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Santiago L 2022-04-06 13:05:51 +02:00
parent 186f6398c0
commit c94b5a648b
1 changed files with 151 additions and 88 deletions
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239
ereuse_devicehub/resources/lot/models.py
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@ -10,7 +10,7 @@ from sqlalchemy import TEXT
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy_utils import LtreeType
from sqlalchemy_utils.types.ltree import LQUERY
from teal.db import CASCADE_OWN, UUIDLtree, check_range, IntEnum
from teal.db import CASCADE_OWN, IntEnum, UUIDLtree, check_range
from teal.resource import url_for_resource
from ereuse_devicehub.db import create_view, db, exp, f
@ -21,70 +21,88 @@ from ereuse_devicehub.resources.user.models import User
class Lot(Thing):
id = db.Column(UUID(as_uuid=True), primary_key=True) # uuid is generated on init by default
id = db.Column(
UUID(as_uuid=True), primary_key=True
) # uuid is generated on init by default
name = db.Column(CIText(), nullable=False)
description = db.Column(CIText())
description.comment = """A comment about the lot."""
closed = db.Column(db.Boolean, default=False, nullable=False)
closed.comment = """A closed lot cannot be modified anymore."""
devices = db.relationship(Device,
backref=db.backref('lots', lazy=True, collection_class=set),
secondary=lambda: LotDevice.__table__,
lazy=True,
collection_class=set)
devices = db.relationship(
Device,
backref=db.backref('lots', lazy=True, collection_class=set),
secondary=lambda: LotDevice.__table__,
lazy=True,
collection_class=set,
)
"""The **children** devices that the lot has.
Note that the lot can have more devices, if they are inside
descendant lots.
"""
parents = db.relationship(lambda: Lot,
viewonly=True,
lazy=True,
collection_class=set,
secondary=lambda: LotParent.__table__,
primaryjoin=lambda: Lot.id == LotParent.child_id,
secondaryjoin=lambda: LotParent.parent_id == Lot.id,
cascade='refresh-expire', # propagate changes outside ORM
backref=db.backref('children',
viewonly=True,
lazy=True,
cascade='refresh-expire',
collection_class=set)
)
parents = db.relationship(
lambda: Lot,
viewonly=True,
lazy=True,
collection_class=set,
secondary=lambda: LotParent.__table__,
primaryjoin=lambda: Lot.id == LotParent.child_id,
secondaryjoin=lambda: LotParent.parent_id == Lot.id,
cascade='refresh-expire', # propagate changes outside ORM
backref=db.backref(
'children',
viewonly=True,
lazy=True,
cascade='refresh-expire',
collection_class=set,
),
)
"""The parent lots."""
all_devices = db.relationship(Device,
viewonly=True,
lazy=True,
collection_class=set,
secondary=lambda: LotDeviceDescendants.__table__,
primaryjoin=lambda: Lot.id == LotDeviceDescendants.ancestor_lot_id,
secondaryjoin=lambda: LotDeviceDescendants.device_id == Device.id)
all_devices = db.relationship(
Device,
viewonly=True,
lazy=True,
collection_class=set,
secondary=lambda: LotDeviceDescendants.__table__,
primaryjoin=lambda: Lot.id == LotDeviceDescendants.ancestor_lot_id,
secondaryjoin=lambda: LotDeviceDescendants.device_id == Device.id,
)
"""All devices, including components, inside this lot and its
descendants.
"""
amount = db.Column(db.Integer, check_range('amount', min=0, max=100), default=0)
owner_id = db.Column(UUID(as_uuid=True),
db.ForeignKey(User.id),
nullable=False,
default=lambda: g.user.id)
owner_id = db.Column(
UUID(as_uuid=True),
db.ForeignKey(User.id),
nullable=False,
default=lambda: g.user.id,
)
owner = db.relationship(User, primaryjoin=owner_id == User.id)
transfer_state = db.Column(IntEnum(TransferState), default=TransferState.Initial, nullable=False)
transfer_state = db.Column(
IntEnum(TransferState), default=TransferState.Initial, nullable=False
)
transfer_state.comment = TransferState.__doc__
receiver_address = db.Column(CIText(),
db.ForeignKey(User.email),
nullable=False,
default=lambda: g.user.email)
receiver_address = db.Column(
CIText(),
db.ForeignKey(User.email),
nullable=False,
default=lambda: g.user.email,
)
receiver = db.relationship(User, primaryjoin=receiver_address == User.email)
def __init__(self, name: str, closed: bool = closed.default.arg,
description: str = None) -> None:
def __init__(
self, name: str, closed: bool = closed.default.arg, description: str = None
) -> None:
"""Initializes a lot
:param name:
:param closed:
"""
super().__init__(id=uuid.uuid4(), name=name, closed=closed, description=description)
super().__init__(
id=uuid.uuid4(), name=name, closed=closed, description=description
)
Path(self) # Lots have always one edge per default.
