84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
"""生成任务（图片/视频/等）通用任务表。
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设计目标：
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- 统一支撑“流式输出”“任务 + 轮询”等多种交付方式
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- 进度使用 0-100 的整数，前端轮询时可直接展示
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- payload/result 采用 JSON，便于不同模型/供应商扩展
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"""
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from __future__ import annotations
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from enum import Enum
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from typing import Any
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from sqlalchemy import JSON, Index, Integer, String, Text
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from sqlalchemy.orm import Mapped, mapped_column
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from app.core.db import Base
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from app.models.base import TimestampMixin
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class GenerationTaskStatus(str, Enum):
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pending = "pending"
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running = "running"
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streaming = "streaming"
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succeeded = "succeeded"
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failed = "failed"
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cancelled = "cancelled"
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class GenerationDeliveryMode(str, Enum):
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streaming = "streaming" # 长连接分段输出（SSE/WebSocket/HTTP chunked）
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async_polling = "async_polling" # 任务 + 轮询查询状态
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class GenerationTask(Base, TimestampMixin):
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__tablename__ = "generation_tasks"
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id: Mapped[str] = mapped_column(String(64), primary_key=True, comment="任务 ID")
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mode: Mapped[GenerationDeliveryMode] = mapped_column(
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String(32),
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nullable=False,
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index=True,
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comment="交付方式：streaming / async_polling / ...",
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)
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status: Mapped[GenerationTaskStatus] = mapped_column(
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String(32),
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nullable=False,
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default=GenerationTaskStatus.pending,
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index=True,
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comment="任务状态",
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)
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progress: Mapped[int] = mapped_column(
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Integer,
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nullable=False,
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default=0,
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comment="进度 0-100",
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)
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payload: Mapped[dict[str, Any]] = mapped_column(
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JSON,
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nullable=False,
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default=dict,
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comment="请求参数（JSON）",
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)
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result: Mapped[dict[str, Any] | None] = mapped_column(
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JSON,
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nullable=True,
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comment="结果（JSON，例如 url、metadata）",
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)
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error: Mapped[str] = mapped_column(
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Text,
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nullable=False,
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default="",
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comment="失败原因（为空表示无错误）",
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)
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__table_args__ = (
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# 轮询高频：按 id 主键读最常见；列表/后台清理可按状态与更新时间过滤
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Index("ix_generation_tasks_status_updated_at", "status", "updated_at"),
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Index("ix_generation_tasks_mode_updated_at", "mode", "updated_at"),
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)
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