【DEBUG】unknown attribute
C:\Users\Gideon\Rails\Work\depot>rake db:migrate
(in C:/Users/Gideon/Rails/Work/depot)
== CombineItemsInCart: migrating ===============================
rake aborted!
An error has occurred, this and all later migrations canceled:
unknown attribute: 2
这是发生在migrate时报错，原因在于migration的代码有语法错误，attribute表示是属性赋值错误，代码如下：
# replace with a single item
cart.line_items.create(:product_id => product_id, quantity => quantity)
实际上应该是:quantity => quantity
问题很小
(in C:/Users/Gideon/Rails/Work/depot)
== CombineItemsInCart: migrating ===============================
rake aborted!
An error has occurred, this and all later migrations canceled:
unknown attribute: 2
这是发生在migrate时报错，原因在于migration的代码有语法错误，attribute表示是属性赋值错误，代码如下：
# replace with a single item
cart.line_items.create(:product_id => product_id, quantity => quantity)
实际上应该是:quantity => quantity
问题很小