@property
@ -115,7 +133,9 @@ class Lot(Thing):
@classmethod
def descendantsq(cls, id):
_id = UUIDLtree.convert(id)
return (cls.id == Path.lot_id) & Path.path.lquery(exp.cast('*.{}.*'.format(_id), LQUERY))
return (cls.id == Path.lot_id) & Path.path.lquery(
exp.cast('*.{}.*'.format(_id), LQUERY)
)
@classmethod
def roots(cls):
@ -176,13 +196,17 @@ class Lot(Thing):
if isinstance(child, Lot):
return Path.has_lot(self.id, child.id)
elif isinstance(child, Device):
device = db.session.query(LotDeviceDescendants) \
.filter(LotDeviceDescendants.device_id == child.id) \
.filter(LotDeviceDescendants.ancestor_lot_id == self.id) \
device = (
db.session.query(LotDeviceDescendants)
.filter(LotDeviceDescendants.device_id == child.id)
.filter(LotDeviceDescendants.ancestor_lot_id == self.id)
.one_or_none()
)
return device
else:
raise TypeError('Lot only contains devices and lots, not {}'.format(child.__class__))
raise TypeError(
'Lot only contains devices and lots, not {}'.format(child.__class__)
)
def __repr__(self) -> str:
return '<Lot {0.name} devices={0.devices!r}>'.format(self)
@ -192,35 +216,44 @@ class LotDevice(db.Model):
device_id = db.Column(db.BigInteger, db.ForeignKey(Device.id), primary_key=True)
lot_id = db.Column(UUID(as_uuid=True), db.ForeignKey(Lot.id), primary_key=True)
created = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
author_id = db.Column(UUID(as_uuid=True),
db.ForeignKey(User.id),
nullable=False,
default=lambda: g.user.id)
author_id = db.Column(
UUID(as_uuid=True),
db.ForeignKey(User.id),
nullable=False,
default=lambda: g.user.id,
)
author = db.relationship(User, primaryjoin=author_id == User.id)
author_id.comment = """The user that put the device in the lot."""
class Path(db.Model):
id = db.Column(db.UUID(as_uuid=True),
primary_key=True,
server_default=db.text('gen_random_uuid()'))
id = db.Column(
db.UUID(as_uuid=True),
primary_key=True,
server_default=db.text('gen_random_uuid()'),
)
lot_id = db.Column(db.UUID(as_uuid=True), db.ForeignKey(Lot.id), nullable=False)
lot = db.relationship(Lot,
backref=db.backref('paths',
lazy=True,
collection_class=set,
cascade=CASCADE_OWN),
primaryjoin=Lot.id == lot_id)
lot = db.relationship(
Lot,
backref=db.backref(
'paths', lazy=True, collection_class=set, cascade=CASCADE_OWN
),
primaryjoin=Lot.id == lot_id,
)
path = db.Column(LtreeType, nullable=False)
created = db.Column(db.TIMESTAMP(timezone=True), server_default=db.text('CURRENT_TIMESTAMP'))
created = db.Column(
db.TIMESTAMP(timezone=True), server_default=db.text('CURRENT_TIMESTAMP')
)
created.comment = """When Devicehub created this."""
