From f1f1e0df5a601b125d9bb64447a8b6e39cf6672d Mon Sep 17 00:00:00 2001
From: jeremygan2021 <jeremygan2021@gmail.com>
Date: Mon, 23 Mar 2026 00:15:21 +0800
Subject: [PATCH] debug4

---
 .../migrations/0013_projectfile_file_size.py   | 18 ++++++++++++++++++
 backend/competition/models.py                  |  1 +
 backend/competition/serializers.py             | 18 +++++++++++++++++-
 3 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 backend/competition/migrations/0013_projectfile_file_size.py

diff --git a/backend/competition/migrations/0013_projectfile_file_size.py b/backend/competition/migrations/0013_projectfile_file_size.py
new file mode 100644
index 0000000..702cab6
--- /dev/null
+++ b/backend/competition/migrations/0013_projectfile_file_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-03-22 16:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('competition', '0012_alter_competition_cover_image_url_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='projectfile',
+            name='file_size',
+            field=models.BigIntegerField(blank=True, null=True, verbose_name='文件大小(字节)'),
+        ),
+    ]
diff --git a/backend/competition/models.py b/backend/competition/models.py
index 61ee049..05c3fd8 100644
--- a/backend/competition/models.py
+++ b/backend/competition/models.py
@@ -297,6 +297,7 @@ class ProjectFile(models.Model):
     
     file = models.FileField(upload_to='competitions/projects/files/', verbose_name="文件", null=True, blank=True)
     file_url = models.TextField(verbose_name="文件链接", null=True, blank=True, help_text="OSS URL或外部链接")
+    file_size = models.BigIntegerField(verbose_name="文件大小(字节)", null=True, blank=True)
     
     name = models.CharField(max_length=100, verbose_name="文件名称", blank=True)
     
diff --git a/backend/competition/serializers.py b/backend/competition/serializers.py
index 219403b..061f062 100644
--- a/backend/competition/serializers.py
+++ b/backend/competition/serializers.py
@@ -39,15 +39,29 @@ class CompetitionEnrollmentSerializer(serializers.ModelSerializer):
 
 class ProjectFileSerializer(serializers.ModelSerializer):
     file_url_display = serializers.SerializerMethodField()
+    file_size_display = serializers.SerializerMethodField()
     
     class Meta:
         model = ProjectFile
-        fields = ['id', 'project', 'file_type', 'file', 'file_url', 'name', 'created_at', 'file_url_display']
+        fields = ['id', 'project', 'file_type', 'file', 'file_url', 'file_size', 'name', 'created_at', 'file_url_display', 'file_size_display']
 
     def get_file_url_display(self, obj):
         if obj.file:
             return obj.file.url
         return obj.file_url
+    
+    def get_file_size_display(self, obj):
+        if not obj.file_size:
+            return None
+        size = obj.file_size
+        if size < 1024:
+            return f"{size} B"
+        elif size < 1024 * 1024:
+            return f"{size / 1024:.1f} KB"
+        elif size < 1024 * 1024 * 1024:
+            return f"{size / (1024 * 1024):.1f} MB"
+        else:
+            return f"{size / (1024 * 1024 * 1024):.2f} GB"
 
     def validate_file(self, value):
         if not value:
@@ -87,6 +101,8 @@ class ProjectFileSerializer(serializers.ModelSerializer):
             if not validated_data.get('name'):
                 validated_data['name'] = file_obj.name
             
+            validated_data['file_size'] = file_obj.size
+            
             try:
                 from ai_services.services import AliyunTingwuService
                 service = AliyunTingwuService()