From 9b3106fb32ee098cb8bf3a44c3f89be53f24dbfe Mon Sep 17 00:00:00 2001
From: Bernd Bestel <bernd@berrnd.de>
Date: Mon, 31 Aug 2020 19:54:31 +0200
Subject: [PATCH] Prevent empty userfields (cause warnings in tables after
 deleting a file)

---
 migrations/0112.sql | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 migrations/0112.sql

diff --git a/migrations/0112.sql b/migrations/0112.sql
new file mode 100644
index 00000000..71ff4ae5
--- /dev/null
+++ b/migrations/0112.sql
@@ -0,0 +1,16 @@
+DELETE FROM userfield_values
+WHERE IFNULL(value, '') = '';
+
+CREATE TRIGGER prevent_empty_userfields_INS AFTER INSERT ON userfield_values
+BEGIN
+	DELETE FROM userfield_values
+	WHERE id = NEW.id
+		AND IFNULL(value, '') = '';
+END;
+
+CREATE TRIGGER prevent_empty_userfields_UPD2 AFTER UPDATE ON userfield_values
+BEGIN
+	DELETE FROM userfield_values
+	WHERE id = NEW.id
+		AND IFNULL(value, '') = '';
+END;