bwstudio
fde86b90d2
- 后端: 新增 dislike_count 字段（模型/Schema/数据库迁移）
- 后端: 新增 POST /api/jokes/{id}/dislike 端点
- 后端: 管理后台统计新增 total_dislikes
- 前端: 新增 useVote 组合函数（localStorage 持久化防重复）
- 前端: JokeCard 列表卡片新增 👍/👎 可点击投票按钮
- 前端: 详情页 ❤️ 改为 👍 赞一下 / 👎 踩一脚 双按钮
236 lines
8.2 KiB
Python
236 lines
8.2 KiB
Python
import json
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import random
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from fastapi import APIRouter, Depends, HTTPException, Query
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from sqlalchemy import func, text
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from sqlalchemy.orm import Session
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from app.database import get_db
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from app.models.joke import Joke
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from app.models.category import JokeCrowd, JokeType
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from app.schemas.joke import JokeResponse, PaginatedJokeResponse
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router = APIRouter(prefix="/jokes", tags=["笑话"])
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def _parse_ids(raw) -> list[int]:
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if not raw:
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return []
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if isinstance(raw, list):
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return raw
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try:
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return json.loads(raw)
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except Exception:
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return []
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def _batch_load_categories(db: Session, jokes: list[Joke]) -> tuple[dict, dict]:
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"""批量加载类型和人群名称，避免 N+1 查询"""
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# 收集所有需要的 id
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all_type_ids = set()
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all_crowd_ids = set()
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for joke in jokes:
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all_type_ids.update(_parse_ids(joke.type_ids))
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all_crowd_ids.update(_parse_ids(joke.crowd_ids))
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# 批量查询
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type_map = {}
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if all_type_ids:
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types = db.query(JokeType).filter(JokeType.id.in_(all_type_ids)).all()
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type_map = {t.id: t.name for t in types}
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crowd_map = {}
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if all_crowd_ids:
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crowds = db.query(JokeCrowd).filter(JokeCrowd.id.in_(all_crowd_ids)).all()
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crowd_map = {c.id: c.name for c in crowds}
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return type_map, crowd_map
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def joke_to_response(joke: Joke, type_map: dict = None, crowd_map: dict = None) -> JokeResponse:
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"""Convert Joke model to JokeResponse schema.
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Args:
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type_map: 预加载的类型 id→name 映射
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crowd_map: 预加载的人群 id→name 映射
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"""
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ids = _parse_ids(joke.type_ids)
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crowd_ids = _parse_ids(joke.crowd_ids)
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if type_map is not None:
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type_names = [type_map[i] for i in ids if i in type_map]
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else:
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type_names = []
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if crowd_map is not None:
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crowd_names = [crowd_map[i] for i in crowd_ids if i in crowd_map]
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else:
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crowd_names = []
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return JokeResponse(
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id=joke.id,
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title=joke.title,
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content=joke.content,
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type_ids=ids,
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crowd_ids=crowd_ids,
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status=joke.status,
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view_count=joke.view_count,
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like_count=joke.like_count,
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dislike_count=joke.dislike_count,
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created_at=joke.created_at,
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updated_at=joke.updated_at,
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type_names=type_names,
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crowd_names=crowd_names,
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polished_content=joke.polished_content,
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ai_score=joke.ai_score,
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ai_level=joke.ai_level,
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)
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def _build_json_filter(column, target_ids: set[int]) -> list:
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"""构建精确的 JSON 数组匹配过滤器（SQLite）"""
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filters = []
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for tid in target_ids:
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# 匹配 [n,...] 或 [...,n,...] 或 [...,n]
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# 使用 JSON_EACH 函数检查
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json_str = json.dumps(tid)
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filters.append(
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func.json_extract(column, '$').cast(type(target_ids)).contains(tid)
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)
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return filters
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@router.get("/", response_model=PaginatedJokeResponse)
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def list_jokes(
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page: int = 1,
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page_size: int = 20,
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type_ids: str | None = Query(None, description="逗号分隔的类型 ID，如 1,3,5"),
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crowd_ids: str | None = Query(None, description="逗号分隔的人群 ID，如 2,4"),
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db: Session = Depends(get_db),
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):
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"""获取笑话列表（仅返回已审核通过的笑话）"""
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query = db.query(Joke).filter(Joke.status == "approved")
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# 支持多选过滤：逗号分隔的 ID
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# 使用自定义 JSON 匹配函数避免 LIKE %N% 的错误匹配
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if type_ids:
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filter_set = {int(x.strip()) for x in type_ids.split(",") if x.strip().isdigit()}
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if filter_set:
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# 使用文本匹配，确保精确匹配 JSON 数组中的 id
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# 匹配模式：[1,2,3] 或 [1] 或带尾部逗号的
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type_filters = []
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for tid in filter_set:
