Created
March 7, 2014 22:30
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class Order < ActiveRecord::Base | |
def self.fulfillable_for(product_id) | |
select("orders.*, COUNT(up.product_id) AS unfulfillable"). | |
joins(:order_items). | |
joins("LEFT JOIN order_items oi ON oi.order_id = order_items.order_id AND oi.product_id != order_items.product_id"). | |
joins("LEFT JOIN products up ON up.product_id = oi.product_id AND up.available_at > #{ActiveRecord::Base.sanitize(Date.today)}"). | |
where(order_items: { product_id: product_id} ). | |
group("order_items.order_id"). | |
having("unfulfillable <= 0") | |
end | |
def self.arel_fulfillable_for(product_id) | |
o = Order.arel_table | |
i = OrderItem.arel_table | |
oi = OrderItem.arel_table.alias("other_items") | |
up = Product.arel_table.alias("unfulfillable_products") | |
select([o["*"], up[:product_id].count.as("unfulfillable")]). | |
joins(:order_items). | |
joins( | |
o. | |
join(oi, Arel::Nodes::OuterJoin).on( | |
oi[:order_id].eq(i[:order_id]).and( | |
oi[:product_id].not_eq(i[:product_id]) | |
)). | |
join(up, Arel::Nodes::OuterJoin).on( | |
up[:product_id].eq(oi[:product_id]).and( | |
up[:available_at].gt(Date.today)) | |
).join_sql | |
). | |
where(i[:product_id].eq(product_id)). | |
group(i[:order_id]). | |
having("unfulfillable <= 0") | |
end | |
end |
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