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utopia/migrations/0008_conversations.sql at main · deeplethe/utopia · GitHub
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0008_conversations.sql
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--
Chat 会话持久化——对话、消息、行动轨迹与引用随消息落库。
--
上下文由服务端从这里拼装(前端只传 conversation_id + 新消息);
--
steps/sources 与实时 SSE 事件同构,历史回放与流式渲染共用一套组件。
CREATE
TABLE
conversations
(
id UUID
PRIMARY KEY
,
kb_id UUID
NOT NULL
REFERENCES
knowledge_bases(id)
ON DELETE CASCADE
,
user_id UUID
NOT NULL
REFERENCES
users(id)
ON DELETE CASCADE
,
title
TEXT
NOT NULL
DEFAULT
'
'
,
created_at
TIMESTAMPTZ
NOT NULL
DEFAULT now(),
updated_at
TIMESTAMPTZ
NOT NULL
DEFAULT now()
);
CREATE
INDEX
conversations_kb_user_idx
ON
conversations (kb_id, user_id, updated_at
DESC
);
CREATE
TABLE
conversation_messages
(
id UUID
PRIMARY KEY
,
conversation_id UUID
NOT NULL
REFERENCES
conversations(id)
ON DELETE CASCADE
,
role
TEXT
NOT NULL
CHECK
(role
IN
(
'
user
'
,
'
assistant
'
)),
content
TEXT
NOT NULL
,
--
行动轨迹(工具调用步骤)与引用清单(历史回放;与 SSE step/sources 同构)
steps JSONB
NOT NULL
DEFAULT
'
[]
'
,
sources JSONB
NOT NULL
DEFAULT
'
[]
'
,
--
这一轮认下了哪些实体(id、名字、类型),下一轮回放它。
--
**不回放整段工具结果**:那里面是 chunk 正文,每轮重复堆进上下文,几轮就
--
把窗口吃光。要回放的是身份——有了 id,下一轮直接调 entity_facts,不必从
--
名字重查;顺带治掉一个更隐蔽的毛病:同名歧义时两轮可能查到不同的实体,
--
于是前后两个答案讲的不是同一个节点
resolved JSONB
NOT NULL
DEFAULT
'
[]
'
::jsonb,
created_at
TIMESTAMPTZ
NOT NULL
DEFAULT now()
);
CREATE
INDEX
conversation_messages_conv_idx
ON
conversation_messages (conversation_id, created_at);
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