docker

backend/.dockerignore

@@ -0,0 +1,10 @@
+.venv/
+__pycache__/
+*.pyc
+*.pyo
+.env
+*.db
+.git
+.gitignore
+*.md
+alembic/versions/

backend/.env.example

@@ -1,33 +1,33 @@
 # Service
 CH_HOST=0.0.0.0
 CH_PORT=8000
-CH_DEBUG=true
+CH_DEBUG=false
 
-# Database
-CH_DATABASE_URL=sqlite+aiosqlite:///./classhub.db
+# Database (Docker 部署时使用 volume 路径)
+CH_DATABASE_URL=sqlite+aiosqlite:///./data/classhub.db
 
-# JWT
+# JWT (务必修改 secret)
 CH_JWT_SECRET=change-me-in-production
 CH_JWT_EXPIRY_HOURS=72
 
-# Tencent COS
-CH_COS_SECRET_ID=AKIDUxR3TfeWDbqFQQDn9INJ1U8annY7TbWN
-CH_COS_SECRET_KEY=jJitIUTFyf5WvDPXiigS2PaaMtCJSQCn
+# Tencent COS (对象存储)
+CH_COS_SECRET_ID=your-cos-secret-id
+CH_COS_SECRET_KEY=your-cos-secret-key
 CH_COS_REGION=ap-guangzhou
-CH_COS_BUCKET=hku-icb-1311994147
-CH_COS_BASE_URL=https://hku-icb-1311994147.cos.ap-guangzhou.myqcloud.com
+CH_COS_BUCKET=your-bucket-name
+CH_COS_BASE_URL=https://your-bucket.cos.ap-guangzhou.myqcloud.com
 
-# SMTP Email
-CH_SMTP_HOST=gz-smtp.qcloudmail.com
+# SMTP Email (邮件通知)
+CH_SMTP_HOST=smtp.example.com
 CH_SMTP_PORT=465
-CH_SMTP_USER=noreply@hkuicb.info
-CH_SMTP_PASSWORD=hX2gqEPjaRhULXF69
-CH_SMTP_FROM_EMAIL=noreply@hkuicb.info
+CH_SMTP_USER=noreply@example.com
+CH_SMTP_PASSWORD=your-smtp-password
+CH_SMTP_FROM_EMAIL=noreply@example.com
 CH_SMTP_FROM_NAME=HKU ICB Class Hub
 
-# Frontend URL
-CH_FRONTEND_URL=http://localhost:3000
+# Frontend URL (CORS 用)
+CH_FRONTEND_URL=http://your-server-ip
 
-# Super Admin Seed
-CH_SUPER_ADMIN_EMAIL=admin@hkuicb.info
-CH_SUPER_ADMIN_PASSWORD=admin123
+# Super Admin Seed (首次启动自动创建)
+CH_SUPER_ADMIN_EMAIL=admin@example.com
+CH_SUPER_ADMIN_PASSWORD=change-me-please

backend/Dockerfile

@@ -0,0 +1,17 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+# Install dependencies first (layer caching)
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create data directory for SQLite
+RUN mkdir -p /app/data
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

backend/app/api/assignments.py

@@ -1,9 +1,11 @@
 from fastapi import APIRouter, Depends, HTTPException, UploadFile, File
+from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import selectinload
 
 from app.core.deps import require_role
 from app.db.database import get_db
-from app.db.models import User
+from app.db.models import User, Class_
 from app.schemas.assignment import (
     AssignmentCreate, AssignmentUpdate, AssignmentOut,
     AssignmentDetailOut, SubmissionGrade, SubmissionOut,
@@ -26,7 +28,15 @@ from app.services.cos_service import upload_file
 router = APIRouter(prefix="/api/assignments", tags=["assignments"])
 
