mirror of
https://github.com/rennf93/roboco.git
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62 lines
2.7 KiB
Python
62 lines
2.7 KiB
Python
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"""Drop the channels/groups/sessions/session_tasks/messages subsystem.
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Channels, groups, discussion-sessions, and messages are retired — A2A is
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now the single directed-message channel agents read, and coordination
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rests on the task state machine + task details (see
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docs/internal/specs/2026-07-03-comms-teardown-trace.md). All backend code
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that read/wrote these tables was removed first (roboco commits preceding
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this one); this migration is the last step, once nothing touches them.
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Revision ID: 060_drop_messaging
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Revises: 059_x_credentials
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Create Date: 2026-07-03
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"""
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from __future__ import annotations
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from alembic import op
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revision = "060_drop_messaging"
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down_revision = "059_x_credentials"
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branch_labels: dict[str, str] | None = None
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depends_on: dict[str, str] | None = None
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def upgrade() -> None:
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# Dropping the column drops its FK automatically, regardless of the
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# constraint's actual name — sidesteps having to hardcode it. (The
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# naming-convention name would be fk_journal_entries_session_id_sessions
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# per db/base.py's convention, and that IS what a live DB shows, but
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# 001_initial_schema.py created it via a raw op.create_table() against
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# a throwaway MetaData(), so the convention isn't guaranteed to apply —
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# op.drop_column is correct either way.)
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op.drop_column("journal_entries", "session_id")
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# Drop order follows the FK chain: messages -> session_tasks -> sessions
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# -> groups -> channels.
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op.drop_table("messages")
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op.drop_table("session_tasks")
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op.drop_table("sessions")
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op.drop_table("groups")
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op.drop_table("channels")
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# The CONVERSATIONS RAG chunk table is runtime-provisioned (CREATE TABLE
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# IF NOT EXISTS, migration 030's index plugin) — not alembic-managed, so
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# it survives the model deletion unless dropped explicitly here.
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op.execute("DROP TABLE IF EXISTS chunks_conversations")
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# messagetype is dropped because MessageTable (the only column that used
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# it) is gone, but the MessageType Python enum stays — ExtractedMessage
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# (kept, extraction pipeline) still uses it, and was never itself
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# persisted to messages/MessageTable. The DB type and the Python enum
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# are independent; dropping the now-unused DB type is safe.
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for t in ("messagetype", "sessionstatus", "sessionscope", "channeltype"):
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op.execute(f"DROP TYPE IF EXISTS {t}")
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def downgrade() -> None:
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# One-way removal — recreating the dropped tables/types/column would
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# need the full original schema (channels/groups/sessions/session_tasks/
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# messages + 4 enum types), and nothing depends on restoring it.
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raise NotImplementedError("060_drop_messaging is a one-way removal")
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