我以为我不再是菜鸟了,直到我偶然发现了这一点。
我正在尝试加载一个 html 列表,将每个用户的商店分组并显示每个商店、收据数量和总金额。
在 Sql 中,我可以使用 group by 轻松完成此操作,因此我尝试将 Shop Model 中的以下代码加载到 Rails 控制台中。
def self.group_receipts(user, search_hash=nil)
shop_ids = Shop.pluck(:id) & Receipt.from_companies(user, search_hash).pluck(:shop_id)
#greceipt means Grouped Receipt
greceipt = Struct.new(:name, :number_of_receipts, :total)
query = Shop.joins(:receipts).where('shops.id in (?)',shop_ids).select('shops.name,count(receipts.id) as number_of_receipts,sum(receipts.total) as total').group('shops.id')
query
end
这是我的输出
>> Shop.group_receipts(302).all
(2.0ms) SELECT id FROM "shops"
(3.0ms) SELECT shop_id FROM "receipts" WHERE (receipts.id IN (SELECT receipts.id
FROM receipts
INNER JOIN shops on shops.id=receipts.shop_id
INNER JOIN companies on companies.id = shops.company_id
INNER JOIN user_companies on user_companies.company_id = companies.id
WHERE user_companies.user_id = 302)) AND (receipts.is_manual is null or receipts.is_manual=false) ORDER BY receipts.created_at DESC
Shop Load (2.0ms) SELECT shops.name,count(receipts.id) as number_of_receipts,sum(receipts.total) as total FROM "shops" INNER JOIN "receipts" ON "receipts"."shop_id" = "shops"."id" WHERE (shops.id in (16)) GROUP BY shops.id
[#<Shop name: "Kirlin Osinski and Dooley">]
如果我的查询似乎没问题,为什么我的输出不是这样的name, 10, 1000
?
您在方法定义中找到的 greceipt 结构旨在创建一个结构,以便我们稍后可以访问 gs.name、gs.number_of_receipts、gs.total,但我不明白如何从上面显示的输出:-S。
有人来救援吗?