API: Add barcodes to participants

This commit adds participants' checkin barcodes to the participants'
list and detail endpoints to allow for them to be easily exported
without needing to make one request per participant.

This field is private, and currently read-only, but can be opened up.

It also fixes the type for the barcode in the main checkin serializer,
as barcodes are strings rather than numbers (e.g. allowing "000001").

tabbycat/api/serializers.py

@@ -63,7 +63,7 @@ class V1LinksSerializer(serializers.Serializer):
 
 class CheckinSerializer(serializers.Serializer):
     object = serializers.HyperlinkedIdentityField(view_name='api-root')
-    barcode = serializers.IntegerField()
+    barcode = serializers.CharField()
     checked = serializers.BooleanField()
     timestamp = serializers.DateTimeField()
 
@@ -456,6 +456,7 @@ class SpeakerLinksSerializer(serializers.Serializer):
         queryset=SpeakerCategory.objects.all(),
     )
     _links = SpeakerLinksSerializer(source='*', read_only=True)
+    barcode = serializers.CharField(source='checkin_identifier.barcode', read_only=True)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -465,6 +466,7 @@ def __init__(self, *args, **kwargs):
             self.fields.pop('phone')
             self.fields.pop('pronoun')
             self.fields.pop('url_key')
+            self.fields.pop('barcode')
 
             if kwargs['context']['tournament'].pref('participant_code_names') == 'everywhere':
                 self.fields.pop('name')
@@ -519,6 +521,7 @@ class AdjudicatorLinksSerializer(serializers.Serializer):
     )
     venue_constraints = VenueConstraintSerializer(many=True, required=False)
     _links = AdjudicatorLinksSerializer(source='*', read_only=True)
+    barcode = serializers.CharField(source='checkin_identifier.barcode', read_only=True)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -545,6 +548,7 @@ def __init__(self, *args, **kwargs):
             self.fields.pop('phone')
             self.fields.pop('pronoun')
             self.fields.pop('url_key')
+            self.fields.pop('barcode')
 
     class Meta:
         model = Adjudicator

tabbycat/api/views.py

@@ -330,7 +330,7 @@ def get_queryset(self):
         return super().get_queryset().select_related('tournament').prefetch_related(
             Prefetch(
                 'speaker_set',
-                queryset=Speaker.objects.all().prefetch_related(category_prefetch).select_related('team__tournament'),
+                queryset=Speaker.objects.all().prefetch_related(category_prefetch).select_related('team__tournament', 'checkin_identifier'),
             ),
             'institution_conflicts', 'venue_constraints__category__tournament',
             'break_categories', 'break_categories__tournament',
@@ -360,7 +360,7 @@ def get_queryset(self):
         if self.request.query_params.get('break') and self.get_break_permission():
             filters &= Q(breaking=True)
 
-        return super().get_queryset().prefetch_related(
+        return super().get_queryset().select_related('checkin_identifier').prefetch_related(
             'team_conflicts', 'team_conflicts__tournament',
             'adjudicator_conflicts', 'adjudicator_conflicts__tournament',
             'institution_conflicts', 'venue_constraints__category__tournament',
@@ -410,7 +410,7 @@ def get_queryset(self):
         if not self.request.user or not self.request.user.is_staff:
             category_prefetch.queryset = category_prefetch.queryset.filter(public=True)
 
-        return super().get_queryset().prefetch_related(category_prefetch)
+        return super().get_queryset().select_related('checkin_identifier').prefetch_related(category_prefetch)
 
 
 @extend_schema(tags=['venues'], parameters=[tournament_parameter])