Update app.py

app.py

@@ -842,22 +842,45 @@ SELECT
         return self._finalize_sql(fixed_sql, status)
 
     def _generate_fallback_sql(self, prompt: str) -> str:
-        """當模型不可用時的備用 SQL 生成"""
-        prompt_lower = prompt.lower()
-
-        if "統計" in prompt or "數量" in prompt or "多少" in prompt:
-            if "月" in prompt:
-                return "SELECT strftime('%Y-%m', completed_time) as month, COUNT(*) as count FROM jobtimeline GROUP BY month ORDER BY month;"
-            elif "客戶" in prompt:
-                return "SELECT applicant, COUNT(*) as count FROM tsr53sampledescription GROUP BY applicant ORDER BY count DESC;"
-            else:
-                return "SELECT COUNT(*) as total_count FROM jobtimeline WHERE completed_time IS NOT NULL;"
-        elif "金額" in prompt or "總額" in prompt:
-            return "SELECT SUM(amount) as total_amount FROM tsr53invoice;"
-        elif "評級" in prompt or "pass" in prompt_lower or "fail" in prompt_lower:
-            return "SELECT rating, COUNT(*) as count FROM tsr53sampledescription GROUP BY rating;"
-        else:
-            return "SELECT * FROM jobtimeline LIMIT 10;"
+            """當模型不可用時的備用 SQL 生成"""
+            prompt_lower = (prompt or "").lower()
+            # 統計類：優先使用 JobTimeline.ReportAuthorization，避免不存在的 completed_time 欄位
+            if ("統計" in prompt) or ("數量" in prompt) or ("多少" in prompt) or ("count" in prompt_lower):
+                if ("月" in prompt) or ("per month" in prompt_lower) or ("monthly" in prompt_lower):
+                    return (
+                        "SELECT strftime('%Y-%m', jt.ReportAuthorization) AS month, "
+                        "COUNT(DISTINCT jt.JobNo) AS count "
+                        "FROM JobTimeline AS jt "
+                        "WHERE jt.ReportAuthorization IS NOT NULL "
+                        "GROUP BY month ORDER BY month;"
+                    )
+                elif ("客戶" in prompt) or ("buyer" in prompt_lower) or ("applicant" in prompt_lower):
+                    return (
+                        "SELECT sd.ApplicantName AS applicant, COUNT(DISTINCT jt.JobNo) AS count "
+                        "FROM JobTimeline AS jt "
+                        "JOIN TSR53SampleDescription AS sd ON jt.JobNo = sd.JobNo "
+                        "WHERE jt.ReportAuthorization IS NOT NULL "
+                        "GROUP BY sd.ApplicantName ORDER BY count DESC;"
+                    )
+                else:
+                    return (
+                        "SELECT COUNT(DISTINCT jt.JobNo) AS total_count "
+                        "FROM JobTimeline AS jt "
+                        "WHERE jt.ReportAuthorization IS NOT NULL;"
+                    )
+            # 金額彙總
+            if ("金額" in prompt) or ("總額" in prompt) or ("amount" in prompt_lower) or ("sum" in prompt_lower):
+                return "SELECT SUM(LocalAmount) AS total_amount FROM TSR53Invoice;"
+            # 評級分布
+            if ("評級" in prompt) or ("rating" in prompt_lower) or ("pass" in prompt_lower) or ("fail" in prompt_lower):
+                return "SELECT OverallRating AS rating, COUNT(*) AS count FROM TSR53SampleDescription GROUP BY OverallRating;"
+            # 通用後備：最近 10 筆報告
+            return (
+                "SELECT jt.JobNo, jt.ReportAuthorization "
+                "FROM JobTimeline AS jt "
+                "WHERE jt.ReportAuthorization IS NOT NULL "
+                "ORDER BY jt.ReportAuthorization DESC LIMIT 10;"
+            )
 
     def process_question(self, question: str) -> Tuple[str, str]:
         """處理使用者問題"""