Turbogears2 AdminController拋出一個多對多關係的錯誤

當我嘗試編輯User，ShoppingItem或ShoppingList項目（代碼如下）時，我遇到了渦輪增壓器管理控制器拋出錯誤的問題。出現的錯誤是AttributeError: 'function' object has no attribute 'primary_key'。在幀中的局部變量總會回來的一樣：Turbogears2 AdminController拋出一個多對多關係的錯誤

mapper 
<Mapper at 0x3719810; ShoppingList> 
fields 
['id'] 
self  
<sprox.sa.provider.SAORMProvider instance at 0x03E537B0> 
value 
<bound method OrderedProperties.items of <sqlalchemy.util._collections.OrderedProperties object at 0x037199F0>> 
entity 
<class 'insertmealhere.model.shoppinglist.ShoppingList'> 
field_name 
'items'

我無法搞清楚這是什麼，並且在代碼中的其他地方進行配置，而不是其他許多一對多的關係之間的不同拋出這個錯誤。我正在Windows 8.1系統上運行Python 2.7.8上的Turbogears 2.2。任何幫助是極大的讚賞。

list_item_table = Table("list_item_table", metadata, 
        Column('item_id', Integer, ForeignKey('shopping_item.id', onupdate="CASCADE", ondelete="CASCADE"), primary_key=True), 
        Column('list_id', Integer, ForeignKey('shopping_list.id', onupdate="CASCADE", ondelete='CASCADE'), primary_key=True)) 


class ShoppingItem(DeclarativeBase): 
__tablename__ = "shopping_item" 

id = Column(Integer, primary_key=True) 
name = Column(String(50)) 
quantity = Column(String(5)) 
measure = Column(String(10)) 

# less important optional parameters that will be useful for users 
brand = Column(String(50)) 

list_id = Column(Integer, ForeignKey('shopping_list.id')) 
shopping_list = relation("ShoppingList", secondary=list_item_table, backref="items") 

def get_owner_id(self): 
    return self.list.user_id 

@classmethod 
def delete_list(cls, id, user_id): 
    item = DBSession.query(cls).filter_by(id=id).one() # get the item from the given ID 
    if item.get_owner_id() == user_id: # owned by current user 
     DBSession.delete(item) # delete from shopping list 
     return True 
    flash(_("You do not have authorization to perform that action.")) 
    return False 



class ShoppingList(DeclarativeBase): 
__tablename__ = 'shopping_list' 

id = Column(Integer, primary_key=True) 
date = Column(Date, index=True, nullable=False) 
static = Column(Boolean, nullable=False, default=False) 
# static is true if the items from the meal plan have been imported into the shopping list. Once done you can edit 
# the items in the shopping list, remove items, etc. Until the shopping list is made static it is impossible to edit 
# the items that are imported from the schedule as they do not exist in the shopping list! (and we do not want to 
# edit them in the recipe! 

user_id = Column(Integer, ForeignKey('tg_user.user_id')) 
user = relation("User", backref="shopping_lists") 

date_user_list = Index('date_user_list', 'date', 'user_id')

來源

2014-09-28 Sam Justice

或許是在交代不清的SQLAlchemy的ShoppingItem模型類的list_id = Column(Integer, ForeignKey('shopping_list.id'))？

來源

2015-01-06 19:11:03 moschlar

Turbogears2 AdminController拋出一個多對多關係的錯誤

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