Technical notes on real production problems: application security, spatial SQL, RTL i18n, operations.https://ddlt-solutions.com/enhttps://ddlt-solutions.com/en/journal/affectation-zone-requete-spatiale/https://ddlt-solutions.com/en/journal/affectation-zone-requete-spatiale/On a map administered by several people, asking a human which zone a point sits in guarantees that one day the map and the database will stop agreeing. The geometry already knows the answer.Tue, 08 Sep 2026 00:00:00 GMTGISSpatial SQLMySQLGeoJSONhttps://ddlt-solutions.com/en/journal/idor-back-office-multi-tenant/https://ddlt-solutions.com/en/journal/idor-back-office-multi-tenant/One manager could read another venue's unpublished drafts by changing a digit in the URL. The flaw was not in the authorisation code: it was in its absence on a single route, and no test could have caught it.Thu, 20 Aug 2026 00:00:00 GMTsecurityaccess controlmulti-tenantIDOR