Enable registration form

apps/registration/models.py

@@ -10,14 +10,6 @@ class Registration(PolymorphicModel):
         verbose_name=_("user"),
     )
 
-    team = models.ForeignKey(
-        "participation.Team",
-        on_delete=models.PROTECT,
-        null=True,
-        default=None,
-        verbose_name=_("team"),
-    )
-
     give_contact_to_animath = models.BooleanField(
         default=False,
         verbose_name=_("Grant Animath to contact me in the future about other actions"),
@@ -37,6 +29,15 @@ class Registration(PolymorphicModel):
 
 
 class StudentRegistration(Registration):
+    team = models.ForeignKey(
+        "participation.Team",
+        related_name="students",
+        on_delete=models.PROTECT,
+        null=True,
+        default=None,
+        verbose_name=_("team"),
+    )
+
     student_class = models.IntegerField(
         choices=[
             (12, _("12th grade")),
@@ -61,6 +62,15 @@ class StudentRegistration(Registration):
 
 
 class CoachRegistration(Registration):
+    team = models.ForeignKey(
+        "participation.Team",
+        related_name="coachs",
+        on_delete=models.PROTECT,
+        null=True,
+        default=None,
+        verbose_name=_("team"),
+    )
+
     professional_activity = models.TextField(
         verbose_name=_("professional activity"),
     )