Removed pagination from AutocompleteUsersFinder

The frontend code doesn't use this so there's no practical point in
supporting this. We also hardcode the limit to 20 so users can no longer
request their own limit, which could overload the database (depending on
any upper bounds perhaps enforced by Kaminari).

1 files changed, 8 insertions, 4 deletions

diff --git a/app/finders/autocomplete_users_finder.rb b/app/finders/autocomplete_users_finder.rb
index 3f10727be8c..49eb6af8f11 100644
--- a/app/finders/autocomplete_users_finder.rb
+++ b/app/finders/autocomplete_users_finder.rb
@@ -1,6 +1,12 @@
 class AutocompleteUsersFinder
+  # The number of users to display in the results is hardcoded to 20, and
+  # pagination is not supported. This ensures that performance remains
+  # consistent and removes the need for implementing keyset pagination to ensure
+  # good performance.
+  LIMIT = 20
+
   attr_reader :current_user, :project, :group, :search, :skip_users,
-              :page, :per_page, :author_id, :params
+              :author_id, :params
 
   def initialize(params:, current_user:, project:, group:)
     @current_user = current_user
@@ -8,8 +14,6 @@ class AutocompleteUsersFinder
     @group = group
     @search = params[:search]
     @skip_users = params[:skip_users]
-    @page = params[:page]
-    @per_page = params[:per_page]
     @author_id = params[:author_id]
     @params = params
   end
@@ -20,7 +24,7 @@ class AutocompleteUsersFinder
     items = items.reorder(:name)
     items = items.search(search) if search.present?
     items = items.where.not(id: skip_users) if skip_users.present?
-    items = items.page(page).per(per_page)
+    items = items.limit(LIMIT)
 
     if params[:todo_filter].present? && current_user
       items = items.todo_authors(current_user.id, params[:todo_state_filter])