本文整理汇总了Python中sqlalchemy.orm.collections.collection.removes_return方法的典型用法代码示例。如果您正苦于以下问题：Python collection.removes_return方法的具体用法？Python collection.removes_return怎么用？Python collection.removes_return使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sqlalchemy.orm.collections.collection的用法示例。
在下文中一共展示了collection.removes_return方法的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: remover
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def remover(fn):
"""Tag the method as the collection remover.
The remover method is called with one positional argument: the value
to remove. The method will be automatically decorated with
:meth:`removes_return` if not already decorated::
@collection.remover
def zap(self, entity): ...
# or, equivalently
@collection.remover
@collection.removes_return()
def zap(self, ): ...
If the value to remove is not present in the collection, you may
raise an exception or return None to ignore the error.
If the remove method is internally instrumented, you must also
receive the keyword argument '_sa_initiator' and ensure its
promulgation to collection events.
"""
fn._sa_instrument_role = 'remover'
return fn 示例2: removes
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def removes(arg):
"""Mark the method as removing an entity in the collection.
Adds "remove from collection" handling to the method. The decorator
argument indicates which method argument holds the SQLAlchemy-relevant
value to be removed. Arguments can be specified positionally (i.e.
integer) or by name::
@collection.removes(1)
def zap(self, item): ...
For methods where the value to remove is not known at call-time, use
collection.removes_return.
"""
def decorator(fn):
fn._sa_instrument_before = ('fire_remove_event', arg)
return fn
return decorator 示例3: removes_return
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def removes_return():
"""Mark the method as removing an entity in the collection.
Adds "remove from collection" handling to the method. The return
value of the method, if any, is considered the value to remove. The
method arguments are not inspected::
@collection.removes_return()
def pop(self): ...
For methods where the value to remove is known at call-time, use
collection.remove.
"""
def decorator(fn):
fn._sa_instrument_after = 'fire_remove_event'
return fn
return decorator 示例4: remover
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def remover(fn):
"""Tag the method as the collection remover.
The remover method is called with one positional argument: the value
to remove. The method will be automatically decorated with
:meth:`removes_return` if not already decorated::
@collection.remover
def zap(self, entity): ...
# or, equivalently
@collection.remover
@collection.removes_return()
def zap(self, ): ...
If the value to remove is not present in the collection, you may
raise an exception or return None to ignore the error.
If the remove method is internally instrumented, you must also
receive the keyword argument '_sa_initiator' and ensure its
promulgation to collection events.
"""
fn._sa_instrument_role = "remover"
return fn 示例5: removes
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def removes(arg):
"""Mark the method as removing an entity in the collection.
Adds "remove from collection" handling to the method. The decorator
argument indicates which method argument holds the SQLAlchemy-relevant
value to be removed. Arguments can be specified positionally (i.e.
integer) or by name::
@collection.removes(1)
def zap(self, item): ...
For methods where the value to remove is not known at call-time, use
collection.removes_return.
"""
def decorator(fn):
fn._sa_instrument_before = ("fire_remove_event", arg)
return fn
return decorator 示例6: removes_return
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def removes_return():
"""Mark the method as removing an entity in the collection.
Adds "remove from collection" handling to the method. The return
value of the method, if any, is considered the value to remove. The
method arguments are not inspected::
@collection.removes_return()
def pop(self): ...
For methods where the value to remove is known at call-time, use
collection.remove.
"""
def decorator(fn):
fn._sa_instrument_after = "fire_remove_event"
return fn
return decorator 示例7: removes_return
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def removes_return():
"""Mark the method as removing an entity in the collection.
Adds "remove from collection" handling to the method. The return value
of the method, if any, is considered the value to remove. The method
arguments are not inspected::
@collection.removes_return()
def pop(self): ...
For methods where the value to remove is known at call-time, use
collection.remove.
"""
def decorator(fn):
fn._sa_instrument_after = 'fire_remove_event'
return fn
return decorator 示例8: test_object_duck
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def test_object_duck(self):
class MyCollection(object):
def __init__(self):
self.data = set()
@collection.appender
def push(self, item):
self.data.add(item)
@collection.remover
def zark(self, item):
self.data.remove(item)
@collection.removes_return()
def maybe_zark(self, item):
if item in self.data:
self.data.remove(item)
return item
@collection.iterator
def __iter__(self):
return iter(self.data)
__hash__ = object.__hash__
def __eq__(self, other):
return self.data == other
self._test_adapter(MyCollection)
self._test_object(MyCollection)
self.assert_(
getattr(MyCollection, "_sa_instrumented") == id(MyCollection)
) 示例9: test_object_emulates
# 需要导入模块: from sqlalchemy.orm.collections import collection [as 别名]
# 或者: from sqlalchemy.orm.collections.collection import removes_return [as 别名]
def test_object_emulates(self):
class MyCollection2(object):
__emulates__ = None
def __init__(self):
self.data = set()
# looks like a list
def append(self, item):
assert False
@collection.appender
def push(self, item):
self.data.add(item)
@collection.remover
def zark(self, item):
self.data.remove(item)
@collection.removes_return()
def maybe_zark(self, item):
if item in self.data:
self.data.remove(item)
return item
@collection.iterator
def __iter__(self):
return iter(self.data)
__hash__ = object.__hash__
def __eq__(self, other):
return self.data == other
self._test_adapter(MyCollection2)
self._test_object(MyCollection2)
self.assert_(
getattr(MyCollection2, "_sa_instrumented") == id(MyCollection2)
)