ruby-on-rails - Rails 4 链接范围

Question

我想重用我定义的范围，但它返回一个数组。

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

当我调用函数 findNextAuctions 时，我收到此错误：

  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 没有 OR 语句。您可以直接编写 SQL，例如

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