"Correct" 如何根据 rails 中的请求创建关系？

Question

示例 post 对控制器的请求：

{
  "card": 1,
  "cardPot": 6,
  "purchases": [
    {
      "description": "groceries",
      "amount": "40.60",
      "transaction_date": "17/02/2022",
      "statement_reference": "10076608",
      "statement_description": "SAINSBURYS              ",
      "reimbursements": [
        {
          "amount": "19.00",
          "pot": 3
        },
        {
          "amount": "21.60",
          "pot": 7
        },
      ],
      "spread": false
    }, 
    ....
  ]
}

采购有多次报销，报销属于采购...

在我的控制器中，我正在做：

  def import
    card_id = params[:card]
    card = CreditCard.find_by(id: card_id)
    pay_to_pot = params[:cardPot]
    purchases = params[:purchases]
    purchases.each do |p|
      purchase_params = p.permit(:description, :amount, :transaction_date, :statement_reference, :statement_description).merge({user_id: 1, credit_card_id: card_id})
      new_purchase = Purchase.create(purchase_params)
      p[:reimbursements].each do |r|
        start_date = p[:start_date] || Date.today
        instalments = p[:spread] ? card.free_months_remaining : 1
        Reimbursement.create({purchase_id: new_purchase.id, instalments: instalments, user_id: 1, pay_to_pot_id: pay_to_pot, pay_from_pot_id: r[:pot], total_amount: p[:amount], start_date: start_date })
      end
    end
  end

这达到了预期的效果，但感觉我可以更有效地做到这一点，and/or这不是标准约定。我可以创建所有购买实体而无需执行 each，但是我需要一些方法来创建报销并将它们 link 到购买 ID

注意：显然 user_id: 1 不会投入生产！入门时的便利。

Answer 1

你可以使用Active Record Nested Attributes，它应该创建关联关系。

对于请求中不存在的自定义参数，您可以在相应模型上添加保存前回调并设置值。

"Correct" 如何根据 rails 中的请求创建关系？

"Correct" way to create relations from a request in rails?

ruby-on-rails