Add a new migration script to fix the previous one

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

advanced/Scripts/database_migration/gravity-db.sh

@@ -80,4 +80,11 @@ upgrade_gravityDB(){
 		sqlite3 "${database}" < "${scriptPath}/7_to_8.sql"
 		version=8
 	fi
+	if [[ "$version" == "8" ]]; then
+		# This migration fixes some issues that were introduced
+		# in the previous migration script.
+		echo -e "  ${INFO} Upgrading gravity database from version 8 to 9"
+		sqlite3 "${database}" < "${scriptPath}/8_to_9.sql"
+		version=9
+	fi
 }

advanced/Scripts/database_migration/gravity/8_to_9.sql

@@ -0,0 +1,26 @@
+.timeout 30000
+
+PRAGMA FOREIGN_KEYS=OFF;
+
+BEGIN TRANSACTION;
+
+DROP TRIGGER IF EXISTS tr_group_update;
+DROP TRIGGER IF EXISTS tr_group_zero;
+
+PRAGMA legacy_alter_table=ON;
+ALTER TABLE "group" RENAME TO "group__";
+PRAGMA legacy_alter_table=OFF;
+ALTER TABLE "group__" RENAME TO "group";
+
+CREATE TRIGGER tr_group_update AFTER UPDATE ON "group"
+    BEGIN
+      UPDATE "group" SET date_modified = (cast(strftime('%s', 'now') as int)) WHERE id = NEW.id;
+    END;
+
+CREATE TRIGGER tr_group_zero AFTER DELETE ON "group"
+    BEGIN
+      INSERT OR IGNORE INTO "group" (id,enabled,name) VALUES (0,1,'Unassociated');
+    END;
+
+
+COMMIT;