[MM-29217] Remove Posts.ParentId (#17923)

app/post_test.go

@@ -346,7 +346,6 @@ func TestPostReplyToPostWhereRootPosterLeftChannel(t *testing.T) {
 		Message:       "asd",
 		ChannelId:     channel.Id,
 		RootId:        rootPost.Id,
-		ParentId:      rootPost.Id,
 		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
 		UserId:        userInChannel.Id,
 		CreateAt:      0,
@@ -368,7 +367,6 @@ func TestPostAttachPostToChildPost(t *testing.T) {
 		Message:       "reply one",
 		ChannelId:     channel.Id,
 		RootId:        rootPost.Id,
-		ParentId:      rootPost.Id,
 		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
 		UserId:        user.Id,
 		CreateAt:      0,
@@ -381,7 +379,6 @@ func TestPostAttachPostToChildPost(t *testing.T) {
 		Message:       "reply two",
 		ChannelId:     channel.Id,
 		RootId:        res1.Id,
-		ParentId:      res1.Id,
 		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
 		UserId:        user.Id,
 		CreateAt:      0,
@@ -394,7 +391,6 @@ func TestPostAttachPostToChildPost(t *testing.T) {
 		Message:       "reply three",
 		ChannelId:     channel.Id,
 		RootId:        rootPost.Id,
-		ParentId:      rootPost.Id,
 		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
 		UserId:        user.Id,
 		CreateAt:      0,
@@ -2313,7 +2309,6 @@ func TestReplyToPostWithLag(t *testing.T) {
 			UserId:    th.BasicUser2.Id,
 			ChannelId: th.BasicChannel.Id,
 			RootId:    root.Id,
-			ParentId:  root.Id,
 			Message:   fmt.Sprintf("@%s", th.BasicUser2.Username),
 		}, th.BasicChannel, false, true)
 		require.Nil(t, appErr)