Rails 4鏈接範圍

Question

我想重用我定義的範圍，但它返回一個數組。

scope :currents, -> { (where('started_at < NOW()') | where('started_at' => nil)) & where('ended_at > NOW()') & where('published_at < NOW()') } 

def self.findNextAuctions() 
    currents.order(ended_at: :asc).limit(3) 
end 

當我調用該函數findNextAuctions我得到這個錯誤：

1) Error: 
AuctionTest#test_should_fint_next_auctions: 
NoMethodError: undefined method `order' for #<Array:0x007fae5d6e3878> 
    app/models/auction.rb:13:in `findNextAuctions' 
    test/models/auction_test.rb:14:in `block in <class:AuctionTest>' 

Answer 1

Rails不具有或聲明。你可以直接編寫SQL，雖然這樣的東西就像

where("(started_at < NOW() or started_at = null) and ended_at > NOW() and published_at < NOW()")