include channels details in subscription serializer

apps/api/serializers.py

@@ -171,16 +171,37 @@ class UniqueContentRuleSerializer(DynamicModelSerializer):
         fields = ("id", "name", "value")
 
 
+class DiscordChannelField(serializers.PrimaryKeyRelatedField):
+    def to_internal_value(self, data):
+        try:
+            data = int(data)
+        except (TypeError, ValueError):
+            self.fail("invalid", pk_value=data)
+
+        return super().to_internal_value(data)
+
+    def to_representation(self, value):
+        return str(value.pk)
+
+
+class NestedDiscordChannelSerializer(DynamicModelSerializer):
+
+    class Meta:
+        model = DiscordChannel
+        fields = ("id", "name", "is_nsfw")
+
+
 class SubscriptionSerializer(DynamicModelSerializer):
     filters = serializers.PrimaryKeyRelatedField(
         queryset=ContentFilter.objects.all(),
         many=True
     )
-    channels = serializers.PrimaryKeyRelatedField(
+    channels =  DiscordChannelField(
         queryset=DiscordChannel.objects.all(),
         many=True
     )
-    #  unique_rules = UniqueContentRuleSerializer(many=True)  # TODO: solve? causes issues with submission.
+    channels_detail = serializers.SerializerMethodField()
+    #  unique_rules = UniqueContentRuleSerializ er(many=True)  # TODO: solve? causes issues with submission.
 
     class Meta:
         model = Subscription
@@ -195,11 +216,18 @@ class SubscriptionSerializer(DynamicModelSerializer):
             "active",
             "publish_threshold",
             "channels",
+            "channels_detail",
             "filters",
             "message_style",
             "unique_rules"
         )
 
+    def get_channels_detail(self, obj: Subscription):
+        request = self.context.get("request")
+        if request.method == "GET":
+            return NestedDiscordChannelSerializer(obj.channels.all(), many=True).data
+        return []
+
     def validate(self, data):
         server = data.get("server") or self.context.get("server")
         if not server: