Fix ImageFields

aleksis/core/models.py

@@ -201,7 +201,7 @@ class Person(ExtensibleModel):
     place_of_birth = models.CharField(verbose_name=_("Place of birth"), max_length=255, blank=True)
     sex = models.CharField(verbose_name=_("Sex"), max_length=1, choices=SEX_CHOICES, blank=True)
 
-    photo = ImageField(
+    photo = models.ImageField(
         verbose_name=_("Photo"),
         blank=True,
         null=True,
@@ -492,7 +492,7 @@ class Group(SchoolTermRelatedExtensibleModel):
         AdditionalField, verbose_name=_("Additional fields"), blank=True
     )
 
-    photo = ImageField(
+    photo = models.ImageField(
         verbose_name=_("Photo"),
         blank=True,
         null=True,