"""add expense case and transactional business event tables This is the first migration-owned schema slice in a legacy database that still bootstraps older tables through SQLAlchemy metadata. The server startup runs this revision before the legacy bootstrap, and the legacy bootstrap explicitly excludes these migration-owned tables. Revision ID: 20260713_0001 Revises: Create Date: 2026-07-13 11:45:00 """ from collections.abc import Sequence import sqlalchemy as sa from alembic import op revision: str = "20260713_0001" down_revision: str | None = None branch_labels: str | Sequence[str] | None = None depends_on: str | Sequence[str] | None = None def upgrade() -> None: op.create_table( "expense_cases", sa.Column("id", sa.String(length=36), nullable=False), sa.Column("tenant_id", sa.String(length=64), nullable=False), sa.Column("case_no", sa.String(length=80), nullable=False), sa.Column("scene_code", sa.String(length=50), nullable=False), sa.Column("title", sa.String(length=200), nullable=False), sa.Column("owner_employee_id", sa.String(length=36), nullable=True), sa.Column("current_stage", sa.String(length=40), nullable=False), sa.Column("status", sa.String(length=30), nullable=False), sa.Column( "created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False, ), sa.Column( "updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False, ), sa.PrimaryKeyConstraint("id"), sa.UniqueConstraint("tenant_id", "case_no", name="uq_expense_cases_tenant_case_no"), ) op.create_index("ix_expense_cases_tenant_id", "expense_cases", ["tenant_id"]) op.create_index("ix_expense_cases_owner_employee_id", "expense_cases", ["owner_employee_id"]) op.create_index( "ix_expense_cases_tenant_stage", "expense_cases", ["tenant_id", "current_stage"], ) op.create_index( "ix_expense_cases_tenant_status", "expense_cases", ["tenant_id", "status"], ) op.create_table( "expense_case_links", sa.Column("id", sa.String(length=36), nullable=False), sa.Column("tenant_id", sa.String(length=64), nullable=False), sa.Column("expense_case_id", sa.String(length=36), nullable=False), sa.Column("resource_type", sa.String(length=50), nullable=False), sa.Column("resource_id", sa.String(length=100), nullable=False), sa.Column("relation_type", sa.String(length=50), nullable=False), sa.Column( "created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False, ), sa.ForeignKeyConstraint(["expense_case_id"], ["expense_cases.id"], ondelete="CASCADE"), sa.PrimaryKeyConstraint("id"), sa.UniqueConstraint("resource_type", "resource_id", name="uq_expense_case_links_resource"), ) op.create_index("ix_expense_case_links_tenant_id", "expense_case_links", ["tenant_id"]) op.create_index( "ix_expense_case_links_tenant_case", "expense_case_links", ["tenant_id", "expense_case_id"], ) op.create_table( "business_events", sa.Column("id", sa.String(length=36), nullable=False), sa.Column("tenant_id", sa.String(length=64), nullable=False), sa.Column("expense_case_id", sa.String(length=36), nullable=False), sa.Column("aggregate_type", sa.String(length=50), nullable=False), sa.Column("aggregate_id", sa.String(length=100), nullable=False), sa.Column("event_type", sa.String(length=80), nullable=False), sa.Column("event_version", sa.Integer(), nullable=False), sa.Column("idempotency_key", sa.String(length=120), nullable=False), sa.Column("correlation_id", sa.String(length=64), nullable=False), sa.Column("causation_id", sa.String(length=64), nullable=True), sa.Column("actor_id", sa.String(length=120), nullable=False), sa.Column("actor_type", sa.String(length=30), nullable=False), sa.Column("payload_json", sa.JSON(), nullable=False), sa.Column("delivery_status", sa.String(length=20), nullable=False), sa.Column("delivery_attempts", sa.Integer(), nullable=False), sa.Column("last_delivery_error", sa.Text(), nullable=True), sa.Column( "occurred_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False, ), sa.Column("published_at", sa.DateTime(timezone=True), nullable=True), sa.ForeignKeyConstraint(["expense_case_id"], ["expense_cases.id"], ondelete="CASCADE"), sa.PrimaryKeyConstraint("id"), sa.UniqueConstraint( "tenant_id", "aggregate_type", "aggregate_id", "event_type", "idempotency_key", name="uq_business_event_idempotency", ), ) op.create_index("ix_business_events_tenant_id", "business_events", ["tenant_id"]) op.create_index("ix_business_events_event_type", "business_events", ["event_type"]) op.create_index("ix_business_events_correlation_id", "business_events", ["correlation_id"]) op.create_index( "ix_business_events_tenant_case_time", "business_events", ["tenant_id", "expense_case_id", "occurred_at"], ) op.create_index( "ix_business_events_outbox", "business_events", ["delivery_status", "occurred_at"], ) op.create_index( "ix_business_events_aggregate", "business_events", ["aggregate_type", "aggregate_id"], ) def downgrade() -> None: op.drop_index("ix_business_events_aggregate", table_name="business_events") op.drop_index("ix_business_events_outbox", table_name="business_events") op.drop_index("ix_business_events_tenant_case_time", table_name="business_events") op.drop_index("ix_business_events_correlation_id", table_name="business_events") op.drop_index("ix_business_events_event_type", table_name="business_events") op.drop_index("ix_business_events_tenant_id", table_name="business_events") op.drop_table("business_events") op.drop_index("ix_expense_case_links_tenant_case", table_name="expense_case_links") op.drop_index("ix_expense_case_links_tenant_id", table_name="expense_case_links") op.drop_table("expense_case_links") op.drop_index("ix_expense_cases_tenant_status", table_name="expense_cases") op.drop_index("ix_expense_cases_tenant_stage", table_name="expense_cases") op.drop_index("ix_expense_cases_owner_employee_id", table_name="expense_cases") op.drop_index("ix_expense_cases_tenant_id", table_name="expense_cases") op.drop_table("expense_cases")