feauture/catalogo-clases-inventario-UME

backend/alembic/versions/c8d9e0f1a2b3_add_stock_unit_of_measure_to_classes.py

@@ -0,0 +1,43 @@
+"""add stock_unit_of_measure to classes
+
+Revision ID: c8d9e0f1a2b3
+Revises: b3c4d5e6f7a8
+Create Date: 2026-06-02 12:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "c8d9e0f1a2b3"
+down_revision: Union[str, None] = "b3c4d5e6f7a8"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "classes",
+        sa.Column("stock_unit_of_measure", sa.String(length=5), nullable=True),
+        schema="a76",
+    )
+    op.create_foreign_key(
+        "fk_classes_stock_uom",
+        "classes",
+        "units_of_measure",
+        ["stock_unit_of_measure", "tenant_id", "company_id"],
+        ["code", "tenant_id", "company_id"],
+        source_schema="a76",
+        referent_schema="a76",
+    )
+
+
+def downgrade() -> None:
+    op.drop_constraint(
+        "fk_classes_stock_uom",
+        "classes",
+        schema="a76",
+        type_="foreignkey",
+    )
+    op.drop_column("classes", "stock_unit_of_measure", schema="a76")