sqlite3Pony orm (バージョン 0.7.1、python 3.6.0) を使用してアクセスしているデータベースがあります。
列/フィールドの 1 つは期間 ( timedelta) です。期間が指定された時間未満のすべての行を選択しようとしています。
私がやっていることの最小限の例:
import pony.orm
from datetime import timedelta
db = pony.orm.Database()
class TestTime(db.Entity):
id = pony.orm.PrimaryKey(int, auto=True)
td = pony.orm.Required(timedelta)
db.bind('sqlite', ':memory:', create_db=True)
db.generate_mapping(create_tables=True)
if __name__ == "__main__":
with pony.orm.db_session:
tt1 = TestTime(td=timedelta(seconds=12))
tt2 = TestTime(td=timedelta(seconds=18))
db.commit()
delta = timedelta(seconds=15)
with pony.orm.db_session:
TestTime.select(lambda x: x.td < delta)
これを実行すると、AssertionError: delta
pony.orm.select(x for x in TestTime if x.td < delta)構文を使用してクエリを実行すると、同じエラーが発生します。
それが役立つ場合の完全なトレースは次のとおりです。
Traceback (most recent call last):
File "ponytd.py", line 23, in <module>
TestTime.select(lambda x: x.td < delta)
File "<string>", line 2, in select
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/utils/utils.py", line 58, in cut_traceback
return func(*args, **kwargs)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/core.py", line 3596, in select
return entity._query_from_args_(args, kwargs=None, frame_depth=3)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/core.py", line 3943, in _query_from_args_
return Query(code_key, inner_expr, globals, locals, cells)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/core.py", line 5087, in __init__
translator = translator_cls(tree, extractors, vartypes, left_join=left_join)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 269, in __init__
translator.dispatch(if_)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 82, in dispatch
return ASTTranslator.dispatch(translator, node) # default route
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/asttranslation.py", line 29, in dispatch
translator.dispatch(child)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 82, in dispatch
return ASTTranslator.dispatch(translator, node) # default route
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/asttranslation.py", line 24, in dispatch
stop = translator.call(pre_method, node)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 135, in call
reraise(exc_class, exc, tb)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/utils/utils.py", line 85, in reraise
try: raise exc.with_traceback(tb)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 125, in call
try: monad = method(node)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 649, in preCompare
translator.dispatch(right)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 83, in dispatch
translator.call(translator.dispatch_external, node)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 135, in call
reraise(exc_class, exc, tb)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/utils/utils.py", line 85, in reraise
try: raise exc.with_traceback(tb)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 125, in call
try: monad = method(node)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 119, in dispatch_external
monad = translator.ParamMonad.new(translator, t, (varkey, None, None))
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 1646, in new
result = cls(translator, type, paramkey)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 1654, in __init__
Monad.__init__(monad, translator, type)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 1006, in __init__
monad.mixin_init()
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 986, in wrapper
return method(monad, *args, **kwargs)
File "/home/user/.local/share/virtualenvs/test-Tqz3IJV7/lib/python3.6/site-packages/pony/orm/sqltranslation.py", line 1310, in mixin_init
assert monad.type is time
AssertionError: delta
私は何か間違ったことをしていますか、それとももっと良い方法がありますか?