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The _column_exists() helper in migrations 026-029 calls conn.execute() which returns None in Alembic's offline/SQL mode (--sql flag), causing AttributeError on result.scalar(). Add context.is_offline_mode() guard to skip the idempotency check in offline mode and unconditionally emit the DDL statements. Fixes: Validate CI step 'alembic upgrade head --sql' failure.
57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
"""Add user profile fields (name, avatar, updated_at)
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Revision ID: 026
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Revises: 025
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Create Date: 2026-07-05
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补录用户资料字段。生产数据库已手动添加过这些字段，
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因此 upgrade 做幂等检查，避免在已有字段的库上执行报错。
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"""
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import sqlalchemy as sa
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from alembic import context, op
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revision = "026"
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down_revision = "025"
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branch_labels = None
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depends_on = None
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def _column_exists(table: str, column: str) -> bool:
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if context.is_offline_mode():
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return False
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conn = op.get_bind()
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result = conn.execute(
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sa.text(
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"SELECT COUNT(*) FROM information_schema.columns " "WHERE table_name = :table AND column_name = :column"
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),
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{"table": table, "column": column},
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)
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return result.scalar() > 0
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def upgrade() -> None:
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if not _column_exists("users", "name"):
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op.add_column("users", sa.Column("name", sa.String(100), nullable=True))
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if not _column_exists("users", "avatar"):
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op.add_column("users", sa.Column("avatar", sa.String(500), nullable=True))
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if not _column_exists("users", "updated_at"):
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op.add_column(
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"users",
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sa.Column(
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"updated_at",
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sa.DateTime(),
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nullable=True,
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server_default=sa.func.now(),
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),
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)
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def downgrade() -> None:
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op.drop_column("users", "updated_at")
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op.drop_column("users", "avatar")
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op.drop_column("users", "name")
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