63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
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"""Add memory sharing tables.
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Revision ID: 004
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Revises: 003
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Create Date: 2026-03-22
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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revision: str = "004"
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down_revision: Union[str, None] = "003"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def _table_exists(conn, table_name: str) -> bool:
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result = conn.execute(
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sa.text(
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"SELECT EXISTS(SELECT 1 FROM information_schema.tables "
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"WHERE table_name = :tbl)"
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),
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{"tbl": table_name},
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)
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return result.scalar()
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def upgrade() -> None:
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conn = op.get_bind()
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if not _table_exists(conn, "memory_shares"):
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op.create_table(
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"memory_shares",
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sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
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sa.Column("memory_id", sa.Integer, sa.ForeignKey("memories.id"), nullable=False),
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sa.Column("owner_id", sa.String(100), nullable=False),
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sa.Column("shared_with", sa.String(100), nullable=False),
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sa.Column("permission", sa.String(10), nullable=False, server_default="read"),
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sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("NOW()")),
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sa.UniqueConstraint("memory_id", "shared_with", name="uq_memory_shares_memory_user"),
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)
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op.create_index("idx_shares_shared_with", "memory_shares", ["shared_with"])
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op.create_index("idx_shares_memory_id", "memory_shares", ["memory_id"])
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if not _table_exists(conn, "tag_shares"):
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op.create_table(
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"tag_shares",
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sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
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sa.Column("owner_id", sa.String(100), nullable=False),
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sa.Column("tag", sa.String(100), nullable=False),
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sa.Column("shared_with", sa.String(100), nullable=False),
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sa.Column("permission", sa.String(10), nullable=False, server_default="read"),
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sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("NOW()")),
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sa.UniqueConstraint("owner_id", "tag", "shared_with", name="uq_tag_shares_owner_tag_user"),
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)
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op.create_index("idx_tag_shares_shared_with", "tag_shares", ["shared_with"])
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def downgrade() -> None:
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op.drop_table("tag_shares")
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op.drop_table("memory_shares")
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