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fix(copilot): make user-message persistence idempotent on message_id #4811

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fix(copilot): make user-message persistence idempotent on message_id #4811

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11 changes: 10 additions & 1 deletion apps/sim/lib/copilot/chat/post.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -326,10 +326,19 @@ async function persistUserMessage(params: {
contexts,
})

// Append the user message idempotently: only concatenate when the array
// doesn't already contain a message with this id. A repeated id here is
// always a retry/double-submit of the same message (the client mints a
// fresh id per distinct send), so skipping the append avoids duplicate
// entries while keeping the stream marker / updatedAt current.
const [updated] = await db
.update(copilotChats)
.set({
messages: sql`${copilotChats.messages} || ${JSON.stringify([userMsg])}::jsonb`,
messages: sql`CASE
WHEN ${copilotChats.messages} @> ${JSON.stringify([{ id: userMessageId }])}::jsonb
THEN ${copilotChats.messages}
ELSE ${copilotChats.messages} || ${JSON.stringify([userMsg])}::jsonb
END`,
conversationId: userMessageId,
updatedAt: new Date(),
})
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