73 lines
2.7 KiB
Python
73 lines
2.7 KiB
Python
"""add ticket_number to ticket
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Revision ID: 20251208_add_ticket_number_to_ticket
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Revises: 20251208_add_contact_person_and_phone_to_ticket
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Create Date: 2025-12-08 11:35:00.000000
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"""
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy import text
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from sqlalchemy.engine import reflection
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# revision identifiers, used by Alembic.
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revision = '20251208_add_ticket_number_to_ticket'
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down_revision = '20251208_add_contact_person_and_phone_to_ticket'
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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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# 检查列是否已存在
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bind = op.get_bind()
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inspector = reflection.Inspector.from_engine(bind)
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columns = inspector.get_columns('ticket')
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column_names = [column['name'] for column in columns]
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# 只有当列不存在时才添加
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if 'ticket_number' not in column_names:
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with op.batch_alter_table('ticket', schema=None) as batch_op:
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batch_op.add_column(sa.Column('ticket_number', sa.String(length=32), nullable=True))
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batch_op.create_unique_constraint('uq_ticket_ticket_number', ['ticket_number'])
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# 为现有记录生成工单编号
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connection = op.get_bind()
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result = connection.execute(text("SELECT ticket_id FROM ticket WHERE ticket_number IS NULL"))
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ticket_ids = [row[0] for row in result]
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for ticket_id in ticket_ids:
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# 生成工单编号
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import datetime
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import random
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date_str = datetime.datetime.now().strftime('%Y%m%d')
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random_str = str(random.randint(1000, 9999))
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ticket_number = f"TKT{date_str}{random_str}"
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# 更新记录
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connection.execute(
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text("UPDATE ticket SET ticket_number = :ticket_number WHERE ticket_id = :ticket_id"),
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{"ticket_number": ticket_number, "ticket_id": ticket_id}
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)
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# 设置字段为非空
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with op.batch_alter_table('ticket', schema=None) as batch_op:
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batch_op.alter_column('ticket_number', nullable=False)
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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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# 检查列是否已存在
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bind = op.get_bind()
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inspector = reflection.Inspector.from_engine(bind)
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columns = inspector.get_columns('ticket')
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column_names = [column['name'] for column in columns]
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# 只有当列存在时才删除
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if 'ticket_number' in column_names:
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with op.batch_alter_table('ticket', schema=None) as batch_op:
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batch_op.drop_constraint('uq_ticket_ticket_number', type_='unique')
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batch_op.drop_column('ticket_number')
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# ### end Alembic commands ### |