"""Multi Tenant Support
Revision ID: c946955da633
Revises: 211ab850ef3d
Create Date: 2025-11-04 18:11:09.325158
"""
from typing import Sequence, Union
from datetime import datetime, timezone
from uuid import uuid4
from alembic import op
import sqlalchemy as sa
# revision identifiers, used by Alembic.
revision: str = "c946955da633"
down_revision: Union[str, None] = "211ab850ef3d"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None
def _now():
return datetime.now(timezone.utc)
def _define_user_table() -> sa.Table:
table = sa.Table(
"users",
sa.MetaData(),
sa.Column(
"id",
sa.UUID,
sa.ForeignKey("principals.id", ondelete="CASCADE"),
primary_key=True,
nullable=False,
),
sa.Column("tenant_id", sa.UUID, sa.ForeignKey("tenants.id"), index=True, nullable=True),
)
return table
def _define_dataset_table() -> sa.Table:
# Note: We can't use any Cognee model info to gather data (as it can change) in database so we must use our own table
# definition or load what is in the database
table = sa.Table(
"datasets",
sa.MetaData(),
sa.Column("id", sa.UUID, primary_key=True, default=uuid4),
sa.Column("name", sa.Text),
sa.Column(
"created_at",
sa.DateTime(timezone=True),
default=lambda: datetime.now(timezone.utc),
),
sa.Column(
"updated_at",
sa.DateTime(timezone=True),
onupdate=lambda: datetime.now(timezone.utc),
),
sa.Column("owner_id", sa.UUID(), sa.ForeignKey("principals.id"), index=True),
sa.Column("tenant_id", sa.UUID(), sa.ForeignKey("tenants.id"), index=True, nullable=True),
)
return table
def _get_column(inspector, table, name, schema=None):
for col in inspector.get_columns(table, schema=schema):
if col["name"] == name:
return col
return None
def upgrade() -> None:
conn = op.get_bind()
insp = sa.inspect(conn)
dataset = _define_dataset_table()
user = _define_user_table()
if "user_tenants" not in insp.get_table_names():
# Define table with all necessary columns including primary key
user_tenants = op.create_table(
"user_tenants",
sa.Column("user_id", sa.UUID, sa.ForeignKey("users.id"), primary_key=True),
sa.Column("tenant_id", sa.UUID, sa.ForeignKey("tenants.id"), primary_key=True),
sa.Column(
"created_at", sa.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
),
)
# Get all users with their tenant_id
user_data = conn.execute(
sa.select(user.c.id, user.c.tenant_id).where(user.c.tenant_id.isnot(None))
).fetchall()
# Insert into user_tenants table
if user_data:
op.bulk_insert(
user_tenants,
[
{"user_id": user_id, "tenant_id": tenant_id, "created_at": _now()}
for user_id, tenant_id in user_data
],
)
tenant_id_column = _get_column(insp, "datasets", "tenant_id")
if not tenant_id_column:
op.add_column("datasets", sa.Column("tenant_id", sa.UUID(), nullable=True))
# Build subquery, select users.tenant_id for each dataset.owner_id
tenant_id_from_dataset_owner = (
sa.select(user.c.tenant_id).where(user.c.id == dataset.c.owner_id).scalar_subquery()
)
if op.get_context().dialect.name == "sqlite":
# If column doesn't exist create new original_extension column and update from values of extension column
with op.batch_alter_table("datasets") as batch_op:
batch_op.execute(
dataset.update().values(
tenant_id=tenant_id_from_dataset_owner,
)
)
else:
conn = op.get_bind()
conn.execute(dataset.update().values(tenant_id=tenant_id_from_dataset_owner))
op.create_index(op.f("ix_datasets_tenant_id"), "datasets", ["tenant_id"])
def downgrade() -> None:
# ### commands auto generated by Alembic - please adjust! ###
op.drop_table("user_tenants")
op.drop_index(op.f("ix_datasets_tenant_id"), table_name="datasets")
op.drop_column("datasets", "tenant_id")
# ### end Alembic commands ###
