On Rails的3.1 RC6,给予ActiveRecord的STI:我怎样才能摆脱父类的默认范围
class Animal < ActiveRecord::Base
default_scope where(legs: 4)
end
下不能按预期工作:
class Man < Animal
default_scope unscoped.where(legs: 2)
end
产生的SQL语句看起来像这样:
SELECT * FROM animals WHERE legs = 4 AND legs = 2
我怎样才能完全重写父类的默认范围?
我也试过以下其中没有工作:
default_scope{ unscoped.where legs: 2 }
default_scope with_exclusive_scope{ legs: 2 }
看来,这部作品在Rails的3.0:self.default_scoping = [] – jemminger