forum

backend/community/serializers.py

@@ -1,5 +1,5 @@
 from rest_framework import serializers
-from .models import Activity, ActivitySignup, Topic, Reply, TopicMedia
+from .models import Activity, ActivitySignup, Topic, Reply, TopicMedia, Announcement
 from shop.serializers import WeChatUserSerializer, ESP32ConfigSerializer, ServiceSerializer, VCCourseSerializer
 
 class ActivitySerializer(serializers.ModelSerializer):
@@ -16,9 +16,16 @@ class ActivitySignupSerializer(serializers.ModelSerializer):
         read_only_fields = ['signup_time', 'status']
 
 class TopicMediaSerializer(serializers.ModelSerializer):
+    url = serializers.SerializerMethodField()
+
     class Meta:
         model = TopicMedia
-        fields = ['id', 'file', 'media_type', 'created_at']
+        fields = ['id', 'file', 'file_url', 'url', 'media_type', 'created_at']
+
+    def get_url(self, obj):
+        if obj.file:
+            return obj.file.url
+        return obj.file_url
 
 class ReplySerializer(serializers.ModelSerializer):
     author_info = WeChatUserSerializer(source='author', read_only=True)
@@ -27,6 +34,7 @@ class ReplySerializer(serializers.ModelSerializer):
     class Meta:
         model = Reply
         fields = ['id', 'topic', 'content', 'author', 'author_info', 'reply_to', 'media', 'created_at']
+        read_only_fields = ['author', 'created_at']
 
 class TopicSerializer(serializers.ModelSerializer):
     author_info = WeChatUserSerializer(source='author', read_only=True)
@@ -38,6 +46,12 @@ class TopicSerializer(serializers.ModelSerializer):
     service_info = ServiceSerializer(source='related_service', read_only=True)
     course_info = VCCourseSerializer(source='related_course', read_only=True)
 
+    media_ids = serializers.ListField(
+        child=serializers.IntegerField(), 
+        write_only=True, 
+        required=False
+    )
+
     class Meta:
         model = Topic
         fields = [
@@ -46,6 +60,20 @@ class TopicSerializer(serializers.ModelSerializer):
             'related_service', 'service_info',
             'related_course', 'course_info',
             'view_count', 'is_pinned', 'created_at', 'updated_at', 
-            'is_verified_owner', 'replies', 'media'
+            'is_verified_owner', 'replies', 'media', 'media_ids'
         ]
-        read_only_fields = ['view_count', 'created_at', 'updated_at', 'is_verified_owner']
+        read_only_fields = ['author', 'view_count', 'created_at', 'updated_at', 'is_verified_owner']
+
+    def create(self, validated_data):
+        media_ids = validated_data.pop('media_ids', [])
+        topic = super().create(validated_data)
+        if media_ids:
+            TopicMedia.objects.filter(id__in=media_ids).update(topic=topic)
+        return topic
+
+class AnnouncementSerializer(serializers.ModelSerializer):
+    display_image_url = serializers.ReadOnlyField()
+
+    class Meta:
+        model = Announcement
+        fields = '__all__'