try update

dao/persondao.js

@@ -21,4 +21,21 @@ module.exports = class PersonDao extends Dao {
       callback
     );
   }
+
+  updateOne(id, json, callback) {
+    var val = [json.navn, json.adresse, json.alder, id];
+    super.query(
+      "UPDATE person SET navn=?, adresse=?, alder=? WHERE id=?",
+      val,
+      callback
+    );
+  }
+
+  deleteOne(id, callback) {
+    super.query(
+      "DELETE FROM person WHERE id=?",
+      [id],
+      callback
+    );
+  }
 };

dao/persondao.test.js

@@ -77,3 +77,32 @@ test("get all persons from db", done => {
 
   personDao.getAll(callback);
 });
+
+
+test("update person from db", done => {
+  function callback(status, data) {
+    console.log(
+      "Test callback: status=" + status + ", data.length=" + JSON.stringify(data)
+    );
+    expect(data.affectedRows).toBeGreaterThanOrEqual(1);
+    done();
+  }
+
+  personDao.updateOne(
+    1,
+    {navn: "Hei Annnen", alder: 2, adresse: "Gata 4"},
+    callback
+  );
+});
+
+test("delete person from db", done => {
+  function callback(status, data) {
+    console.log(
+      "Test callback: status=" + status + ", data.length=" + JSON.stringify(data)
+    );
+    expect(data.affectedRows).toBeGreaterThanOrEqual(1);
+    done();
+  }
+
+  personDao.deleteOne(3, callback);
+});

server.js

@@ -41,4 +41,20 @@ app.post("/person", (req, res) => {
   });
 });
 
+app.put("/person/:personId", (req, res) => {
+  console.log("Fikk PUT-request fra klienten");
+  personDao.updateOne(req.params.personId, req.body, (status, data) => {
+    res.status(status);
+    res.json(data);
+  });
+});
+
+app.delete("/person/:personId", (req, res) => {
+  console.log("Fikk DELETE-request fra klienten");
+  personDao.deleteOne(req.params.personId, (status, data) => {
+    res.status(status);
+    res.json(data);
+  });
+});
+
 var server = app.listen(8080);