44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
"""channel aliases across department sections
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Revision ID: 0011
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Revises: 0010
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Create Date: 2026-06-08
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = "0011"
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down_revision: Union[str, None] = "0010"
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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 upgrade() -> None:
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op.add_column("channels", sa.Column("source_channel_id", sa.Integer(), nullable=True))
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op.create_foreign_key(
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"fk_channels_source_channel_id",
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"channels",
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"channels",
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["source_channel_id"],
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["id"],
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ondelete="SET NULL",
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)
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op.drop_constraint("channels_identifier_key", "channels", type_="unique")
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op.create_unique_constraint(
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"uq_channels_section_identifier",
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"channels",
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["section_id", "identifier"],
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)
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op.create_index("ix_channels_source_channel_id", "channels", ["source_channel_id"])
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def downgrade() -> None:
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op.drop_index("ix_channels_source_channel_id", table_name="channels")
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op.drop_constraint("uq_channels_section_identifier", "channels", type_="unique")
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op.create_unique_constraint("channels_identifier_key", "channels", ["identifier"])
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op.drop_constraint("fk_channels_source_channel_id", "channels", type_="foreignkey")
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op.drop_column("channels", "source_channel_id")
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