初始提交：企业级日报系统完整代码

功能特性：
-  JWT用户认证系统
-  日报CRUD管理
-  三级权限控制
-  多维度搜索过滤
-  统计分析功能
-  评论互动系统
-  响应式Cool Admin界面
-  暗色主题支持

 技术栈：
- 后端：Django 4.2.7 + DRF + SimpleJWT
- 前端：Vue 3 + Element Plus + Pinia
- 数据库：SQLite/PostgreSQL
- 部署：Docker + Nginx

 包含内容：
- 完整的后端API代码
- 现代化前端界面
- 数据库迁移文件
- 部署脚本和文档
- 演示页面和测试工具

backend/daily_report/serializers.py

@@ -0,0 +1,131 @@
+from rest_framework import serializers
+from django.contrib.auth import get_user_model
+from .models import DailyReport, ReportComment
+
+User = get_user_model()
+
+
+class UserSimpleSerializer(serializers.ModelSerializer):
+    """用户简单信息序列化器"""
+    full_name = serializers.SerializerMethodField()
+    
+    class Meta:
+        model = User
+        fields = ('id', 'username', 'full_name', 'department', 'position')
+    
+    def get_full_name(self, obj):
+        return f'{obj.first_name} {obj.last_name}'.strip() or obj.username
+
+
+class ReportCommentSerializer(serializers.ModelSerializer):
+    """日报评论序列化器"""
+    user = UserSimpleSerializer(read_only=True)
+    
+    class Meta:
+        model = ReportComment
+        fields = ('id', 'user', 'content', 'created_at', 'updated_at')
+        read_only_fields = ('id', 'created_at', 'updated_at')
+    
+    def create(self, validated_data):
+        validated_data['user'] = self.context['request'].user
+        return super().create(validated_data)
+
+
+class DailyReportListSerializer(serializers.ModelSerializer):
+    """日报列表序列化器"""
+    user = UserSimpleSerializer(read_only=True)
+    work_summary_preview = serializers.ReadOnlyField()
+    next_day_plan_preview = serializers.ReadOnlyField()
+    comments_count = serializers.SerializerMethodField()
+    
+    class Meta:
+        model = DailyReport
+        fields = (
+            'id', 'user', 'work_summary_preview', 'next_day_plan_preview',
+            'report_date', 'created_at', 'updated_at', 'is_draft', 'comments_count'
+        )
+    
+    def get_comments_count(self, obj):
+        return obj.comments.count()
+
+
+class DailyReportDetailSerializer(serializers.ModelSerializer):
+    """日报详情序列化器"""
+    user = UserSimpleSerializer(read_only=True)
+    comments = ReportCommentSerializer(many=True, read_only=True)
+    can_edit = serializers.SerializerMethodField()
+    can_delete = serializers.SerializerMethodField()
+    
+    class Meta:
+        model = DailyReport
+        fields = (
+            'id', 'user', 'work_summary', 'next_day_plan', 'difficulties',
+            'suggestions', 'report_date', 'created_at', 'updated_at',
+            'is_draft', 'comments', 'can_edit', 'can_delete'
+        )
+    
+    def get_can_edit(self, obj):
+        request = self.context.get('request')
+        if not request or not request.user:
+            return False
+        return obj.user == request.user or request.user.is_staff
+    
+    def get_can_delete(self, obj):
+        request = self.context.get('request')
+        if not request or not request.user:
+            return False
+        return obj.user == request.user or request.user.is_staff
+
+
+class DailyReportCreateUpdateSerializer(serializers.ModelSerializer):
+    """日报创建和更新序列化器"""
+    
+    class Meta:
+        model = DailyReport
+        fields = (
+            'work_summary', 'next_day_plan', 'difficulties',
+            'suggestions', 'report_date', 'is_draft'
+        )
+    
+    def validate_report_date(self, value):
+        """验证日报日期"""
+        request = self.context.get('request')
+        if not request:
+            return value
+        
+        # 检查是否已存在该日期的日报（更新时排除当前记录）
+        queryset = DailyReport.objects.filter(
+            user=request.user,
+            report_date=value
+        )
+        
+        # 如果是更新操作，排除当前记录
+        if self.instance:
+            queryset = queryset.exclude(id=self.instance.id)
+        
+        if queryset.exists():
+            raise serializers.ValidationError(f'您已在 {value} 提交过日报，每天只能提交一份日报。')
+        
+        return value
+    
+    def create(self, validated_data):
+        validated_data['user'] = self.context['request'].user
+        return super().create(validated_data)
+
+
+class DailyReportStatsSerializer(serializers.Serializer):
+    """日报统计序列化器"""
+    total_reports = serializers.IntegerField()
+    this_month_reports = serializers.IntegerField()
+    this_week_reports = serializers.IntegerField()
+    draft_reports = serializers.IntegerField()
+    completion_rate = serializers.FloatField()
+    
+    
+class UserReportStatsSerializer(serializers.Serializer):
+    """用户日报统计序列化器"""
+    user = UserSimpleSerializer()
+    total_reports = serializers.IntegerField()
+    this_month_reports = serializers.IntegerField()
+    last_report_date = serializers.DateField()
+    completion_rate = serializers.FloatField()