 
-def _build_assignment_out(a: any, user_id: int) -> AssignmentOut:
+async def _get_roster_count(db: AsyncSession, class_id: int) -> int:
+    from app.db.models import StudentRoster
+    result = await db.execute(
+        select(func.count(StudentRoster.id)).where(StudentRoster.class_id == class_id)
+    )
+    return result.scalar() or 0
+
+
+def _build_assignment_out(a: any, user_id: int, total_members: int = 0) -> AssignmentOut:
     submission_count = len(a.submissions) if a.submissions else 0
     my_submitted = any(s.student_id == user_id for s in (a.submissions or []))
     return AssignmentOut(
@@ -40,6 +50,7 @@ def _build_assignment_out(a: any, user_id: int) -> AssignmentOut:
         attachment_urls=a.get_attachment_urls_list(),
         status=a.status,
         submission_count=submission_count,
+        total_members=total_members,
         my_submitted=my_submitted,
         created_at=a.created_at,
         updated_at=a.updated_at,
@@ -79,7 +90,8 @@ async def get_assignments(
 
     assignments, total = await list_assignments(db, effective_class_id, page, page_size)
     total_pages = (total + page_size - 1) // page_size
-    items = [_build_assignment_out(a, user.id) for a in assignments]
+    roster_count = await _get_roster_count(db, effective_class_id)
+    items = [_build_assignment_out(a, user.id, roster_count) for a in assignments]
     return PageResponse(items=items, total=total, page=page, page_size=page_size, total_pages=total_pages)
 
 
@@ -95,7 +107,8 @@ async def create_new_assignment(
         raise HTTPException(status_code=400, detail="You are not assigned to a class")
 
     assignment = await create_assignment(db, effective_class_id, user.id, data)
-    return _build_assignment_out(assignment, user.id)
+    roster_count = await _get_roster_count(db, effective_class_id)
+    return _build_assignment_out(assignment, user.id, roster_count)
 
 
 @router.post("/{assignment_id}/attachments")
@@ -138,7 +151,7 @@ async def get_assignment_detail(
     if user.role != "super_admin" and assignment.class_id != user.class_id:
         raise HTTPException(status_code=403, detail="Access denied")
 
-    base = _build_assignment_out(assignment, user.id)
+    base = _build_assignment_out(assignment, user.id, await _get_roster_count(db, assignment.class_id))
 
     # Student only sees their own submission
     if user.role == "student":
@@ -168,7 +181,7 @@ async def update_existing_assignment(
         raise HTTPException(status_code=403, detail="Access denied")
 
     updated = await update_assignment(db, assignment, data)
-    return _build_assignment_out(updated, user.id)
+    return _build_assignment_out(updated, user.id, await _get_roster_count(db, updated.class_id))
 
 
 @router.delete("/{assignment_id}")

backend/app/schemas/assignment.py

@@ -53,6 +53,7 @@ class AssignmentOut(BaseModel):
     attachment_urls: list[str] | None
     status: str
     submission_count: int
+    total_members: int
     my_submitted: bool
     created_at: datetime
     updated_at: datetime

docker-compose.yml

@@ -0,0 +1,42 @@
+services:
+  backend:
+    build: ./backend
+    restart: unless-stopped
+    env_file: ./backend/.env
+    environment:
+      - CH_DATABASE_URL=sqlite+aiosqlite:///./data/classhub.db
+      - CH_FRONTEND_URL=http://localhost
+    volumes:
+      - classhub-data:/app/data
+    expose:
+      - "8000"
+    healthcheck:
+      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/api/health')"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  frontend:
+    build:
+      context: ./frontend
+      args:
+        - NEXT_PUBLIC_API_URL=
+    restart: unless-stopped
+    expose:
+      - "3000"
+    depends_on:
+      - backend
+
+  nginx:
+    image: nginx:alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+    volumes:
+      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf:ro
+    depends_on:
+      - backend
+      - frontend
+
+volumes:
+  classhub-data:

nginx/nginx.conf

@@ -0,0 +1,29 @@
+server {
+    listen 80;
+    server_name _;
+
+    client_max_body_size 20m;
+
+    # API requests → backend
+    location /api/ {
+        proxy_pass http://backend:8000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # Frontend
+    location / {
+        proxy_pass http://frontend:3000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # Next.js HMR (hot module replacement) WebSocket
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+    }
+}