Ruby on rails 具有即时方法列的活动管理自定义索引
我有一个用户模型Ruby on rails 具有即时方法列的活动管理自定义索引,ruby-on-rails,ruby,ruby-on-rails-5,activeadmin,Ruby On Rails,Ruby,Ruby On Rails 5,Activeadmin,我有一个用户模型 class User < ApplicationRecord has_many :payments, dependent: :destroy has_many :debts, dependent: :destroy def balance @balance = self.payments.sum(:amount) - self.debts.sum(:amount) end end 如何在用户模型上使用my instance方法显示索引上的余额 column 'B
class User < ApplicationRecord
has_many :payments, dependent: :destroy
has_many :debts, dependent: :destroy
def balance
@balance = self.payments.sum(:amount) - self.debts.sum(:amount)
end
end
如何在用户模型上使用my instance方法显示索引上的余额
column 'Balance' do |user|
user.balance
end
column 'Balance' do |user|
user.balance
end