fix(ai): 自動偵測挑品銷售欄位

CONSTITUTION.md

@@ -2,7 +2,7 @@
 
 > 本文件定義專案開發的核心準則與不可違反的規範
 > **建立日期**: 2026-01-12
-> **當前版本**: V10.46 (Fix product pick sales date casting)
+> **當前版本**: V10.47 (Auto-detect sales columns for product picks)
 > **最後更新**: 2026-05-01
 
 ---

app.py

@@ -95,8 +95,8 @@ except Exception as e:
     sys_log.error(f"無法檢測磁碟空間: {e}")
 
 # 🚩 系統版本定義 (備份與顯示用)
-# 🚩 2026-05-01 V10.46: Fix product pick sales date casting
-SYSTEM_VERSION = "V10.46"
+# 🚩 2026-05-01 V10.47: Auto-detect sales columns for product picks
+SYSTEM_VERSION = "V10.47"
 
 # ==========================================
 # 🔒 SQL Injection 防護函數

services/ai_product_pick_agent.py

@@ -66,27 +66,68 @@ def _has_daily_sales_snapshot(conn) -> bool:
         return False
 
 
+def _daily_sales_columns(conn) -> Dict[str, str]:
+    """依正式匯入表實際欄位挑選可用欄名。"""
+    from sqlalchemy import text
+
+    rows = conn.execute(text("""
+        SELECT column_name
+        FROM information_schema.columns
+        WHERE table_name = 'daily_sales_snapshot'
+    """)).fetchall()
+    columns = {row[0] for row in rows}
+
+    def first_available(candidates):
+        return next((col for col in candidates if col in columns), None)
+
+    return {
+        "sku": first_available(["商品ID", "Product ID", "ID", "i_code", "Item Code"]),
+        "date": first_available(["snapshot_date", "日期", "訂單日期", "交易日期", "Date"]),
+        "revenue": first_available(["總業績", "銷售金額", "業績", "金額", "Amount", "Sales", "Total"]),
+        "qty": first_available(["數量", "銷售數量", "銷量", "Qty", "Quantity"]),
+    }
+
+
+def _quote_identifier(identifier: str) -> str:
+    return '"' + identifier.replace('"', '""') + '"'
+
+
 def _fetch_candidates(conn, limit: int) -> List[Dict[str, Any]]:
     from sqlalchemy import text
 
     sales_join = ""
     sales_select = "0 AS sales_7d, 0 AS sales_prev_7d, 0 AS qty_7d"
+    sales_cols = {}
     if _has_daily_sales_snapshot(conn):
+        sales_cols = _daily_sales_columns(conn)
+        if not all([sales_cols.get("sku"), sales_cols.get("date"), sales_cols.get("revenue"), sales_cols.get("qty")]):
+            sales_cols = {}
+
+    if sales_cols:
+        sku_col = _quote_identifier(sales_cols["sku"])
+        date_col = _quote_identifier(sales_cols["date"])
+        revenue_col = _quote_identifier(sales_cols["revenue"])
+        qty_col = _quote_identifier(sales_cols["qty"])
         sales_join = """
             LEFT JOIN (
                 SELECT
-                    "商品ID" AS sku,
-                    SUM(CASE WHEN snapshot_date::date >= CURRENT_DATE - 7
-                             THEN COALESCE("銷售金額"::numeric, 0) ELSE 0 END) AS sales_7d,
-                    SUM(CASE WHEN snapshot_date::date >= CURRENT_DATE - 14
-                              AND snapshot_date::date < CURRENT_DATE - 7
-                             THEN COALESCE("銷售金額"::numeric, 0) ELSE 0 END) AS sales_prev_7d,
-                    SUM(CASE WHEN snapshot_date::date >= CURRENT_DATE - 7
-                             THEN COALESCE("數量"::numeric, 0) ELSE 0 END) AS qty_7d
+                    {sku_col} AS sku,
+                    SUM(CASE WHEN {date_col}::date >= CURRENT_DATE - 7
+                             THEN COALESCE({revenue_col}::numeric, 0) ELSE 0 END) AS sales_7d,
+                    SUM(CASE WHEN {date_col}::date >= CURRENT_DATE - 14
+                              AND {date_col}::date < CURRENT_DATE - 7
+                             THEN COALESCE({revenue_col}::numeric, 0) ELSE 0 END) AS sales_prev_7d,
+                    SUM(CASE WHEN {date_col}::date >= CURRENT_DATE - 7
+                             THEN COALESCE({qty_col}::numeric, 0) ELSE 0 END) AS qty_7d
                 FROM daily_sales_snapshot
-                GROUP BY "商品ID"
+                GROUP BY {sku_col}
             ) sales ON sales.sku = lm.sku
-        """
+        """.format(
+            sku_col=sku_col,
+            date_col=date_col,
+            revenue_col=revenue_col,
+            qty_col=qty_col,
+        )
         sales_select = """
             COALESCE(sales.sales_7d, 0) AS sales_7d,
             COALESCE(sales.sales_prev_7d, 0) AS sales_prev_7d,

tests/test_frontend_v2_assets.py

@@ -148,7 +148,9 @@ def test_ai_product_pick_agent_uses_real_competitor_data_and_dashboard_action():
     assert "'product_pick'" in agent_source
     assert "PChomeProductPickAgent" in agent_source
     assert "PChome 價格優勢" in agent_source
-    assert "snapshot_date::date" in agent_source
+    assert "_daily_sales_columns" in agent_source
+    assert '"總業績"' in agent_source
+    assert "{date_col}::date" in agent_source
     assert "conn.rollback()" in agent_source
 
     assert "@ai_bp.route('/api/ai/product-picks/generate', methods=['POST'])" in route_source