我试图从我的 tinyDB 中获取最后一条记录,所以我想做一个看起来像这样的查询:
"SELECT * FROM table ORDER BY id DESC LIMIT 1"
它应该给我最后一行。虽然我不知道如何用 TinyDB 做到这一点。
问问题
2858 次
3 回答
2
如果您想按时间降序对 db 进行排序,例如:
od = sorted(db.all(), key=lambda k: k['time'])
print(od[-1])
于 2018-05-24T21:02:00.237 回答
0
于 2018-09-06T02:16:53.050 回答
0
Using a Query
and doing an update :
with TinyDB('db.json') as db:
my_table = db.table('a_table_name')
my_query= Query()
first_of_table_for_this_query = my_table.search(my_query.some_field == some_value)[1]
last_of_table_for_this_query = my_table.search(my_query.some_field == some_value)[-1]
# exemple of use for updating first inserted and last inserted only
my_table.update({'some_field': some_value+42}, doc_ids=[
first_of_table_for_this_query,
last_of_table_for_this_query
])
于 2020-07-03T08:52:25.117 回答