feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/app/services/course_exam_service.py

@@ -0,0 +1,137 @@
+"""
+课程考试设置服务
+"""
+from typing import Optional
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.logger import get_logger
+from app.models.course_exam_settings import CourseExamSettings
+from app.schemas.course import CourseExamSettingsCreate, CourseExamSettingsUpdate
+from app.services.base_service import BaseService
+
+logger = get_logger(__name__)
+
+
+class CourseExamService(BaseService[CourseExamSettings]):
+    """课程考试设置服务"""
+    
+    def __init__(self):
+        super().__init__(CourseExamSettings)
+    
+    async def get_by_course_id(self, db: AsyncSession, course_id: int) -> Optional[CourseExamSettings]:
+        """
+        根据课程ID获取考试设置
+        
+        Args:
+            db: 数据库会话
+            course_id: 课程ID
+            
+        Returns:
+            考试设置实例或None
+        """
+        stmt = select(CourseExamSettings).where(
+            CourseExamSettings.course_id == course_id,
+            CourseExamSettings.is_deleted == False
+        )
+        result = await db.execute(stmt)
+        return result.scalar_one_or_none()
+    
+    async def create_or_update(
+        self, 
+        db: AsyncSession, 
+        course_id: int, 
+        settings_in: CourseExamSettingsCreate,
+        user_id: int
+    ) -> CourseExamSettings:
+        """
+        创建或更新课程考试设置
+        
+        Args:
+            db: 数据库会话
+            course_id: 课程ID
+            settings_in: 考试设置数据
+            user_id: 操作用户ID
+            
+        Returns:
+            考试设置实例
+        """
+        # 检查是否已存在设置
+        existing_settings = await self.get_by_course_id(db, course_id)
+        
+        if existing_settings:
+            # 更新现有设置
+            update_data = settings_in.model_dump(exclude_unset=True)
+            for field, value in update_data.items():
+                setattr(existing_settings, field, value)
+            existing_settings.updated_by = user_id
+            
+            await db.commit()
+            await db.refresh(existing_settings)
+            
+            logger.info(f"更新课程考试设置成功", course_id=course_id, user_id=user_id)
+            return existing_settings
+        else:
+            # 创建新设置
+            create_data = settings_in.model_dump()
+            create_data.update({
+                "course_id": course_id,
+                "created_by": user_id,
+                "updated_by": user_id
+            })
+            
+            new_settings = CourseExamSettings(**create_data)
+            db.add(new_settings)
+            
+            await db.commit()
+            await db.refresh(new_settings)
+            
+            logger.info(f"创建课程考试设置成功", course_id=course_id, user_id=user_id)
+            return new_settings
+    
+    async def update(
+        self,
+        db: AsyncSession,
+        course_id: int,
+        settings_in: CourseExamSettingsUpdate,
+        user_id: int
+    ) -> CourseExamSettings:
+        """
+        更新课程考试设置
+        
+        Args:
+            db: 数据库会话
+            course_id: 课程ID
+            settings_in: 更新的考试设置数据
+            user_id: 操作用户ID
+            
+        Returns:
+            更新后的考试设置实例
+        """
+        # 获取现有设置
+        settings = await self.get_by_course_id(db, course_id)
+        if not settings:
+            # 如果不存在，创建新的
+            create_data = settings_in.model_dump(exclude_unset=True)
+            return await self.create_or_update(
+                db, 
+                course_id=course_id,
+                settings_in=CourseExamSettingsCreate(**create_data),
+                user_id=user_id
+            )
+        
+        # 更新设置
+        update_data = settings_in.model_dump(exclude_unset=True)
+        for field, value in update_data.items():
+            setattr(settings, field, value)
+        settings.updated_by = user_id
+        
+        await db.commit()
+        await db.refresh(settings)
+        
+        logger.info(f"更新课程考试设置成功", course_id=course_id, user_id=user_id)
+        return settings
+
+
+# 创建服务实例
+course_exam_service = CourseExamService()