Multi tenant DB, registratie per huishouden V1.2

database/migrate.js

@@ -210,5 +210,23 @@ CREATE TABLE IF NOT EXISTS product_stores (
 
 `);
 
+const addColumnIfMissing = (table, column, definition) => {
+    const columns = db.prepare(`PRAGMA table_info(${table})`).all();
+    if (!columns.some(existing => existing.name === column)) {
+        db.exec(`ALTER TABLE ${table} ADD COLUMN ${column} ${definition}`);
+    }
+};
+
+addColumnIfMissing("categories", "household_id", "INTEGER REFERENCES households(id)");
+addColumnIfMissing("products", "household_id", "INTEGER REFERENCES households(id)");
+
+const defaultHousehold = db.prepare("SELECT id FROM households ORDER BY id LIMIT 1").get();
+if (defaultHousehold) {
+    db.prepare("UPDATE categories SET household_id = ? WHERE household_id IS NULL")
+        .run(defaultHousehold.id);
+    db.prepare("UPDATE products SET household_id = ? WHERE household_id IS NULL")
+        .run(defaultHousehold.id);
+}
+
 
 console.log("Database migratie voltooid.");