Adding forum sort for post_aggregates. Fixes #1312 (#1400)

* Adding forum sort for post_aggregates. Fixes #1312

* Changing sort name from forum to MostComments.

crates/db_queries/src/lib.rs

@@ -164,6 +164,7 @@ pub enum SortType {
   TopMonth,
   TopYear,
   TopAll,
+  MostComments,
 }
 
 #[derive(EnumString, ToString, Debug, Serialize, Deserialize, Clone)]

crates/db_views/src/comment_view.rs

@@ -380,7 +380,7 @@ impl<'a> CommentQueryBuilder<'a> {
       SortType::Hot | SortType::Active => query
         .order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
         .then_order_by(comment_aggregates::published.desc()),
-      SortType::New => query.order_by(comment::published.desc()),
+      SortType::New | SortType::MostComments => query.order_by(comment::published.desc()),
       SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
       SortType::TopYear => query
         .filter(comment::published.gt(now - 1.years()))

crates/db_views/src/post_view.rs

@@ -363,6 +363,7 @@ impl<'a> PostQueryBuilder<'a> {
         .then_order_by(hot_rank(post_aggregates::score, post_aggregates::published).desc())
         .then_order_by(post_aggregates::published.desc()),
       SortType::New => query.then_order_by(post_aggregates::published.desc()),
+      SortType::MostComments => query.then_order_by(post_aggregates::comments.desc()),
       SortType::TopAll => query.then_order_by(post_aggregates::score.desc()),
       SortType::TopYear => query
         .filter(post::published.gt(now - 1.years()))

crates/db_views_actor/src/user_mention_view.rs

@@ -270,7 +270,7 @@ impl<'a> UserMentionQueryBuilder<'a> {
       SortType::Hot | SortType::Active => query
         .order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
         .then_order_by(comment_aggregates::published.desc()),
-      SortType::New => query.order_by(comment::published.desc()),
+      SortType::New | SortType::MostComments => query.order_by(comment::published.desc()),
       SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
       SortType::TopYear => query
         .filter(comment::published.gt(now - 1.years()))

crates/db_views_actor/src/user_view.rs

@@ -110,7 +110,7 @@ impl<'a> UserQueryBuilder<'a> {
       SortType::Active => query
         .order_by(user_aggregates::comment_score.desc())
         .then_order_by(user_::published.desc()),
-      SortType::New => query.order_by(user_::published.desc()),
+      SortType::New | SortType::MostComments => query.order_by(user_::published.desc()),
       SortType::TopAll => query.order_by(user_aggregates::comment_score.desc()),
       SortType::TopYear => query
         .filter(user_::published.gt(now - 1.years()))

migrations/2021-01-31-050334_add_forum_sort_index/down.sql

@@ -0,0 +1 @@
+drop index idx_post_aggregates_comments;

migrations/2021-01-31-050334_add_forum_sort_index/up.sql

@@ -0,0 +1 @@
+create index idx_post_aggregates_comments on post_aggregates (comments desc);