fix(monitor): 作品栏只显示每个博主最新的 N 条（库里一条不删）
原来 max_notes_count **只**被当作每轮拉取的条数，落库时从不删任何东西，列表也不按 博主截断。于是超出的作品会一直堆着（21、22、23…），而掉出采集窗口的那些**再也采不到** —— 指标冻在最后一次，看上去却和正在跟踪的作品一模一样。界面上那句「仅显示每个博主 最新的 N 条作品」是假的，后端根本没做这个截断。 现在界面按窗口显示：库是账本，界面是窗口。趋势图、报表、**导出**读的仍然是全量 —— 导出是数据，少几行就是在丢东西，所以 `windowed` 默认关，只有 /monitor/notes 打开。 窗口按**发布时间**排序，不是「最后一次见到」：降级路径（作品列表被风控挡住）会把所有 已知作品都刷一遍，那样每个人的 last_seen_at 都一样，按它开窗等于没开。解析不出日期的 作品**永不隐藏** —— 因为读不出日期就让一条作品消失，比多显示一条糟得多。 只对博主模式开窗；笔记模式的目标本身就是一件作品。
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# -*- coding: utf-8 -*-
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"""作品栏的**窗口** —— 每个博主只显示最新 N 条。
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采集端 ``aweme/post`` 拿的就是最新 N 条，掉出这个窗口的作品**再也采不到**，指标会冻在
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最后一次。而它看上去和正在跟踪的作品一模一样 —— 那才是会骗人的地方。所以界面按同一个
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窗口显示，库里则一条不删（趋势图、报表、导出读的是全量）。
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"""
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import csv
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import io
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from datetime import datetime
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import httpx
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import pytest
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import pytest_asyncio
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from api.main import app
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from api.monitor import db as monitor_db
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from api.monitor.models import MODE_CREATOR, MODE_NOTE, MonitorNote, MonitorTask
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CREATOR = "hash-a"
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# 固定的基准时刻，避免用例依赖「今天是几号」。
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BASE = int(datetime(2026, 1, 1, 12, 0).timestamp() * 1000)
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@pytest_asyncio.fixture
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async def client(tmp_path):
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monitor_db.set_sqlite_path(tmp_path / "monitor.db")
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await monitor_db.init_db()
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transport = httpx.ASGITransport(app=app)
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async with httpx.AsyncClient(transport=transport, base_url="http://test") as http_client:
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yield http_client
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await monitor_db.dispose_engine()
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async def _seed_task(mode: str = MODE_CREATOR, cap: int = 2) -> int:
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async with monitor_db.get_session() as session:
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task = MonitorTask(
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name="窗口测试", platform="xhs", mode=mode, enabled=True,
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interval_minutes=60, max_notes_count=cap, enable_comments=False,
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max_comments_count=50, run_timeout_seconds=3600,
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notify_enabled=False, created_at=0, updated_at=0,
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)
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session.add(task)
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await session.flush()
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return task.id
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async def _add_note(
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task_id: int,
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note_id: str,
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published_at,
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last_seen_at: int,
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creator_hash: str = CREATOR,
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) -> None:
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async with monitor_db.get_session() as session:
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session.add(
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MonitorNote(
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task_id=task_id, note_id=note_id, title=f"作品{note_id}",
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note_url="", cover="", creator_hash=creator_hash,
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creator_name="博主", source_kind="", published_at=published_at,
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first_seen_run_id=1, first_seen_at=BASE,
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last_seen_run_id=1, last_seen_at=last_seen_at,
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)
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)
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async def _notes(client, **params):
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return (await client.get("/api/monitor/notes", params=params)).json()["notes"]
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def _ids(notes):
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return sorted(note["note_id"] for note in notes)
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class TestCreatorWindow:
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@pytest.mark.asyncio
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async def test_only_the_newest_n_survive(self, client):
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"""三条作品、上限两条 —— 最早的 `a` 掉出窗口。"""
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task_id = await _seed_task(cap=2)
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await _add_note(task_id, "a", BASE, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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await _add_note(task_id, "c", BASE + 2000, BASE + 2000)
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assert _ids(await _notes(client)) == ["b", "c"]
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@pytest.mark.asyncio
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async def test_the_window_is_by_publish_time_not_by_last_seen(self, client):
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"""**这条是这个功能的关键。**
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「最后一次见到」和「最新发布」是两回事：降级路径（作品列表被风控挡住）会把**所有**
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已知作品都刷一遍，于是每条作品的 last_seen_at 都变成最新 —— 按它开窗等于没开。
