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app/.venv/Lib/site-packages/kombu/transport/sqlalchemy/models.py

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+"""Kombu transport using SQLAlchemy as the message store."""
+
+from __future__ import annotations
+
+import datetime
+
+from sqlalchemy import (Boolean, Column, DateTime, ForeignKey, Index, Integer,
+                        Sequence, SmallInteger, String, Text)
+from sqlalchemy.orm import relationship
+from sqlalchemy.schema import MetaData
+
+try:
+    from sqlalchemy.orm import declarative_base, declared_attr
+except ImportError:
+    # TODO: Remove this once we drop support for SQLAlchemy < 1.4.
+    from sqlalchemy.ext.declarative import declarative_base, declared_attr
+
+class_registry = {}
+metadata = MetaData()
+ModelBase = declarative_base(metadata=metadata, class_registry=class_registry)
+
+
+class Queue:
+    """The queue class."""
+
+    __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)
+
+    def __init__(self, name):
+        self.name = name
+
+    def __str__(self):
+        return f'<Queue({self.name})>'
+
+    @declared_attr
+    def messages(cls):
+        return relationship('Message', backref='queue', lazy='noload')
+
+
+class Message:
+    """The message class."""
+
+    __table_args__ = (
+        Index('ix_kombu_message_timestamp_id', 'timestamp', 'id'),
+        {'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)
+    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: {0.sent_at} {0.payload} {0.queue_id}>'.format(self)
+
+    @declared_attr
+    def queue_id(self):
+        return Column(
+            Integer,
+            ForeignKey(
+                '%s.id' % class_registry['Queue'].__tablename__,
+                name='FK_kombu_message_queue'
+            )
+        )