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import datetime
from sqlalchemy import Column, Integer, String, Text, DateTime, \
Sequence, Boolean, ForeignKey, SmallInteger
from sqlalchemy.orm import relation
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.schema import MetaData
metadata = MetaData()
ModelBase = declarative_base(metadata=metadata)
class Queue(ModelBase):
__tablename__ = "kombu_queue"
__table_args__ = {"sqlite_autoincrement": True, 'mysql_engine': 'InnoDB'}
id = Column(Integer, Sequence("queue_id_sequence"), primary_key=True,
autoincrement=True)
name = Column(String(200), unique=True)
messages = relation("Message", backref="queue", lazy="noload")
def __init__(self, name):
self.name = name
def __str__(self):
return "<Queue(%s)>" % (self.name)
class Message(ModelBase):
__tablename__ = "kombu_message"
__table_args__ = {"sqlite_autoincrement": True, 'mysql_engine': 'InnoDB'}
id = Column(Integer, Sequence("message_id_sequence"), primary_key=True,
autoincrement=True)
visible = Column(Boolean, default=True, index=True)
sent_at = Column('timestamp', DateTime, nullable=True, index=True,
onupdate=datetime.datetime.now)
payload = Column(Text, nullable=False)
queue_id = Column(Integer, ForeignKey("kombu_queue.id",
name="FK_kombu_message_queue"))
version = Column(SmallInteger, nullable=False, default=1)
__mapper_args__ = {"version_id_col": version}
def __init__(self, payload, queue):
self.payload = payload
self.queue = queue
def __str__(self):
return "<Message(%s, %s, %s, %s)>" % (self.visible,
self.sent_at,
self.payload,
self.queue_id)
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