59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
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"""Add UUID to file_attachments
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Revision ID: e9515e29ef8b
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Revises: c5b574480b80
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Create Date: 2026-03-20 21:58:22.006727
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"""
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from alembic import op
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import sqlalchemy as sa
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import uuid
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# revision identifiers, used by Alembic.
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revision = 'e9515e29ef8b'
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down_revision = 'c5b574480b80'
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branch_labels = None
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depends_on = None
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def upgrade():
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# ### commands auto generated by Alembic - please adjust! ###
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# Step 1: Add UUID column as nullable
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op.add_column('file_attachments', sa.Column('uuid', sa.String(length=36), nullable=True))
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# Step 2: Populate UUID for existing rows
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from sqlalchemy.sql import table, column, select, update
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file_attachments_table = table('file_attachments',
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column('id', sa.Integer),
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column('uuid', sa.String(36))
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)
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connection = op.get_bind()
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# Get all existing file attachments
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result = connection.execute(select(file_attachments_table.c.id))
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for row in result:
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new_uuid = str(uuid.uuid4())
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connection.execute(
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file_attachments_table.update()
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.where(file_attachments_table.c.id == row[0])
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.values(uuid=new_uuid)
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)
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# Step 3: Make UUID not null and add constraints
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op.alter_column('file_attachments', 'uuid', nullable=False)
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op.create_index('ix_file_attachments_uuid', 'file_attachments', ['uuid'], unique=False)
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op.create_unique_constraint('uq_file_attachments_uuid', 'file_attachments', ['uuid'])
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# ### end Alembic commands ###
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def downgrade():
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# ### commands auto generated by Alembic - please adjust! ###
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op.drop_constraint('uq_file_attachments_uuid', 'file_attachments', type_='unique')
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op.drop_index('ix_file_attachments_uuid', table_name='file_attachments')
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op.drop_column('file_attachments', 'uuid')
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# ### end Alembic commands ###
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