140 lines
7.7 KiB
Python
140 lines
7.7 KiB
Python
from datetime import datetime
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from sqlalchemy import CheckConstraint, DateTime, Float, ForeignKey, Index, Integer, String, Text, text
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from sqlalchemy.orm import Mapped, mapped_column
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from app.models.base import Base, TimestampMixin, SoftDeleteMixin
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class ChatGenerationTask(Base, TimestampMixin, SoftDeleteMixin):
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"""Project-independent AI chat/image/video generation task.
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This table is intentionally NOT linked to projects. It is used by the
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/generation-ai Celery pipeline so chat-style generation does not touch the
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legacy generation_records -> projects foreign-key chain.
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"""
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__tablename__ = "chat_generation_tasks"
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__table_args__ = (
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# 防止前端按钮连点/网络重试时同一个 idempotency_key 并发创建多条任务。
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# nullable unique 兼容不传 idempotency_key 的普通请求。
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Index(
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"uq_chat_generation_tasks_user_mode_idempotency",
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"user_id",
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"generation_mode",
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"idempotency_key",
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unique=True,
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postgresql_where=text("deleted_at IS NULL AND idempotency_key IS NOT NULL"),
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),
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# AI 创作顶层任务在 chatapi_async/chatapi_main 之间切换时，
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# 同一个前端幂等键也只能创建一组任务。
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Index(
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"uq_chat_generation_tasks_user_chat_idempotency",
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"user_id",
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"idempotency_key",
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unique=True,
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postgresql_where=text(
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"deleted_at IS NULL "
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"AND idempotency_key IS NOT NULL "
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"AND generation_mode IN ('chatapi_async', 'chatapi_main')"
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),
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),
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# 视频 24 小时降频轮询调度使用。
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Index(
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"idx_chat_generation_tasks_next_poll_at",
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"next_poll_at",
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postgresql_where=text(
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"deleted_at IS NULL "
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"AND status = 'generating' "
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"AND gen_type = 'video' "
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"AND next_poll_at IS NOT NULL"
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),
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),
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Index(
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"uq_chat_generation_tasks_parent_index",
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"parent_task_id",
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"generation_index",
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unique=True,
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postgresql_where=text("parent_task_id IS NOT NULL AND generation_index IS NOT NULL"),
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),
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Index("idx_chat_generation_tasks_parent", "parent_task_id"),
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Index("idx_chat_generation_tasks_user_mode_created", "user_id", "generation_mode", "created_at"),
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CheckConstraint("generation_count BETWEEN 1 AND 5", name="ck_chat_generation_tasks_generation_count"),
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CheckConstraint("generation_index IS NULL OR generation_index > 0", name="ck_chat_generation_tasks_generation_index"),
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)
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id: Mapped[str] = mapped_column(String(32), primary_key=True)
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user_id: Mapped[str] = mapped_column(
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String(32), ForeignKey("users.id", ondelete="CASCADE"), index=True, nullable=False
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)
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original_prompt: Mapped[str] = mapped_column(Text, nullable=False)
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optimized_prompt: Mapped[str | None] = mapped_column(Text, nullable=True)
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gen_type: Mapped[str] = mapped_column(String(16), default="video", index=True)
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duration: Mapped[int | None] = mapped_column(Integer, nullable=True)
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aspect_ratio: Mapped[str | None] = mapped_column(String(8), nullable=True)
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resolution: Mapped[str | None] = mapped_column(String(8), nullable=True)
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image_size: Mapped[str | None] = mapped_column(String(16), nullable=True)
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image_proportion: Mapped[str | None] = mapped_column(String(8), nullable=True)
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image_px: Mapped[str | None] = mapped_column(String(16), nullable=True)
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status: Mapped[str] = mapped_column(String(32), default="generating", index=True)
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pipeline_stage: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
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generation_mode: Mapped[str] = mapped_column(String(32), default="chatapi_async", index=True)
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parent_task_id: Mapped[str | None] = mapped_column(
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String(32), ForeignKey("chat_generation_tasks.id", ondelete="RESTRICT"), nullable=True
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)
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generation_count: Mapped[int] = mapped_column(Integer, default=1, server_default="1", nullable=False)
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generation_index: Mapped[int | None] = mapped_column(Integer, nullable=True)
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# 图片主任务同步调用供应商时的分布式执行租约。
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# 防止重复 Celery 消息或恢复任务同时触发多次组图请求。
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provider_create_claim_token: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
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provider_create_lease_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
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provider_create_started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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media_references: Mapped[str | None] = mapped_column(Text, nullable=True)
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provider_task_id: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
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# Kept as alias-compatible storage for existing frontend/service naming.
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seedance_task_id: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
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remote_result_url: Mapped[str | None] = mapped_column(Text, nullable=True)
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image_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
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video_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
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video_cover_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
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engine_id: Mapped[str | None] = mapped_column(String(32), nullable=True, index=True)
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engine_snapshot_json: Mapped[str | None] = mapped_column(Text, nullable=True)
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provider_response_json: Mapped[str | None] = mapped_column(Text, nullable=True)
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credits_cost: Mapped[float] = mapped_column(Float, default=0.0)
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text_credits_cost: Mapped[float] = mapped_column(Float, default=0.0)
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text_tokens_used: Mapped[int] = mapped_column(Integer, default=0)
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video_tokens_used: Mapped[int] = mapped_column(Integer, default=0)
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image_tokens_used: Mapped[int] = mapped_column(Integer, default=0)
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retry_count: Mapped[int] = mapped_column(Integer, default=0)
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poll_count: Mapped[int] = mapped_column(Integer, default=0)
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last_poll_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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# 视频降频轮询调度字段。
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# 图片同步生成仍沿用原超时逻辑；这些字段主要给 video + provider poll 使用。
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poll_started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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next_poll_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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poll_interval_seconds: Mapped[int] = mapped_column(Integer, default=0)
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deadline_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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generated_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
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idempotency_key: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
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# Celery 下载容灾字段。
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download_celery_task_id: Mapped[str | None] = mapped_column(String(160), nullable=True, index=True)
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download_enqueued_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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download_started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
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download_lease_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
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download_next_retry_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
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download_attempt_count: Mapped[int] = mapped_column(Integer, default=0)
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download_last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
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download_storage_date_dir: Mapped[str | None] = mapped_column(String(16), nullable=True)
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