Rails嵌套N + 1查询问题

Question

My Associations are like this:

vendor has shipments  
shipment has order
order has products

In My controller I have written as

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

But in my view I am using like

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

So it is returning N+1 Query issue by Rails 'bullet' gem

Anyone Help me to resolve this problem of Nested N+1 Query Issue? How I need to write in the controller?

Answer 1

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

should work. Read more about it here http://guides.rubyonrails.org/active_record_querying.html#nested-associations-hash