7f57f96c25
本次 squash merge 将 codex-story-first-image-intent 的整体改动合入 development，核心内容包括： 1. 后端数据与迁移：新增 stories、story_versions、story_image_intents、chapter_cover_intents、assets 等模型与 Alembic 迁移，建立 story-first、markdown-first、asset-first 的主数据链路。 2. 生成与任务链：引入 StoryBuilderOrchestrator、ChapterComposerOrchestrator、story_image_tasks、chapter_cover_tasks，图片生成从正文占位符改为结构化 intent -> asset -> markdown 回填。 3. 并发与一致性：为 story/chapter intent 增加 claim_token、claimed_at、attempt_count，采用数据库原子 claim 为主、Redis 锁为辅，避免重复生成、锁误删和 processing 卡死。 4. Memoir 读写路径：章节 canonical_markdown 成为正文真源，列表/详情接口补齐 markdown、cover_asset、word_count 等字段，PDF 与 asset 解析链路同步升级。 5. Memory / Retrieval：扩展 transcript ingest、chunking、evidence 检索与 story 聚合基础设施，为后续 story-first RAG 与多 agent 编排提供底座。 6. App 端体验：章节页继续走 MarkdownRenderer 阅读链，同时吸收 fix3-19 的跨平台 UI glitch 修复；更新对话页、首页、文案资源与章节列表映射逻辑。 7. 测试与文档：补充 asset resolver、story image task、章节封面派发、markdown 映射等回归测试，并加入图片占位符退役设计文档。
73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
"""story_image_intents: one primary per story + optional FK to assets
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Revision ID: 0009_si_constraints
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Revises: 0008_legacy_assets
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = "0009_si_constraints"
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down_revision: Union[str, Sequence[str], None] = "0008_legacy_assets"
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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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bind = op.get_bind()
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bind.execute(
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sa.text(
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"""
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UPDATE story_image_intents SET asset_id = NULL
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WHERE asset_id IS NOT NULL
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AND NOT EXISTS (SELECT 1 FROM assets a WHERE a.id = story_image_intents.asset_id)
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"""
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)
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)
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# 去重：同一 story 多条 primary 时保留最新一条
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bind.execute(
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sa.text(
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"""
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DELETE FROM story_image_intents
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WHERE id IN (
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SELECT id FROM (
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SELECT id,
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ROW_NUMBER() OVER (
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PARTITION BY story_id
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ORDER BY created_at DESC NULLS LAST, id DESC
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) AS rn
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FROM story_image_intents
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WHERE intent_role = 'primary'
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) t
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WHERE rn > 1
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)
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"""
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)
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)
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op.create_foreign_key(
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"fk_story_image_intents_asset_id_assets",
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"story_image_intents",
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"assets",
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["asset_id"],
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["id"],
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ondelete="SET NULL",
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)
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op.execute(
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"""
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CREATE UNIQUE INDEX IF NOT EXISTS uq_story_primary_image_intent
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ON story_image_intents (story_id)
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WHERE intent_role = 'primary'
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"""
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)
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def downgrade() -> None:
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op.execute("DROP INDEX IF EXISTS uq_story_primary_image_intent")
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op.drop_constraint(
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"fk_story_image_intents_asset_id_assets",
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"story_image_intents",
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type_="foreignkey",
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)
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