def bg_task(url: HttpUrl, db: Session):
"""这里注意一个坑，不要在后台任务的参数中db: Session = Depends(get_db)这样导入依赖"""
city_data = requests.get(url=f"{url}?source=jhu&country_code=CN&timelines=false")
if 200 == city_data.status_code:
db.query(City).delete() # 同步数据前先清空原有的数据
for location in city_data.json()["locations"]:
city = {
"province": location["province"],
"country": location["country"],
"country_code": "CN",
"country_population": location["country_population"]
}
crud.create_city(db=db, city=schemas.CreateCity(**city))
coronavirus_data = requests.get(url=f"{url}?source=jhu&country_code=CN&timelines=true")
if 200 == coronavirus_data.status_code:
db.query(Data).delete()
for city in coronavirus_data.json()["locations"]:
db_city = crud.get_city_by_name(db=db, name=city["province"])
for date, confirmed in city["timelines"]["confirmed"]["timeline"].items():
data = {
"date": date.split("T")[0], # 把'2020-12-31T00:00:00Z' 变成 ‘2020-12-31’
"confirmed": confirmed,
"deaths": city["timelines"]["deaths"]["timeline"][date],
"recovered": 0 # 每个城市每天有多少人痊愈，这种数据没有
}
# 这个city_id是city表中的主键ID，不是coronavirus_data数据里的ID
crud.create_city_data(db=db, data=schemas.CreateData(**data), city_id=db_city.id)
def create_data_for_city(city: str, data: schemas.CreateData, db: Session = Depends(get_db)):
db_city = crud.get_city_by_name(db, name=city)
data = crud.create_city_data(db=db, data=data, city_id=db_city.id)
return data