date()
+    videoPlaylist.changed('updatedAt', true)
     await videoPlaylist.save({ transaction: t })
 
     await sendUpdateVideoPlaylist(videoPlaylist, t)
@@ -356,7 +356,7 @@ async function removeVideoFromPlaylist (req: express.Request, res: express.Respo
     // Decrease position of the next elements
     await VideoPlaylistElementModel.increasePositionOf(videoPlaylist.id, positionToDelete, null, -1, t)
 
-    videoPlaylist.updatedAt = new Date()
+    videoPlaylist.changed('updatedAt', true)
     await videoPlaylist.save({ transaction: t })
 
     await sendUpdateVideoPlaylist(videoPlaylist, t)
@@ -401,7 +401,7 @@ async function reorderVideosPlaylist (req: express.Request, res: express.Respons
     // Decrease positions of elements after the old position of our ordered elements (decrease)
     await VideoPlaylistElementModel.increasePositionOf(videoPlaylist.id, oldPosition, null, -reorderLength, t)
 
-    videoPlaylist.updatedAt = new Date()
+    videoPlaylist.changed('updatedAt', true)
     await videoPlaylist.save({ transaction: t })
 
     await sendUpdateVideoPlaylist(videoPlaylist, t)
diff --git a/server/tests/api/videos/video-playlists.ts b/server/tests/api/videos/video-playlists.ts
index 931491406..358a064ff 100644
--- a/server/tests/api/videos/video-playlists.ts
+++ b/server/tests/api/videos/video-playlists.ts
@@ -664,6 +664,37 @@ describe('Test video playlists', function () {
     expect(obj[43000]).to.have.lengthOf(0)
   })
 
+  it('Should automatically update updatedAt field of playlists', async function () {
+    const server = servers[1]
+    const videoId = servers[1].videos[5].id
+
+    async function getPlaylistNames () {
+      const res = await getAccountPlaylistsListWithToken(server.url, server.accessToken, 'root', 0, 5, undefined, '-updatedAt')
+
+      return (res.body.data as VideoPlaylist[]).map(p => p.displayName)
+    }
+
+    const elementAttrs = { videoId }
+    await addVideoInPlaylist({ url: server.url, token: server.accessToken, playlistId: playlistServer2Id1, elementAttrs })
+    await addVideoInPlaylist({ url: server.url, token: server.accessToken, playlistId: playlistServer2Id2, elementAttrs })
+
+    const names1 = await getPlaylistNames()
+    expect(names1[0]).to.equal('playlist 3 updated')
+    expect(names1[1]).to.equal('playlist 2')
+
+    await removeVideoFromPlaylist({ url: server.url, token: server.accessToken, playlistId: playlistServer2Id1, videoId })
+
+    const names2 = await getPlaylistNames()
+    expect(names2[0]).to.equal('playlist 2')
+    expect(names2[1]).to.equal('playlist 3 updated')
+
+    await removeVideoFromPlaylist({ url: server.url, token: server.accessToken, playlistId: playlistServer2Id2, videoId })
+
+    const names3 = await getPlaylistNames()
+    expect(names3[0]).to.equal('playlist 3 updated')
+    expect(names3[1]).to.equal('playlist 2')
+  })
+
   it('Should delete some elements', async function () {
     this.timeout(30000)