44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
"""printedparts: printeditemtransactions.revision (traceability)
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Records which print-file revision the physical part carried when it was taken,
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captured from the label QR (gage tag + revision). Nullable - manual entry and
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pre-QR labels have no revision. Idempotent guard.
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Revision ID: printedparts0004txnrev
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Revises: printedparts0003gagetag
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Create Date: 2026-07-21
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"""
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from alembic import op
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import sqlalchemy as sa
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revision = 'printedparts0004txnrev'
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down_revision = 'printedparts0003gagetag'
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branch_labels = None
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depends_on = None
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def _has_col(insp):
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return any(c['name'] == 'revision'
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for c in insp.get_columns('printeditemtransactions'))
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def upgrade():
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bind = op.get_bind()
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insp = sa.inspect(bind)
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if 'printeditemtransactions' not in insp.get_table_names():
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return
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if not _has_col(insp):
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op.add_column('printeditemtransactions',
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sa.Column('revision', sa.Integer(), nullable=True))
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def downgrade():
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bind = op.get_bind()
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insp = sa.inspect(bind)
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if 'printeditemtransactions' not in insp.get_table_names():
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return
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if _has_col(insp):
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op.drop_column('printeditemtransactions', 'revision')
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