1 files changed, 5 insertions, 6 deletions
diff --git a/app/models/integrations/youtrack.rb b/app/models/integrations/youtrack.rb
index fa719f925ed..15246a37aa7 100644
--- a/app/models/integrations/youtrack.rb
+++ b/app/models/integrations/youtrack.rb
@@ -7,12 +7,11 @@ module Integrations
     validates :project_url, :issues_url, presence: true, public_url: true, if: :activated?
 
     # {PROJECT-KEY}-{NUMBER} Examples: YT-1, PRJ-1, gl-030
-    def self.reference_pattern(only_long: false)
-      if only_long
-        /(?<issue>\b[A-Za-z][A-Za-z0-9_]*-\d+\b)/
-      else
-        /(?<issue>\b[A-Za-z][A-Za-z0-9_]*-\d+\b)|(#{Issue.reference_prefix}#{Gitlab::Regex.issue})/
-      end
+    def reference_pattern(only_long: false)
+      return @reference_pattern if defined?(@reference_pattern)
+
+      regex_suffix = "|(#{Issue.reference_prefix}#{Gitlab::Regex.issue})"
+      @reference_pattern = /(?<issue>\b[A-Za-z][A-Za-z0-9_]*-\d+\b)#{regex_suffix if only_long}/
     end
 
     def title