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窗口必须按发布时间，那才是采集端 `aweme/post` 返回的排序。
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"""
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task_id = await _seed_task(cap=2)
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# a 发布最早，但「最后一次见到」最新。
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await _add_note(task_id, "a", BASE, BASE + 9000)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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await _add_note(task_id, "c", BASE + 2000, BASE + 2000)
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assert _ids(await _notes(client)) == ["b", "c"]
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@pytest.mark.asyncio
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async def test_a_work_with_no_publish_time_is_never_hidden(self, client):
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"""**解析不出日期不该让一条作品消失** —— 多显示一条远好过悄悄少一条。"""
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task_id = await _seed_task(cap=2)
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await _add_note(task_id, "undated", None, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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await _add_note(task_id, "c", BASE + 2000, BASE + 2000)
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assert "undated" in _ids(await _notes(client))
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@pytest.mark.asyncio
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async def test_each_creator_gets_its_own_window(self, client):
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"""上限是「每个博主 N 条」，不是「整个任务 N 条」。"""
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task_id = await _seed_task(cap=1)
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await _add_note(task_id, "a1", BASE, BASE, creator_hash="hash-a")
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await _add_note(task_id, "a2", BASE + 1000, BASE + 1000, creator_hash="hash-a")
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await _add_note(task_id, "b1", BASE, BASE, creator_hash="hash-b")
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assert _ids(await _notes(client)) == ["a2", "b1"]
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@pytest.mark.asyncio
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async def test_a_note_mode_task_is_not_windowed(self, client):
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"""笔记模式的 max_notes_count 管的是「每条目标拉多少」，它的目标本身就是一件作品。"""
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task_id = await _seed_task(mode=MODE_NOTE, cap=1)
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await _add_note(task_id, "a", BASE, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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await _add_note(task_id, "c", BASE + 2000, BASE + 2000)
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assert _ids(await _notes(client)) == ["a", "b", "c"]
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class TestTheDatabaseKeepsEverything:
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@pytest.mark.asyncio
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async def test_the_window_hides_it_but_does_not_delete_it(self, client):
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"""界面是窗口，库是账本 —— 掉出窗口那条必须还在，否则趋势图和报表会缺历史。"""
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from api.monitor.db import get_engine
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task_id = await _seed_task(cap=1)
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await _add_note(task_id, "a", BASE, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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assert _ids(await _notes(client)) == ["b"]
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from sqlalchemy.ext.asyncio import async_sessionmaker
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factory = async_sessionmaker(
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get_engine(), class_=AsyncSession, expire_on_commit=False
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)
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async with factory() as session:
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stored = list((await session.scalars(select(MonitorNote.note_id))).all())
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assert sorted(stored) == ["a", "b"]
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@pytest.mark.asyncio
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async def test_the_export_still_gets_everything(self, client):
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"""导出是**全量账本**，不是屏幕上那一屏 —— 界面上少显示几条是故意的，
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但导出的数据少几条就是在丢东西了。"""
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task_id = await _seed_task(cap=1)
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await _add_note(task_id, "a", BASE, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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response = await client.get(
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"/api/monitor/export", params={"kind": "notes", "format": "csv"}
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)
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rows = list(csv.DictReader(io.StringIO(response.content.decode("utf-8-sig"))))
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assert sorted(row["作品ID"] for row in rows) == ["a", "b"]
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class TestTheGroupHeaderCounts:
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@pytest.mark.asyncio
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async def test_the_creator_list_reports_the_full_count(self, client):
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"""组头显示「显示了几篇 / 库里一共几篇」，两个数不一样是**对的**。
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屏幕上是开过窗的（这个博主最新 N 条），而 ``note_count`` 是库里这个博主的全部
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作品数 —— 组头那行提示说的正是这件事。
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"""
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task_id = await _seed_task(cap=1)
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await _add_note(task_id, "a", BASE, BASE)
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await _add_note(task_id, "b", BASE + 1000, BASE + 1000)
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creators = (await client.get("/api/monitor/notes", params={})).json()["creators"]
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assert creators[0]["note_count"] == 2
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