支持供应商简称维护和订单PDF下载命名

po_app/excel_io.py

@@ -66,7 +66,7 @@ def read_rows(path):
     return out
 
 
-def read_table(path, keys, order):
+def read_table(path, keys, order, missing=""):
     """通用表格读取：按关键词映射表头，返回按 order 排列的二维列表。
 
     与 read_rows() 的区别是表头判定更宽松（命中任意关键词即可），
@@ -110,7 +110,7 @@ def read_table(path, keys, order):
         vals = []
         for k in order:
             i = mapping.get(k)
-            vals.append(row[i] if (i is not None and i < len(row)) else "")
+            vals.append(row[i] if (i is not None and i < len(row)) else missing)
         out.append(vals)
     return out
 
@@ -124,6 +124,7 @@ MATERIAL_KEYS = {
 MATERIAL_ORDER = ["code", "spec", "unit", "price"]
 
 SUPPLIER_KEYS = {
+    "short_name": [u"简称", u"别名"],
     "code": [u"编号", u"供应商编号", u"代码"],
     "name": [u"名称", u"供应商名称", u"公司"],
     "contact": [u"联系人"],
@@ -134,7 +135,7 @@ SUPPLIER_KEYS = {
     "bank_account": [u"银行帐号", u"银行账号", u"帐号", u"账号"],
 }
 SUPPLIER_ORDER = ["code", "name", "contact", "phone", "payment_terms",
-                  "tax_no", "bank_name", "bank_account"]
+                  "tax_no", "bank_name", "bank_account", "short_name"]
 
 
 def read_material_rows(path):
@@ -143,5 +144,5 @@ def read_material_rows(path):
 
 
 def read_supplier_rows(path):
-    """读取供应商表，返回 [编号,名称,联系人,电话,付款方式,税号,开户银行,银行帐号]。"""
-    return read_table(path, SUPPLIER_KEYS, SUPPLIER_ORDER)
+    """简称追加在末列；旧表缺少该列时以 None 表示，更新时保留已有简称。"""
+    return read_table(path, SUPPLIER_KEYS, SUPPLIER_ORDER, missing=None)