Added update and delete

dao/persondao.js

@@ -21,4 +21,21 @@ module.exports = class PersonDao extends Dao {
       callback
     );
   }
+
+  updateOne(json, callback) {
+    var val = [json.navn, json.adresse, json.alder];
+    super.query(
+        "update person set (navn, adresse, alder) = (?,?,?)",
+        val,
+        callback
+    );
+  }
+
+  deleteOne(id, callback) {
+    super.query(
+        "delete from person where id=?",
+        [id],
+        callback
+    );
+  }
 };