Teams must send their motivation letter

apps/participation/models.py

@@ -20,6 +20,10 @@ from tfjm.lists import get_sympa_client
 from tfjm.matrix import Matrix, RoomPreset, RoomVisibility
 
 
+def get_motivation_letter_filename(instance, filename):
+    return f"authorization/motivation_letters/motivation_letter_{instance.trigram}"
+
+
 class Team(models.Model):
     """
     The Team model represents a real team that participates to the TFJM².
@@ -45,6 +49,13 @@ class Team(models.Model):
         help_text=_("The access code let other people to join the team."),
     )
 
+    motivation_letter = models.FileField(
+        verbose_name=_("motivation letter"),
+        upload_to=get_motivation_letter_filename,
+        blank=True,
+        default="",
+    )
+
     @property
     def students(self):
         return self.participants.filter(studentregistration__isnull=False)