支持供应商简称维护和订单PDF下载命名

po_app/models.py

@@ -81,6 +81,7 @@ class Supplier(Base):
     id = Column(Integer, primary_key=True)
     code = Column(String(50))
     name = Column(String(200), nullable=False)
+    short_name = Column(String(60), nullable=False, default='')
     contact = Column(String(50))
     phone = Column(String(50))
     tax_no = Column(String(80))
@@ -277,5 +278,5 @@ def init_db(db_path):
     Base.metadata.create_all(engine)
     if not existed:
         with engine.connect() as con:
-            con.exec_driver_sql('PRAGMA user_version=4')
+            con.exec_driver_sql('PRAGMA user_version=5')
     return engine, sessionmaker(bind=engine)