Add & join teams

apps/tournament/forms.py

@@ -43,6 +43,16 @@ class JoinTeam(forms.Form):
         max_length=6,
     )
 
+    def clean(self):
+        cleaned_data = super().clean()
+
+        team = Team.objects.filter(access_code=cleaned_data["access_code"])
+        if not team.exists():
+            self.add_error('access_code', _("This access code is invalid."))
+        cleaned_data["team"] = team.get()
+
+        return cleaned_data
+
 
 class SolutionForm(forms.ModelForm):
     problem = forms.ChoiceField(