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101 lines
3.1 KiB
Python
101 lines
3.1 KiB
Python
"""Add bonus assignment disputes support
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Revision ID: 021_add_bonus_disputes
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Revises: 020_add_game_types
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Create Date: 2024-12-29
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy import inspect
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# revision identifiers, used by Alembic.
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revision: str = '021_add_bonus_disputes'
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down_revision: Union[str, None] = '020_add_game_types'
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def column_exists(table_name: str, column_name: str) -> bool:
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bind = op.get_bind()
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inspector = inspect(bind)
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columns = [col['name'] for col in inspector.get_columns(table_name)]
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return column_name in columns
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def constraint_exists(table_name: str, constraint_name: str) -> bool:
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bind = op.get_bind()
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inspector = inspect(bind)
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constraints = inspector.get_unique_constraints(table_name)
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return any(c['name'] == constraint_name for c in constraints)
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def upgrade() -> None:
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bind = op.get_bind()
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# Add bonus_assignment_id column to disputes
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if not column_exists('disputes', 'bonus_assignment_id'):
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op.add_column('disputes', sa.Column(
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'bonus_assignment_id',
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sa.Integer(),
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nullable=True
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))
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op.create_foreign_key(
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'fk_disputes_bonus_assignment_id',
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'disputes',
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'bonus_assignments',
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['bonus_assignment_id'],
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['id'],
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ondelete='CASCADE'
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)
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op.create_index('ix_disputes_bonus_assignment_id', 'disputes', ['bonus_assignment_id'])
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# Drop the unique index on assignment_id first (required before making nullable)
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if bind.dialect.name != 'sqlite':
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try:
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op.drop_index('ix_disputes_assignment_id', 'disputes')
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except Exception:
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pass # Index might not exist
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# Make assignment_id nullable (PostgreSQL only, SQLite doesn't support ALTER COLUMN)
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if bind.dialect.name != 'sqlite':
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op.alter_column('disputes', 'assignment_id', nullable=True)
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# Create a non-unique index on assignment_id
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try:
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op.create_index('ix_disputes_assignment_id_non_unique', 'disputes', ['assignment_id'])
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except Exception:
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pass # Index might already exist
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def downgrade() -> None:
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bind = op.get_bind()
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# Remove non-unique index
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try:
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op.drop_index('ix_disputes_assignment_id_non_unique', table_name='disputes')
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except Exception:
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pass
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# Make assignment_id not nullable again
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if bind.dialect.name != 'sqlite':
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op.alter_column('disputes', 'assignment_id', nullable=False)
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# Recreate unique index
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try:
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op.create_index('ix_disputes_assignment_id', 'disputes', ['assignment_id'], unique=True)
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except Exception:
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pass
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# Remove foreign key, index and column
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if column_exists('disputes', 'bonus_assignment_id'):
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try:
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op.drop_constraint('fk_disputes_bonus_assignment_id', 'disputes', type_='foreignkey')
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except Exception:
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pass
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op.drop_index('ix_disputes_bonus_assignment_id', table_name='disputes')
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op.drop_column('disputes', 'bonus_assignment_id')
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