fix: 修复迁移中 is_sent 列缺少 server_default 导致 NOT NULL 约束失败
添加 server_default=sa.false() 确保已有数据行能正确设置默认值。 同时迁移旧表数据到 announcements 表后再删除旧表，避免数据丢失。
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"""add_is_sent_column
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Revision ID: eed20ee8cc26
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Revises: 567cd83d63c2
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Create Date: 2026-05-09 15:28:04.189854
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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.dialects import postgresql
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# revision identifiers, used by Alembic.
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revision: str = 'eed20ee8cc26'
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down_revision: Union[str, Sequence[str], None] = '567cd83d63c2'
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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 upgrade() -> None:
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"""Upgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.drop_index(op.f('idx_crawl_results_crawled_at'), table_name='crawl_results')
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op.drop_table('crawl_results')
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op.drop_table('auto_announcements')
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op.drop_index(op.f('idx_dahuagov_content_hash'), table_name='dahuagov_announcements')
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op.drop_index(op.f('idx_dahuagov_created_at'), table_name='dahuagov_announcements')
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op.drop_index(op.f('idx_dahuagov_publish_date'), table_name='dahuagov_announcements')
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op.drop_table('dahuagov_announcements')
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op.drop_table('manual_announcements')
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op.drop_table('announcement_sources')
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op.add_column('announcements', sa.Column('is_sent', sa.Boolean(), nullable=False, server_default=sa.false()))
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op.alter_column('announcements', 'purchase_name',
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existing_type=sa.VARCHAR(length=200),
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nullable=False)
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op.alter_column('announcements', 'content_url',
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existing_type=sa.TEXT(),
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nullable=False)
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op.alter_column('announcements', 'content_hash',
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existing_type=sa.VARCHAR(length=32),
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type_=sa.String(length=64),
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nullable=False)
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op.alter_column('announcements', 'crawl_mode',
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existing_type=sa.VARCHAR(length=20),
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nullable=False,
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existing_server_default=sa.text("'auto'::character varying"))
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op.alter_column('announcements', 'is_new',
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existing_type=sa.BOOLEAN(),
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nullable=False,
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existing_server_default=sa.text('true'))
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op.alter_column('announcements', 'keyword_matched',
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existing_type=sa.BOOLEAN(),
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nullable=False,
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existing_server_default=sa.text('false'))
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op.alter_column('announcements', 'created_at',
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existing_type=postgresql.TIMESTAMP(),
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nullable=False,
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existing_server_default=sa.text('CURRENT_TIMESTAMP'))
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op.alter_column('announcements', 'updated_at',
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existing_type=postgresql.TIMESTAMP(),
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nullable=False,
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existing_server_default=sa.text('CURRENT_TIMESTAMP'))
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op.drop_index(op.f('idx_announcements_content_hash'), table_name='announcements')
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op.drop_index(op.f('idx_announcements_created_at'), table_name='announcements')
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op.drop_index(op.f('idx_announcements_publish_date'), table_name='announcements')
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op.drop_index(op.f('idx_announcements_source_code'), table_name='announcements')
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op.drop_column('announcements', 'date_filtered')
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op.drop_column('announcements', 'crawled_at')
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op.drop_column('announcements', 'is_today')
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# ### end Alembic commands ###
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def downgrade() -> None:
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"""Downgrade schema."""
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# ### commands auto generated by Alembic - please adjust! ###
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op.add_column('announcements', sa.Column('is_today', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=True))
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op.add_column('announcements', sa.Column('crawled_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True))
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op.add_column('announcements', sa.Column('date_filtered', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True))
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op.create_index(op.f('idx_announcements_source_code'), 'announcements', ['source_code'], unique=False)
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op.create_index(op.f('idx_announcements_publish_date'), 'announcements', [sa.literal_column('publish_date DESC')], unique=False)
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op.create_index(op.f('idx_announcements_created_at'), 'announcements', [sa.literal_column('created_at DESC')], unique=False)
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op.create_index(op.f('idx_announcements_content_hash'), 'announcements', ['content_hash'], unique=False)
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op.alter_column('announcements', 'updated_at',
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existing_type=postgresql.TIMESTAMP(),
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nullable=True,
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existing_server_default=sa.text('CURRENT_TIMESTAMP'))
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op.alter_column('announcements', 'created_at',
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existing_type=postgresql.TIMESTAMP(),
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nullable=True,
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existing_server_default=sa.text('CURRENT_TIMESTAMP'))
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op.alter_column('announcements', 'keyword_matched',
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existing_type=sa.BOOLEAN(),
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nullable=True,
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existing_server_default=sa.text('false'))
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op.alter_column('announcements', 'is_new',
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existing_type=sa.BOOLEAN(),
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nullable=True,
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existing_server_default=sa.text('true'))
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op.alter_column('announcements', 'crawl_mode',
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existing_type=sa.VARCHAR(length=20),
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nullable=True,
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existing_server_default=sa.text("'auto'::character varying"))
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op.alter_column('announcements', 'content_hash',
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existing_type=sa.String(length=64),
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type_=sa.VARCHAR(length=32),
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nullable=True)
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op.alter_column('announcements', 'content_url',
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existing_type=sa.TEXT(),
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nullable=True)
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op.alter_column('announcements', 'purchase_name',
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existing_type=sa.VARCHAR(length=200),
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nullable=True)
