From 9156d6cd9d9f6f0c94f1a350cc50559b6f6216df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9gis=20Hanol?= <regis@hanol.fr>
Date: Fri, 7 Aug 2015 16:30:30 +0200
Subject: [PATCH] FIX: only migrate SiteText to SiteCustomization if there are
 any

---
 ...migrate_site_text_to_site_customization.rb | 31 ++++++++++++-------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/db/migrate/20150112172259_migrate_site_text_to_site_customization.rb b/db/migrate/20150112172259_migrate_site_text_to_site_customization.rb
index 569f4b98b2a..4e3b18fe730 100644
--- a/db/migrate/20150112172259_migrate_site_text_to_site_customization.rb
+++ b/db/migrate/20150112172259_migrate_site_text_to_site_customization.rb
@@ -2,18 +2,25 @@ class MigrateSiteTextToSiteCustomization < ActiveRecord::Migration
 
   def up
     execute <<-SQL
-      INSERT INTO site_customizations
-        (name, user_id, enabled, key, created_at, updated_at, head_tag, body_tag)
-      VALUES (
-        'Migrated from Site Text',
-        -1,
-        't',
-        '#{SecureRandom.uuid}',
-        now(),
-        now(),
-        (SELECT value FROM site_texts WHERE text_type = 'head' LIMIT 1),
-        (SELECT value FROM site_texts WHERE text_type = 'bottom' LIMIT 1)
-      )
+      DO
+      $do$
+      BEGIN
+        IF EXISTS(SELECT 1 FROM site_texts WHERE (text_type = 'head' OR text_type = 'bottom')) THEN
+          INSERT INTO site_customizations (name, user_id, enabled, key, created_at, updated_at, head_tag, body_tag)
+          VALUES
+          (
+            'Migrated from Site Text',
+            -1,
+            't',
+            '#{SecureRandom.uuid}',
+            now(),
+            now(),
+            (SELECT value FROM site_texts WHERE text_type = 'head' LIMIT 1),
+            (SELECT value FROM site_texts WHERE text_type = 'bottom' LIMIT 1)
+          );
+        END IF;
+      END
+      $do$
     SQL
   end