hexware/fastapi-dls
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refactored database structure and created migration script

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This commit is contained in:
Oscar Krause 2022-12-29 09:40:36 +01:00
parent 1a50e28202
commit 922dc9f5a7
2 changed files with 27 additions and 12 deletions
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4
app/main.py
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@ -20,7 +20,7 @@ from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from util import load_key, load_file
from orm import Origin, Lease, init as db_init
from orm import Origin, Lease, init as db_init, migrate
logger = logging.getLogger()
load_dotenv('../version.env')
@ -29,7 +29,7 @@ VERSION, COMMIT, DEBUG = env('VERSION', 'unknown'), env('COMMIT', 'unknown'), bo
app = FastAPI(title='FastAPI-DLS', description='Minimal Delegated License Service (DLS).', version=VERSION)
db = create_engine(str(env('DATABASE', 'sqlite:///db.sqlite')))
db_init(db)
db_init(db), migrate(db)
DLS_URL = str(env('DLS_URL', 'localhost'))
DLS_PORT = int(env('DLS_PORT', '443'))

35
app/orm.py
View File

@ -1,6 +1,6 @@
import datetime
from sqlalchemy import Column, VARCHAR, CHAR, ForeignKey, DATETIME, UniqueConstraint, update, and_, delete, inspect
from sqlalchemy import Column, VARCHAR, CHAR, ForeignKey, DATETIME, update, and_, inspect
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.engine import Engine
from sqlalchemy.orm import sessionmaker
@ -43,13 +43,13 @@ class Origin(Base):
if entity is None:
session.add(origin)
else:
values = dict(
x = dict(
hostname=origin.hostname,
guest_driver_version=origin.guest_driver_version,
os_platform=origin.os_platform,
os_version=origin.os_version,
os_version=origin.os_version
)
session.execute(update(Origin).where(Origin.origin_ref == origin.origin_ref).values(**values))
session.execute(update(Origin).where(Origin.origin_ref == origin.origin_ref).values(**x))
session.commit()
session.flush()
session.close()
@ -58,9 +58,9 @@ class Origin(Base):
class Lease(Base):
__tablename__ = "lease"
origin_ref = Column(CHAR(length=36), ForeignKey(Origin.origin_ref), primary_key=True, nullable=False, index=True) # uuid4
lease_ref = Column(CHAR(length=36), primary_key=True, nullable=False, index=True) # uuid4
origin_ref = Column(CHAR(length=36), ForeignKey(Origin.origin_ref), nullable=False, index=True) # uuid4
lease_created = Column(DATETIME(), nullable=False)
lease_expires = Column(DATETIME(), nullable=False)
lease_updated = Column(DATETIME(), nullable=False)
@ -85,14 +85,14 @@ class Lease(Base):
@staticmethod
def create_or_update(engine: Engine, lease: "Lease"):
session = sessionmaker(bind=engine)()
entity = session.query(Lease).filter(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).first()
entity = session.query(Lease).filter(Lease.lease_ref == lease.lease_ref).first()
if entity is None:
if lease.lease_updated is None:
lease.lease_updated = lease.lease_created
session.add(lease)
else:
values = dict(lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
session.execute(update(Lease).where(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).values(**values))
x = dict(origin_ref=lease.origin_ref, lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
session.execute(update(Lease).where(Lease.lease_ref == lease.lease_ref).values(**x))
session.commit()
session.flush()
session.close()
@ -114,8 +114,8 @@ class Lease(Base):
@staticmethod
def renew(engine: Engine, lease: "Lease", lease_expires: datetime.datetime, lease_updated: datetime.datetime):
session = sessionmaker(bind=engine)()
values = dict(lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
session.execute(update(Lease).where(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).values(**values))
x = dict(lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
session.execute(update(Lease).where(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).values(**x))
session.commit()
session.close()
@ -137,3 +137,18 @@ def init(engine: Engine):
session.execute(str(table.create_statement(engine)))
session.commit()
session.close()
def migrate(engine: Engine):
db = inspect(engine)
def upgrade_1_0_to_1_1():
x = db.dialect.get_columns(engine.connect(), Lease.__tablename__)
x = next(_ for _ in x if _['name'] == 'origin_ref')
if x['primary_key'] > 0:
print('Found old database schema with "origin_ref" as primary-key in "lease" table. Dropping table!')
print(' Your leases are recreated on next renewal!')
print(' If an error message appears on the client, you can ignore it.')
Lease.__table__.drop(bind=engine)
upgrade_1_0_to_1_1()