我有两种型号: -
客户和帐户。
客户has_one帐户和帐户belongs_to客户
我想加入表并只获取一些字段。我的代码: -
Customer.joins(:account).select("customers.id, customers.name, accounts.opening_balance")
它在结果中给我Customer :: ActiveRecord_Relation,如下所示: -
[#<Customer:0x00000005be0870 id: 1774, name: "James TEA">,
#<Customer:0x00000005be0730 id: 1777, name: "Joseph STORE">,
#<Customer:0x00000005be0578 id: 1835, name: "John CONFECTIONARY">,
#<Customer:0x00000005be03e8 id: 1836, name: "Jerry PAN SHOP">]
无论我做什么,我都无法从右表中获取字段(在这种情况下为帐户)。有什么帮助吗?
答案 0 :(得分:2)
尝试:
customers = Customer.joins(:account).select("customers.id, customers.name, accounts.opening_balance as opening_balance")
customers.first.opening_balance