From 32f87d251e7150573fe3a9c2336ea75815246224 Mon Sep 17 00:00:00 2001
From: Tim Diggins <tim@red56.uk>
Date: Mon, 8 Jan 2024 12:19:32 +0000
Subject: [PATCH] stop exception when index is exotic and columns is a string

---
 lib/lol_dba/index_finding/index_finder.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/lol_dba/index_finding/index_finder.rb b/lib/lol_dba/index_finding/index_finder.rb
index a9c9f78..669f249 100644
--- a/lib/lol_dba/index_finding/index_finder.rb
+++ b/lib/lol_dba/index_finding/index_finder.rb
@@ -58,7 +58,12 @@ def self.existing_indexes(table_name)
     def self.table_indexes(table_name)
       indexes = ActiveRecord::Base.connection.indexes(table_name.to_sym)
       indexes.collect do |index|
-        index.columns.size > 1 ? index.columns.sort : index.columns.first
+        if index.columns.is_a?(String)
+          # eg. gin, tsvector...
+          index.columns
+        else
+          index.columns.size > 1 ? index.columns.sort : index.columns.first
+        end
       end
     end