ruby-on-rails - Rails 嵌套 N+1 查询问题

Question

我的协会是这样的：

vendor has shipments  
shipment has order
order has products

在我的控制器中，我写成

@shipments = @vendor.shipments.includes(:order)

但在我看来，我使用的是

shipment.order.products.collect(&:name)

所以它返回了 Rails 'bullet' gem 的 N+1 Query 问题

有人帮我解决嵌套 N+1 查询问题吗？我需要如何在控制器中写入？

score 9 · Accepted Answer

@shipments = @vendor.shipments.includes(:order => :products)

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