From a77a6a137f98703947f8049e731f54b8ac8a8f29 Mon Sep 17 00:00:00 2001
From: Yohan Boniface <yohanboniface@free.fr>
Date: Tue, 21 Nov 2023 10:40:55 +0100
Subject: [PATCH] Update search index command in documentation

Sadly, when using a SearchVector, Django will introduce a COALESCE
that will then prevent our index to be used. So we need to add
this COALESCE in the index to make psql happy.

fix #1414
---
 docs/install.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/install.md b/docs/install.md
index bf789e08..fb087f2c 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -108,7 +108,7 @@ may want to add an index. For that, you should do so:
     ALTER TEXT SEARCH CONFIGURATION umapdict ALTER MAPPING FOR hword, hword_part, word WITH unaccent, simple;
 
     # Now create the index
-    CREATE INDEX IF NOT EXISTS search_idx ON umap_map USING GIN(to_tsvector('umapdict', name), share_status);
+    CREATE INDEX IF NOT EXISTS search_idx ON umap_map USING GIN(to_tsvector('umapdict', COALESCE(name, ''::character varying)::text), share_status);
 
 And change `UMAP_SEARCH_CONFIGURATION = "umapdict"` in your settings.