{"record":{"id":"b4ddc99fcaef604c","repo":"datawhalechina/hello-agents","slug":"error-b4ddc9","errorCode":null,"errorMessage":"获取提示失败","messagePattern":"获取提示失败","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"Co-creation-projects/afei-GuessWhoAmI/frontend/app.js","lineNumber":159,"sourceCode":"    if (this.remainingHints <= 0) {\n      alert('提示次数已用完');\n      return;\n    }\n\n    this.setControlsDisabled(true);\n\n    try {\n      const response = await fetch('http://localhost:8000/api/game/hint', {\n        method: 'POST',\n        headers: {'Content-Type': 'application/json'},\n        body: JSON.stringify({session_id: this.sessionId})\n      });\n\n      if (!response.ok) throw new Error(`HTTP error: ${response.status}`);\n\n      const result = await response.json();\n\n      if (!result.success) throw new Error(result.error || '获取提示失败');\n\n      const data = result.data;\n      const hintText = data.hint || data.message || '暂无提示';\n      this.addMessage(`💡 提示：${hintText}`, 'agent');\n\n      this.remainingHints = data.remaining_hints !== undefined ?\n          data.remaining_hints :\n          this.remainingHints - 1;\n      this.updateStats();\n\n    } catch (error) {\n      alert(`获取提示失败：${error.message}`);\n      console.error('Hint error:', error);\n    } finally {\n      this.setControlsDisabled(false);\n    }\n  }\n","sourceCodeStart":141,"sourceCodeEnd":177,"githubUrl":"https://github.com/datawhalechina/hello-agents/blob/606a07d341a47be773fab7f4b71177f53f96b2c3/Co-creation-projects/afei-GuessWhoAmI/frontend/app.js#L141-L177","documentation":"Application guard for the hint call: 2xx + parsed JSON but result.success falsy; throws result.error or the '获取提示失败' fallback. Business-level rejection — typically no hints remaining or invalid session — rendered via alert('获取提示失败：'+message).","triggerScenarios":"Backend returns success:false when remaining_hints is 0, session unknown, or game over, and omits error. The client-side remainingHints counter can also drift from the server, so the user requests a hint the server already denies.","commonSituations":"Hint counter desync (client thinks hints remain, server says none); backend hint logic erroring but wrapped in success:false without error text.","solutions":["Have the backend return a specific error code (e.g. NO_HINTS_LEFT) and show a friendly message instead of a generic alert","Sync remaining_hints from the server on every chat/hint response (the code partially does this — ensure it also updates on denial)","Log result to find the omitted reason; fix backend to always populate error","Replace alert() with inline UI feedback"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"if (this.remainingHints <= 0) { addMessage('没有剩余提示了', 'system'); return; }","typeGuard":null,"tryCatchPattern":"try { ... } catch (e) { alert(`获取提示失败：${e.message}`); }","preventionTips":["Trust server-side remaining_hints over client count","Return machine-readable error codes from the backend","Replace alert with inline non-blocking UI"],"tags":["api-envelope","hint","game","state-sync"],"backgroundTag":null,"analyzedSha":"606a07d341a47be773fab7f4b71177f53f96b2c3","analyzedAt":"2026-08-14T22:57:27.446Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}