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alembic/versions/20260222_0016_add_publication_identifiers.py

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+"""Add publication identifiers table.
+
+Revision ID: 20260222_0016
+Revises: 20260221_0015
+Create Date: 2026-02-22 12:45:00.000000
+"""
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260222_0016"
+down_revision: str | Sequence[str] | None = "20260221_0015"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def _table_names() -> set[str]:
+    bind = op.get_bind()
+    inspector = sa.inspect(bind)
+    return set(inspector.get_table_names())
+
+
+def _create_publication_identifiers_table() -> None:
+    op.create_table(
+        "publication_identifiers",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("publication_id", sa.Integer(), nullable=False),
+        sa.Column("kind", sa.String(length=32), nullable=False),
+        sa.Column("value_raw", sa.Text(), nullable=False),
+        sa.Column("value_normalized", sa.String(length=255), nullable=False),
+        sa.Column("source", sa.String(length=64), nullable=False),
+        sa.Column(
+            "confidence_score",
+            sa.Float(),
+            nullable=False,
+            server_default=sa.text("0"),
+        ),
+        sa.Column("evidence_url", sa.Text(), nullable=True),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.CheckConstraint(
+            "confidence_score >= 0 AND confidence_score <= 1",
+            name="publication_identifiers_confidence_score_range",
+        ),
+        sa.ForeignKeyConstraint(
+            ["publication_id"],
+            ["publications.id"],
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_publication_identifiers")),
+        sa.UniqueConstraint(
+            "publication_id",
+            "kind",
+            "value_normalized",
+            name="uq_publication_identifiers_publication_kind_value",
+        ),
+    )
+
+
+def _create_publication_identifiers_indexes() -> None:
+    op.create_index(
+        "ix_publication_identifiers_kind_value",
+        "publication_identifiers",
+        ["kind", "value_normalized"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_publication_identifiers_publication_id",
+        "publication_identifiers",
+        ["publication_id"],
+        unique=False,
+    )
+
+
+def _drop_publication_identifiers_indexes() -> None:
+    op.drop_index("ix_publication_identifiers_publication_id", table_name="publication_identifiers")
+    op.drop_index("ix_publication_identifiers_kind_value", table_name="publication_identifiers")
+
+
+def upgrade() -> None:
+    if "publication_identifiers" in _table_names():
+        return
+    _create_publication_identifiers_table()
+    _create_publication_identifiers_indexes()
+
+
+def downgrade() -> None:
+    if "publication_identifiers" not in _table_names():
+        return
+    _drop_publication_identifiers_indexes()
+    op.drop_table("publication_identifiers")