__table_args__ = (
# dag.delete_edge needs to disable internally/temporarily the unique constraint
db.UniqueConstraint(path, name='path_unique', deferrable=True, initially='immediate'),
db.UniqueConstraint(
path, name='path_unique', deferrable=True, initially='immediate'
),
db.Index('path_gist', path, postgresql_using='gist'),
db.Index('path_btree', path, postgresql_using='btree'),
db.Index('lot_id_index', lot_id, postgresql_using='hash')
db.Index('lot_id_index', lot_id, postgresql_using='hash'),
)
def __init__(self, lot: Lot) -> None:
@ -243,7 +276,9 @@ class Path(db.Model):
child_id = UUIDLtree.convert(child_id)
return bool(
db.session.execute(
"SELECT 1 from path where path ~ '*.{}.*.{}.*'".format(parent_id, child_id)
"SELECT 1 from path where path ~ '*.{}.*.{}.*'".format(
parent_id, child_id
)
).first()
)
@ -263,47 +298,75 @@ class LotDeviceDescendants(db.Model):
"""Ancestor lot table."""
_desc = Lot.__table__.alias()
"""Descendant lot table."""
lot_device = _desc \
.join(LotDevice, _desc.c.id == LotDevice.lot_id) \
.join(Path, _desc.c.id == Path.lot_id)
lot_device = _desc.join(LotDevice, _desc.c.id == LotDevice.lot_id).join(
Path, _desc.c.id == Path.lot_id
)
"""Join: Path -- Lot -- LotDevice"""
descendants = "path.path ~ (CAST('*.'|| replace(CAST({}.id as text), '-', '_') " \
"|| '.*' AS LQUERY))".format(_ancestor.name)
descendants = (
"path.path ~ (CAST('*.'|| replace(CAST({}.id as text), '-', '_') "
"|| '.*' AS LQUERY))".format(_ancestor.name)
)
"""Query that gets the descendants of the ancestor lot."""
devices = db.select([
LotDevice.device_id,
_desc.c.id.label('parent_lot_id'),
_ancestor.c.id.label('ancestor_lot_id'),
db.column('padding') # foo column to have same nunber of columns on joined selects (union)
]).select_from(_ancestor).select_from(lot_device).where(db.text(descendants))
devices = (
db.select(
[
LotDevice.device_id,
_desc.c.id.label('parent_lot_id'),
_ancestor.c.id.label('ancestor_lot_id'),
db.column(
'padding'
), # foo column to have same nunber of columns on joined selects (union)
]
)
.select_from(_ancestor)
.select_from(lot_device)
.where(db.text(descendants))
)
# Components
_parent_device = Device.__table__.alias(name='parent_device')
"""The device that has the access to the lot."""
lot_device_component = lot_device \
.join(_parent_device, _parent_device.c.id == LotDevice.device_id) \
.join(Component, _parent_device.c.id == Component.parent_id)
lot_device_component = lot_device.join(
_parent_device, _parent_device.c.id == LotDevice.device_id
).join(Component, _parent_device.c.id == Component.parent_id)
"""Join: Path -- Lot -- LotDevice -- ParentDevice (Device) -- Component"""
components = db.select([
Component.id.label('device_id'),
_desc.c.id.label('parent_lot_id'),
_ancestor.c.id.label('ancestor_lot_id'),
LotDevice.device_id.label('device_parent_id'),
]).select_from(_ancestor).select_from(lot_device_component).where(db.text(descendants))
components = (
db.select(
[
Component.id.label('device_id'),
_desc.c.id.label('parent_lot_id'),
_ancestor.c.id.label('ancestor_lot_id'),
LotDevice.device_id.label('device_parent_id'),
]
)
.select_from(_ancestor)
.select_from(lot_device_component)
.where(db.text(descendants))
)
__table__ = create_view('lot_device_descendants', devices.union(components))
class LotParent(db.Model):
i = f.index(Path.path, db.func.text2ltree(f.replace(exp.cast(Path.lot_id, TEXT), '-', '_')))
i = f.index(
Path.path, db.func.text2ltree(f.replace(exp.cast(Path.lot_id, TEXT), '-', '_'))
)
__table__ = create_view(
'lot_parent',
db.select([
Path.lot_id.label('child_id'),
exp.cast(f.replace(exp.cast(f.subltree(Path.path, i - 1, i), TEXT), '_', '-'),
UUID).label('parent_id')
]).select_from(Path).where(i > 0),
db.select(
[
Path.lot_id.label('child_id'),
exp.cast(
f.replace(
exp.cast(f.subltree(Path.path, i - 1, i), TEXT), '_', '-'
),
UUID,
).label('parent_id'),
]
)
.select_from(Path)
.where(i > 0),
)