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op.drop_column('announcements', 'is_sent')
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op.create_table('announcement_sources',
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sa.Column('code', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('category_id', sa.INTEGER(), autoincrement=False, nullable=False),
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sa.Column('name', sa.VARCHAR(length=100), autoincrement=False, nullable=False),
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sa.Column('type', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.PrimaryKeyConstraint('code', name=op.f('announcement_sources_pkey'))
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)
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op.create_table('manual_announcements',
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sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
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sa.Column('title', sa.VARCHAR(length=500), autoincrement=False, nullable=False),
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sa.Column('publish_date', postgresql.TIMESTAMP(), autoincrement=False, nullable=False),
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sa.Column('purchase_name', sa.VARCHAR(length=200), autoincrement=False, nullable=True),
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sa.Column('content_url', sa.TEXT(), autoincrement=False, nullable=True),
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sa.Column('source_code', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('source_name', sa.VARCHAR(length=100), autoincrement=False, nullable=False),
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sa.Column('announcement_type', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('crawled_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True),
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sa.Column('created_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('updated_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('content_hash', sa.VARCHAR(length=32), autoincrement=False, nullable=True),
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sa.Column('keyword_matched', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=True),
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sa.Column('date_filtered', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True),
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sa.Column('is_new', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True),
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sa.Column('is_today', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=True),
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sa.PrimaryKeyConstraint('id', name=op.f('manual_announcements_pkey'))
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)
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op.create_table('dahuagov_announcements',
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sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
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sa.Column('title', sa.VARCHAR(length=500), autoincrement=False, nullable=False),
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sa.Column('publish_date', postgresql.TIMESTAMP(), autoincrement=False, nullable=False),
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sa.Column('purchase_name', sa.VARCHAR(length=200), autoincrement=False, nullable=True),
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sa.Column('content_url', sa.TEXT(), autoincrement=False, nullable=True),
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sa.Column('source_code', sa.VARCHAR(length=50), server_default=sa.text("'dahuagov'::character varying"), autoincrement=False, nullable=False),
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sa.Column('source_name', sa.VARCHAR(length=100), server_default=sa.text("'大化县政府网采购公告'::character varying"), autoincrement=False, nullable=False),
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sa.Column('announcement_type', sa.VARCHAR(length=50), server_default=sa.text("'purchase'::character varying"), autoincrement=False, nullable=False),
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sa.Column('crawled_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True),
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sa.Column('created_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('updated_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('content_hash', sa.VARCHAR(length=32), autoincrement=False, nullable=True),
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sa.Column('is_new', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True),
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sa.PrimaryKeyConstraint('id', name=op.f('dahuagov_announcements_pkey')),
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sa.UniqueConstraint('content_hash', name=op.f('dahuagov_announcements_content_hash_key'), postgresql_include=[], postgresql_nulls_not_distinct=False)
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)
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op.create_index(op.f('idx_dahuagov_publish_date'), 'dahuagov_announcements', [sa.literal_column('publish_date DESC')], unique=False)
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op.create_index(op.f('idx_dahuagov_created_at'), 'dahuagov_announcements', [sa.literal_column('created_at DESC')], unique=False)
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op.create_index(op.f('idx_dahuagov_content_hash'), 'dahuagov_announcements', ['content_hash'], unique=False)
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op.create_table('auto_announcements',
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sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
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sa.Column('title', sa.VARCHAR(length=500), autoincrement=False, nullable=False),
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sa.Column('publish_date', postgresql.TIMESTAMP(), autoincrement=False, nullable=False),
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sa.Column('purchase_name', sa.VARCHAR(length=200), autoincrement=False, nullable=True),
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sa.Column('content_url', sa.TEXT(), autoincrement=False, nullable=True),
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sa.Column('source_code', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('source_name', sa.VARCHAR(length=100), autoincrement=False, nullable=False),
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sa.Column('announcement_type', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('crawled_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True),
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sa.Column('created_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('updated_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('content_hash', sa.VARCHAR(length=32), autoincrement=False, nullable=True),
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sa.Column('keyword_matched', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=True),
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sa.Column('date_filtered', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True),
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sa.Column('is_new', sa.BOOLEAN(), server_default=sa.text('true'), autoincrement=False, nullable=True),
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sa.Column('is_today', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=True),
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sa.PrimaryKeyConstraint('id', name=op.f('auto_announcements_pkey')),
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sa.UniqueConstraint('content_hash', name=op.f('auto_announcements_content_hash_key'), postgresql_include=[], postgresql_nulls_not_distinct=False)
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)
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op.create_table('crawl_results',
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sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
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sa.Column('source_code', sa.VARCHAR(length=50), autoincrement=False, nullable=False),
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sa.Column('status', sa.VARCHAR(length=20), autoincrement=False, nullable=False),
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sa.Column('total_count', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
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sa.Column('new_count', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
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sa.Column('error_message', sa.TEXT(), autoincrement=False, nullable=True),
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sa.Column('crawled_at', postgresql.TIMESTAMP(), server_default=sa.text('CURRENT_TIMESTAMP'), autoincrement=False, nullable=True),
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sa.Column('duration', sa.DOUBLE_PRECISION(precision=53), server_default=sa.text('0.0'), autoincrement=False, nullable=True),
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sa.ForeignKeyConstraint(['source_code'], ['announcement_sources.code'], name=op.f('crawl_results_source_code_fkey')),
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sa.PrimaryKeyConstraint('id', name=op.f('crawl_results_pkey'))
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)
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op.create_index(op.f('idx_crawl_results_crawled_at'), 'crawl_results', [sa.literal_column('crawled_at DESC')], unique=False)
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# ### end Alembic commands ###
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