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devicehub-teal/ereuse_devicehub/resources/deliverynote/models.py

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import uuid
from datetime import datetime
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from typing import Iterable
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from boltons import urlutils
from citext import CIText
from flask import g
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from sqlalchemy.dialects.postgresql import JSONB, UUID
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from ereuse_devicehub.db import db
from ereuse_devicehub.resources.enums import TransferState
from ereuse_devicehub.resources.lot.models import Lot
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from ereuse_devicehub.resources.models import Thing
from ereuse_devicehub.resources.user.models import User
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from ereuse_devicehub.teal.db import IntEnum, check_range
from ereuse_devicehub.teal.resource import url_for_resource
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class Deliverynote(Thing):
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id = db.Column(
UUID(as_uuid=True), primary_key=True
) # uuid is generated on init by default
document_id = db.Column(CIText(), nullable=False)
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creator_id = db.Column(
UUID(as_uuid=True),
db.ForeignKey(User.id),
nullable=False,
default=lambda: g.user.id,
)
creator = db.relationship(User, primaryjoin=creator_id == User.id)
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supplier_email = db.Column(
CIText(),
db.ForeignKey(User.email),
nullable=False,
default=lambda: g.user.email,
)
supplier = db.relationship(
User, primaryjoin=lambda: Deliverynote.supplier_email == User.email
)
receiver_address = db.Column(
CIText(),
db.ForeignKey(User.email),
nullable=False,
default=lambda: g.user.email,
)
receiver = db.relationship(
User, primaryjoin=lambda: Deliverynote.receiver_address == User.email
)
date = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
date.comment = 'The date the DeliveryNote initiated'
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amount = db.Column(db.Integer, check_range('amount', min=0, max=100), default=0)
# The following fields are supposed to be 0:N relationships
# to SnapshotDelivery entity.
# At this stage of implementation they will treated as a
# comma-separated string of the devices expexted/transfered
expected_devices = db.Column(JSONB, nullable=False)
# expected_devices = db.Column(db.ARRAY(JSONB, dimensions=1), nullable=False)
transferred_devices = db.Column(db.ARRAY(db.Integer, dimensions=1), nullable=True)
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transfer_state = db.Column(
IntEnum(TransferState), default=TransferState.Initial, nullable=False
)
transfer_state.comment = TransferState.__doc__
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lot_id = db.Column(UUID(as_uuid=True), db.ForeignKey(Lot.id), nullable=False)
lot = db.relationship(
Lot,
backref=db.backref('deliverynote', uselist=False, lazy=True),
lazy=True,
primaryjoin=Lot.id == lot_id,
)
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def __init__(
self,
document_id: str,
amount: str,
date,
supplier_email: str,
expected_devices: Iterable,
transfer_state: TransferState,
) -> None:
"""Initializes a delivery note"""
super().__init__(
id=uuid.uuid4(),
document_id=document_id,
amount=amount,
date=date,
supplier_email=supplier_email,
expected_devices=expected_devices,
transfer_state=transfer_state,
)
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@property
def type(self) -> str:
return self.__class__.__name__
@property
def url(self) -> urlutils.URL:
"""The URL where to GET this action."""
return urlutils.URL(url_for_resource(Deliverynote, item_id=self.id))
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def delete(self):
"""Deletes the deliverynote.
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This method removes the delivery note.
"""
db.session.delete(self)
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def __repr__(self) -> str:
return '<Deliverynote {0.document_id}>'.format(self)