Rails 3 将相关模型加入其默认范围
我正在尝试使用以下设置跨模型进行查询
Class Scorecard < AR::Base
default_scope where(:archived => false)
belongs_to :user
has_many :scorecard_metrics
end
Class ScorecardMetric < AR::Base
belongs_to :scorecard
end
Class User < AR::Base
has_many :scorecards
end
我正在尝试使用连接记分卡的命名范围从记分卡指标进行查询，并且我希望它包含记分卡的默认范围，我当前的实现（有效）如下
# on ScorecardMetric
scope :for_user, lambda {
|user| joins(:scorecard).
where("scorecards.user_id = ? and scorecards.archived = ?", user.id, false)
}
所示对我来说似乎很混乱，有什么方法可以加入并包含加入关联的默认范围吗？
I'm trying to query across models with the following setup
Class Scorecard < AR::Base
default_scope where(:archived => false)
belongs_to :user
has_many :scorecard_metrics
end
Class ScorecardMetric < AR::Base
belongs_to :scorecard
end
Class User < AR::Base
has_many :scorecards
end
I am trying to query from scorecard metrics with a named scope that joins scorecard and I want it to include the default scope for scorecard, my current implementation (which works) looks like this
# on ScorecardMetric
scope :for_user, lambda {
|user| joins(:scorecard).
where("scorecards.user_id = ? and scorecards.archived = ?", user.id, false)
}
This just seems messy to me, is there any way to join and include the default scope of the joined association?
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看起来我找到了我正在寻找的答案，我刚刚这样做了，
没有重复的逻辑就好多了
Looks like I found the answer I was looking for, I just did this
which is much nicer without the duplicated logic