From 5027abecd1e5e511064de75fb5248139e1c8fe23 Mon Sep 17 00:00:00 2001 From: Claire Date: Thu, 18 Mar 2021 00:41:32 +0100 Subject: Fix cache_collection crashing when given an empty collection (#15921) * Fix cache_collection crashing when given an empty collection * Add tests --- app/controllers/concerns/cache_concern.rb | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'app/controllers/concerns') diff --git a/app/controllers/concerns/cache_concern.rb b/app/controllers/concerns/cache_concern.rb index 3fb4b962a..05e431b19 100644 --- a/app/controllers/concerns/cache_concern.rb +++ b/app/controllers/concerns/cache_concern.rb @@ -31,7 +31,9 @@ module CacheConcern def cache_collection(raw, klass) return raw unless klass.respond_to?(:with_includes) - raw = raw.cache_ids.to_a if raw.is_a?(ActiveRecord::Relation) + raw = raw.cache_ids.to_a if raw.is_a?(ActiveRecord::Relation) + return [] if raw.empty? + cached_keys_with_value = Rails.cache.read_multi(*raw).transform_keys(&:id) uncached_ids = raw.map(&:id) - cached_keys_with_value.keys -- cgit