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# 构建精确匹配的正则：在逗号、引号、方括号包围中的数字
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import re
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pattern = rf'["\s\[,]{tid}[",\s\]]'
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type_filters.append(Joke.type_ids.regexp_match(pattern))
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# 只要匹配任一类型即可
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type_filter = type_filters[0]
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for f in type_filters[1:]:
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type_filter = type_filter | f
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# 还需要兼容旧的单值 type_id 字段
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old_filter = Joke.type_id.in_(filter_set)
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query = query.filter(old_filter | type_filter)
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if crowd_ids:
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filter_set = {int(x.strip()) for x in crowd_ids.split(",") if x.strip().isdigit()}
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if filter_set:
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import re
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crowd_filters = []
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for cid in filter_set:
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pattern = rf'["\s\[,]{cid}[",\s\]]'
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crowd_filters.append(Joke.crowd_ids.regexp_match(pattern))
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crowd_filter = crowd_filters[0]
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for f in crowd_filters[1:]:
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crowd_filter = crowd_filter | f
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old_filter = Joke.crowd_id.in_(filter_set)
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query = query.filter(old_filter | crowd_filter)
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total = query.count()
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offset = (page - 1) * page_size
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jokes = query.order_by(Joke.created_at.desc()).offset(offset).limit(page_size).all()
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# 批量预加载类型和人群名称
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type_map, crowd_map = _batch_load_categories(db, jokes)
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return PaginatedJokeResponse(
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items=[joke_to_response(j, type_map, crowd_map) for j in jokes],
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total=total,
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page=page,
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page_size=page_size,
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)
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@router.get("/{joke_id}", response_model=JokeResponse)
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def get_joke(joke_id: int, db: Session = Depends(get_db)):
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"""获取单条笑话详情"""
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# 只返回已审核通过的笑话
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joke = db.query(Joke).filter(
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Joke.id == joke_id,
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Joke.status == "approved"
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).first()
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if not joke:
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raise HTTPException(status_code=404, detail="笑话不存在")
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# 使用原子更新避免并发竞态
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db.query(Joke).filter(Joke.id == joke_id).update({Joke.view_count: Joke.view_count + 1})
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db.commit()
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# 重新查询获取更新后的数据
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db.refresh(joke)
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# 批量加载类型和人群名称
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type_map, crowd_map = _batch_load_categories(db, [joke])
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return joke_to_response(joke, type_map, crowd_map)
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@router.get("/random", response_model=JokeResponse)
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def get_random_joke(db: Session = Depends(get_db)):
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"""随机获取一条已审核通过的笑话"""
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# 使用效率更高的方式：随机 ID 取模
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max_id = db.query(func.max(Joke.id)).filter(Joke.status == "approved").scalar()
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if not max_id:
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raise HTTPException(status_code=404, detail="暂无笑话")
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# 尝试最多 10 次找到有效笑话
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for _ in range(10):
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random_id = random.randint(1, max_id)
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joke = db.query(Joke).filter(
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Joke.id >= random_id,
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Joke.status == "approved"
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).first()
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if joke:
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type_map, crowd_map = _batch_load_categories(db, [joke])
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return joke_to_response(joke, type_map, crowd_map)
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# 兜底：全表随机
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joke = db.query(Joke).filter(Joke.status == "approved").order_by(func.random()).first()
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if not joke:
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raise HTTPException(status_code=404, detail="暂无笑话")
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type_map, crowd_map = _batch_load_categories(db, [joke])
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return joke_to_response(joke, type_map, crowd_map)
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def _vote_joke(joke_id: int, field: str, db: Session):
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"""通用投票逻辑：点赞或点踩（仅允许已审核通过的笑话）"""
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joke = db.query(Joke).filter(
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Joke.id == joke_id,
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Joke.status == "approved"
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).first()
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if not joke:
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raise HTTPException(status_code=404, detail="笑话不存在")
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# 使用原子更新避免并发竞态
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update_data = {getattr(Joke, field): getattr(Joke, field) + 1}
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db.query(Joke).filter(Joke.id == joke_id).update(update_data)
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db.commit()
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db.refresh(joke)
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return {"message": "操作成功", field: getattr(joke, field)}
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@router.post("/{joke_id}/like")
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def like_joke(joke_id: int, db: Session = Depends(get_db)):
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"""为笑话点赞（仅允许已审核通过的笑话）"""
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return _vote_joke(joke_id, "like_count", db)
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@router.post("/{joke_id}/dislike")
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def dislike_joke(joke_id: int, db: Session = Depends(get_db)):
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"""为笑话点踩（仅允许已审核通过的笑话）"""
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return _vote_joke(joke_id, "dislike_count", db) |