ruby-on-rails - Money-Rails gem : Humanized_money in Models

Question

在我的捐赠模型中，我已将 amount_cents 列货币化

我需要模型中捐赠金额的人性化版本(例如 643.50)，以便我可以生成 PDF 收据并将其发送给捐赠者。

我试过 humanized_money(self.amount) 和 self.amount.humanized_money 但得到错误:

NoMethodError: undefined method `humanized_money' for #<Donation:0x007fa687ebb678>

如何在模型中获得这种人性化的形式？

class Donation < ActiveRecord::Base
  belongs_to :donatable, polymorphic: true
  belongs_to :added_by_user, foreign_key: "added_by", class_name: "User"

  store_accessor :details, :method

  monetize :amount_cents

  def donations_this_week(branch_id)
    sum =  Donation.sum(:amount_cents).to_money
    return humanized_money(sum)
  end

  def receipt
    Receipts::Receipt.new(
        id: id,
        product: "GoRails",
        message: "This receipt is to acknowledge that we have received a donation with the below details from #{self.donatable.name}",
        company: {
            name: self.donatable.branch.organization.name,
            address: "#{self.donatable.branch.address_line_1}\n#{self.donatable.branch.address_line_2}\n#{self.donatable.branch.email}\n#{self.donatable.branch.legal_details}",
            email: self.donatable.branch.email,
            logo: self.donatable.branch.organization.logo.url(:medium),
        },
        line_items: [
            ["Date",           created_at.to_s],
            ["Donor Name", self.donatable.name],
            ["Amount",         humanized_money(self.amount)],
            ["Payment Method",     self.method],
        ]
    )
  end
end

以下是数据库架构:

create_table "donations", force: :cascade do |t|
t.string   "donatable_type"
t.integer  "donatable_id"
t.integer  "amount_cents"
t.datetime "created_at",                  null: false
t.datetime "updated_at",                  null: false
t.datetime "date"
t.integer  "added_by"
t.jsonb    "details",        default: {}, null: false

Answer 1

在不加载所有内容的情况下执行此操作 ActionView::Base .你可以做

return ActionController::Base.helpers.humanized_money sum