2021.10 #41
@ -13,6 +13,7 @@ from .._query.first_last import first_or_default_query, first_query, last_or_def
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from .._query.for_each import for_each_query
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from .._query.max_min import max_query, min_query
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from .._query.order_by import order_by_query, order_by_descending_query
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from .._query.reverse import reverse_query
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from .._query.single import single_query, single_or_default_query
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from .._query.where import where_query
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from cpl_query.extension.iterable_abc import IterableABC
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@ -80,6 +81,9 @@ class Iterable(IterableABC):
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res.__class__ = OrderedIterable
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return res
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def reverse(self) -> IterableABC:
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return reverse_query(self)
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def single(self) -> any:
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return single_query(self)
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@ -90,6 +94,3 @@ class Iterable(IterableABC):
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res = where_query(self, func)
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res.__class__ = Iterable
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return res
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def to_list(self) -> list:
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return list(self)
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15
src/cpl_query/_query/reverse.py
Normal file
15
src/cpl_query/_query/reverse.py
Normal file
@ -0,0 +1,15 @@
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from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument
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from cpl_query.extension.iterable_abc import IterableABC
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def reverse_query(_list: IterableABC) -> IterableABC:
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if _list is None:
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raise ArgumentNoneException(ExceptionArgument.list)
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result = IterableABC()
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_copied_list = _list.to_list()
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_copied_list.reverse()
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for element in _copied_list:
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result.append(element)
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return result
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@ -80,9 +80,15 @@ class IterableABC(ABC, list):
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@abstractmethod
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def order_by_descending(self, func: Callable) -> 'IterableABC': pass
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@abstractmethod
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def reverse(self) -> 'IterableABC': pass
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@abstractmethod
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def single(self) -> any: pass
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def to_list(self) -> list:
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return list(self)
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@abstractmethod
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def single_or_default(self) -> Optional[any]: pass
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@ -228,6 +228,13 @@ class QueryTest(unittest.TestCase):
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self.assertEqual(res, s_res)
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def test_reverse(self):
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res = self._tests.reverse()
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l_res = self._tests.to_list()
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l_res.reverse()
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self.assertEqual(l_res, res)
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def test_single(self):
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res = self._tests.where(lambda u: u.address.nr == self._t_user.address.nr)
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s_res = self._tests.where(lambda u: u.address.nr == self._t_user.address.nr).single()
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