{"record":{"id":"f38bbd1dfd8b4d12","repo":"Crosstalk-Solutions/project-nomad","slug":"failed-to-update-chat-session","errorCode":null,"errorMessage":"Failed to update chat session","messagePattern":"Failed to update chat session","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"admin/app/services/chat_service.ts","lineNumber":182,"sourceCode":"      if (data.model !== undefined) {\n        session.model = data.model\n      }\n\n      await session.save()\n\n      return {\n        id: session.id.toString(),\n        title: session.title,\n        model: session.model,\n        timestamp: session.updated_at.toJSDate(),\n      }\n    } catch (error) {\n      logger.error(\n        `[ChatService] Failed to update session ${sessionId}: ${\n          error instanceof Error ? error.message : error\n        }`\n      )\n      throw new Error('Failed to update chat session')\n    }\n  }\n\n  async addMessage(sessionId: number, role: 'system' | 'user' | 'assistant', content: string) {\n    try {\n      const message = await ChatMessage.create({\n        session_id: sessionId,\n        role,\n        content,\n      })\n\n      // Update session's updated_at timestamp\n      const session = await ChatSession.findOrFail(sessionId)\n      session.updated_at = DateTime.now()\n      await session.save()\n\n      return {\n        id: message.id.toString(),","sourceCodeStart":164,"sourceCodeEnd":200,"githubUrl":"https://github.com/Crosstalk-Solutions/project-nomad/blob/0bd1c6f4f9888d577fe232de06ac144bb8337131/admin/app/services/chat_service.ts#L164-L200","documentation":"ChatService.updateSession rethrows this after logging when either ChatSession.findOrFail(sessionId) rejects (session not found) or the subsequent session.save() fails (DB error). findOrFail's ModelNotFoundException surfaces here as this generic message.","triggerScenarios":"Calling updateSession with a sessionId that was already deleted, calling it after generateTitle with a stale id, or a DB failure during save() (connection dropped, constraint on the title/model column).","commonSituations":"Race where the user deletes a session in another tab while an LLM title-generation flow tries to update it, concurrent requests with stale session ids, or transient DB disconnects during long chat operations.","solutions":["Confirm the session id still exists (SELECT on chat_sessions) before retrying","Check logs for '[ChatService] Failed to update session <id>: <cause>' to distinguish not-found from DB failure","If it's a delete/update race, treat not-found as idempotent success instead of an error","Fix DB connectivity if save() is the failing step","Pass { cause: error } through for diagnosability"],"exampleFix":"// before\n} catch (error) {\n  throw new Error('Failed to update session')\n}\n\n// after\nimport { Exception } from '@adonisjs/core/exceptions'\ntry {\n  // ...\n} catch (error) {\n  if (error.code === 'E_ROW_NOT_FOUND') return false // deleted concurrently — treat as no-op\n  throw new Error('Failed to update session', { cause: error })\n}","handlingStrategy":"try-catch","validationCode":"const exists = await ChatSession.find(sessionId)\nif (!exists) return handleSessionGone() // avoid E_ROW_NOT_FOUND path","typeGuard":"async function sessionExists(id: number): Promise<boolean> {\n  return (await ChatSession.find(id)) !== null\n}","tryCatchPattern":"try { await chat.updateSession(id, patch) } catch (e) { if (e.message === 'Failed to update chat session') { refreshSessionList(); return } throw e }","preventionTips":["Check session existence before update in UI flows with stale data","Make title-generation updates tolerant of deleted sessions (idempotent no-op)","Distinguish E_ROW_NOT_FOUND from DB errors in the service layer","Propagate cause for diagnosability"],"tags":["chat","database","adonisjs","update","not-found"],"backgroundTag":"record-not-found","analyzedSha":"0bd1c6f4f9888d577fe232de06ac144bb8337131","analyzedAt":"2026-08-27T05:34:15.424Z","schemaVersion":2},"datasetVersion":"2026-08-27T08:17:20.692Z"}