Use relative urls in publication file field

Author: mmihalik

competition/models.py

@@ -736,7 +736,7 @@ class Meta:
     event = models.ForeignKey(Event, null=True, on_delete=models.SET_NULL)
 
     file = RestrictedFileField(
-        upload_to='publications/%Y',
+        upload_to='publications/%Y/',
         content_types=['application/pdf', 'application/zip'],
         verbose_name='súbor')
 

competition/serializers.py

@@ -42,6 +42,9 @@ class Meta:
         model = models.Publication
         fields = '__all__'
 
+    def __init__(self, instance=None, data=..., **kwargs):
+        super().__init__(instance, data, **kwargs)
+
     def get_verbose_name(self, obj):
         return str(obj)