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devicehub-teal/ereuse_devicehub/inventory/models.py

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from uuid import uuid4
from citext import CIText
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from sqlalchemy import Column, Integer
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from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import backref, relationship
from teal.db import CASCADE_OWN
from ereuse_devicehub.db import db
from ereuse_devicehub.resources.models import Thing
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from ereuse_devicehub.resources.user.models import User
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class Transfer(Thing):
"""
The transfer is a transfer of possession of devices between
a user and a code (not system user)
"""
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
code = Column(CIText(), default='', nullable=False)
date = Column(db.TIMESTAMP(timezone=True))
description = Column(CIText(), default='', nullable=True)
lot_id = db.Column(
UUID(as_uuid=True),
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db.ForeignKey('lot.id', use_alter=True, name='lot_transfer'),
nullable=False,
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)
lot = relationship(
'Lot',
backref=backref('transfer', lazy=True, uselist=False, cascade=CASCADE_OWN),
primaryjoin='Transfer.lot_id == Lot.id',
)
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user_from_id = db.Column(UUID(as_uuid=True), db.ForeignKey(User.id), nullable=True)
user_from = db.relationship(User, primaryjoin=user_from_id == User.id)
user_to_id = db.Column(UUID(as_uuid=True), db.ForeignKey(User.id), nullable=True)
user_to = db.relationship(User, primaryjoin=user_to_id == User.id)
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@property
def closed(self):
if self.date:
return True
return False
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class DeliveryNote(Thing):
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
number = Column(CIText(), default='', nullable=False)
date = Column(db.TIMESTAMP(timezone=True))
units = Column(Integer, default=0)
weight = Column(Integer, default=0)
transfer_id = db.Column(
UUID(as_uuid=True),
db.ForeignKey('transfer.id'),
nullable=False,
)
transfer = relationship(
'Transfer',
backref=backref('delivery_note', lazy=True, uselist=False, cascade=CASCADE_OWN),
primaryjoin='DeliveryNote.transfer_id == Transfer.id',
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)
class ReceiverNote(Thing):
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
number = Column(CIText(), default='', nullable=False)
date = Column(db.TIMESTAMP(timezone=True))
units = Column(Integer, default=0)
weight = Column(Integer, default=0)
transfer_id = db.Column(
UUID(as_uuid=True),
db.ForeignKey('transfer.id'),
nullable=False,
)
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transfer = relationship(
'Transfer',
backref=backref('receiver_note', lazy=True, uselist=False, cascade=CASCADE_OWN),
primaryjoin='ReceiverNote.transfer_id == Transfer.id',
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)