Default to current user on timer POST (#134)

api/serializers.py

@@ -135,13 +135,24 @@ class TimerSerializer(CoreModelSerializer):
     child = serializers.PrimaryKeyRelatedField(
         allow_null=True, allow_empty=True, queryset=models.Child.objects.all(),
         required=False)
-    user = serializers.PrimaryKeyRelatedField(queryset=User.objects.all())
+    user = serializers.PrimaryKeyRelatedField(
+        allow_null=True, allow_empty=True, queryset=User.objects.all(),
+        required=False)
 
     class Meta:
         model = models.Timer
         fields = ('id', 'child', 'name', 'start', 'end', 'duration', 'active',
                   'user')
 
+    def validate(self, attrs):
+        attrs = super(TimerSerializer, self).validate(attrs)
+
+        # Set user to current user if no value is provided.
+        if 'user' not in attrs or attrs['user'] is None:
+            attrs['user'] = self.context['request'].user
+
+        return attrs
+
 
 class TummyTimeSerializer(CoreModelWithDurationSerializer):
     class Meta(CoreModelWithDurationSerializer.Meta):

api/tests.py

@@ -368,6 +368,13 @@ def test_post(self):
         obj = models.Timer.objects.get(pk=response.data['id'])
         self.assertEqual(obj.name, data['name'])
 
+    def test_post_default_user(self):
+        user = User.objects.first()
+        response = self.client.post(self.endpoint)
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+        obj = models.Timer.objects.get(pk=response.data['id'])
+        self.assertEqual(obj.user, user)
+
     def test_patch(self):
         endpoint = '{}{}/'.format(self.endpoint, 1)
         response = self.client.get(endpoint)