50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
"""Add DOI column to publications.
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Revision ID: 20260220_0011
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Revises: 20260219_0010
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Create Date: 2026-02-20 13:35:00.000000
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"""
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from collections.abc import Sequence
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from alembic import op
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import sqlalchemy as sa
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revision: str = "20260220_0011"
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down_revision: str | Sequence[str] | None = "20260219_0010"
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branch_labels: str | Sequence[str] | None = None
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depends_on: str | Sequence[str] | None = None
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def _has_column(inspector: sa.Inspector, table_name: str, column_name: str) -> bool:
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for column in inspector.get_columns(table_name):
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if str(column.get("name")) == column_name:
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return True
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return False
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def upgrade() -> None:
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bind = op.get_bind()
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inspector = sa.inspect(bind)
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table_names = set(inspector.get_table_names())
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if "publications" not in table_names:
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return
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if not _has_column(inspector, "publications", "doi"):
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op.add_column("publications", sa.Column("doi", sa.String(length=255), nullable=True))
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index_names = {index["name"] for index in inspector.get_indexes("publications")}
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if "ix_publications_doi" not in index_names:
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op.create_index("ix_publications_doi", "publications", ["doi"], unique=False)
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def downgrade() -> None:
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bind = op.get_bind()
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inspector = sa.inspect(bind)
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table_names = set(inspector.get_table_names())
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if "publications" not in table_names:
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return
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index_names = {index["name"] for index in inspector.get_indexes("publications")}
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if "ix_publications_doi" in index_names:
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op.drop_index("ix_publications_doi", table_name="publications")
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if _has_column(inspector, "publications", "doi"):
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op.drop_column("publications", "doi")
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