本文整理汇总了Python中sqlalchemy.orm.object_mapper方法的典型用法代码示例。如果您正苦于以下问题:Python orm.object_mapper方法的具体用法?Python orm.object_mapper怎么用?Python orm.object_mapper使用的例子?那么, 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
的用法示例。
在下文中一共展示了orm.object_mapper方法的10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: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
self._i = iter(object_mapper(self).columns)
return self
示例2: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
return ModelIterator(self, iter(dict(object_mapper(self).columns).keys()))
示例3: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
columns = list(dict(object_mapper(self).columns).keys())
return ModelIterator(self, iter(columns))
示例4: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
self._i = iter(orm.object_mapper(self).sa.Columns)
return self
示例5: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
self._i = iter(orm.object_mapper(self).columns)
return self
示例6: __iter__
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def __iter__(self):
columns = list(dict(object_mapper(self).columns).keys())
# NOTE(russellb): Allow models to specify other keys that can be looked
# up, beyond the actual db columns. An example would be the 'name'
# property for an Instance.
columns.extend(self._extra_keys)
return ModelIterator(self, iter(columns))
示例7: _assert_not_orphan
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def _assert_not_orphan(self, c1):
mapper = object_mapper(c1)
state = instance_state(c1)
assert not mapper._is_orphan(state)
示例8: _assert_is_orphan
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def _assert_is_orphan(self, c1):
mapper = object_mapper(c1)
state = instance_state(c1)
assert mapper._is_orphan(state)
示例9: create_history
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def create_history(obj, history_cls=None):
if not history_cls:
history_mapper = obj.__history_mapper__
history_cls = history_mapper.class_
obj_mapper = object_mapper(obj)
obj_state = attributes.instance_state(obj)
data = {}
for prop in obj_mapper.iterate_properties:
# expired object attributes and also deferred cols might not
# be in the dict. force it them load no matter what by using getattr().
if prop.key not in obj_state.dict:
getattr(obj, prop.key)
# if prop is a normal col just set it on history model
if isinstance(prop, ColumnProperty):
if not data.get(prop.key):
data[prop.key] = getattr(obj, prop.key)
# if the prop is a relationship property and there is a
# corresponding prop on hist object then set the
# relevant "_id" prop to the id of the current object.prop.id.
# This is so foreign keys get set on history when
# the source object is new and therefore property foo_id does
# not yet have a value before insert
elif isinstance(prop, RelationshipProperty):
if hasattr(history_cls, prop.key + '_id'):
foreign_obj = getattr(obj, prop.key)
# if it's a nullable relationship, foreign_obj will be None, and we actually want to record that
data[prop.key + '_id'] = getattr(foreign_obj, 'id', None)
if not obj.version:
obj.version = 1
obj.created_at = datetime.datetime.utcnow()
else:
obj.version += 1
now = datetime.datetime.utcnow()
obj.updated_at = now
data['updated_at'] = now
data['version'] = obj.version
data['created_at'] = obj.created_at
return history_cls(**data)
示例10: _roundtrip
# 需要导入模块: from sqlalchemy import orm [as 别名]
# 或者: from sqlalchemy.orm import object_mapper [as 别名]
def _roundtrip(
self, set_event=True, parent_ident="parent", child_ident="child"
):
Parent, Child = self.classes.Parent, self.classes.Child
# locate the "polymorphic_on" ColumnProperty. This isn't
# "officially" stored at the moment so do some heuristics to find it.
parent_mapper = inspect(Parent)
for prop in parent_mapper.column_attrs:
if not prop.instrument:
break
else:
prop = parent_mapper._columntoproperty[
parent_mapper.polymorphic_on
]
# then make sure the column we will query on matches.
is_(parent_mapper.polymorphic_on, prop.columns[0])
if set_event:
@event.listens_for(Parent, "init", propagate=True)
def set_identity(instance, *arg, **kw):
ident = object_mapper(instance).polymorphic_identity
if ident == "parent":
instance.x = parent_ident
elif ident == "child":
instance.x = child_ident
else:
assert False, "Got unexpected identity %r" % ident
s = Session(testing.db)
s.add_all([Parent(q="p1"), Child(q="c1", y="c1"), Parent(q="p2")])
s.commit()
s.close()
eq_(
[type(t) for t in s.query(Parent).order_by(Parent.id)],
[Parent, Child, Parent],
)
eq_([type(t) for t in s.query(Child).all()], [Child])