SQLalchemy AttributeError：'str'对象没有属性'_sa_instance_state'

SQLalchemy AttributeError：'str'对象没有属性'_sa_instance_state'

我认为问题在于您如何定义相关的公司架构：

JawboneUP3 = item(itemID = "1", name = "Jawbone UP3", description = "The latest UP!",        category = "tracker", price = "4.99", company = "Jawbone")    # HERE^

该

item

构造函数需要一个

company

实例，但你传递一个字符串值。修理它：

JawboneUP3 = item(itemID="1",        name="Jawbone UP3",        description="The latest UP!",        category="tracker",        price="4.99",        company=company(name="Jawbone"))