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74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
"""2.2.10
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新增 Agent 会话历史表
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Revision ID: 8ab72c49d1e3
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Revises: 7c1a2b3d4e5f
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Create Date: 2026-06-18
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"""
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from alembic import op
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import sqlalchemy as sa
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revision = "8ab72c49d1e3"
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down_revision = "7c1a2b3d4e5f"
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branch_labels = None
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depends_on = None
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def _has_table(inspector: sa.Inspector, table_name: str) -> bool:
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"""检查数据表是否已存在。"""
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return table_name in inspector.get_table_names()
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def upgrade() -> None:
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"""升级数据库结构。"""
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inspector = sa.inspect(op.get_bind())
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if _has_table(inspector, "agentchat"):
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return
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op.create_table(
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"agentchat",
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sa.Column("id", sa.Integer(), nullable=False),
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sa.Column("session_id", sa.String(), nullable=False),
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sa.Column("client_session_id", sa.String(), nullable=True),
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sa.Column("user_id", sa.String(), nullable=True),
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sa.Column("username", sa.String(), nullable=True),
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sa.Column("channel", sa.String(), nullable=True),
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sa.Column("source", sa.String(), nullable=True),
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sa.Column("original_chat_id", sa.String(), nullable=True),
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sa.Column("title", sa.String(), nullable=True),
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sa.Column("preview", sa.String(), nullable=True),
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sa.Column("agent_messages", sa.JSON(), nullable=True),
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sa.Column("display_messages", sa.JSON(), nullable=True),
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sa.Column("message_count", sa.Integer(), nullable=True),
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sa.Column("created_at", sa.String(), nullable=True),
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sa.Column("updated_at", sa.String(), nullable=True),
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sa.PrimaryKeyConstraint("id"),
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)
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op.create_index(
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"ix_agentchat_session_user",
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"agentchat",
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["session_id", "user_id"],
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)
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op.create_index(
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"ix_agentchat_user_updated",
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"agentchat",
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["user_id", "updated_at", "id"],
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)
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op.create_index(
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"ix_agentchat_channel_updated",
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"agentchat",
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["channel", "updated_at", "id"],
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)
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def downgrade() -> None:
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"""回滚数据库结构。"""
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inspector = sa.inspect(op.get_bind())
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if not _has_table(inspector, "agentchat"):
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return
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op.drop_index("ix_agentchat_channel_updated", table_name="agentchat")
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op.drop_index("ix_agentchat_user_updated", table_name="agentchat")
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op.drop_index("ix_agentchat_session_user", table_name="agentchat")
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op.drop_table("agentchat")
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