Your AI SDK chat table breaks every six months
Open lib/db/schema.ts in Vercel's ai-chatbot template and look at line 42: export const message = pgTable ( " Message_v2 " , { The _v2 is a scar. When ai 5 changed the message shape, migrating the existing table in place was harder than adding a new one beside it, so the template added Message_v2 and Vote_v2 , backfilled, and eventually deleted the originals. The old tables are gone now. The…
The AI SDK chat table breaks every six months. In the open lib/db/schema.ts of Vercel's ai-chatbot template, the Message_v2 table was introduced when the message shape changed during an update. However, migrating the existing table in place proved challenging, leading to the addition of Message_v2 and Vote_v2 tables, with the originals eventually being deleted. The old tables now carry their version numbers permanently in the schema for every new project that forks from the template.
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