Trying to add multiple entry to a particar database active records on rails with a single post request

Question

i have an array of selected product_ids and product quantities i need to insert through active records into the rails database model in a single HTTP request. the orderitem arrays belong to an order_detail active record model. I need to be able to record this items into tghe database on clicking the "submit order" botton from the react client side.

def create
    order_detail = @user.order_details.create(order_detail_params)
    @order_item = OrderItem.create(order_item_params.merge(order_detail_id: order_detail.id))

    if @order_item.valid?
    render json: @order_item, status: :created
    else
    render json: @order_item.errors, status: :unprocessable_entity
end
 end

def order_item_params
   params.require(:order_item).permit([:quantity, :product_id])
end
def order_detail_params
   params.require(:order_detail).permit(:total )
end

Answer 1

You can use accepts_nested_attributes_for in your ActiveRecord model to create associated records more easily. In this case, you'll need to make a few changes to your OrderDetail model and the OrderDetailsController:

class OrderDetail < ApplicationRecord
  belongs_to :user
  has_many :order_items, dependent: :destroy

  accepts_nested_attributes_for :order_items

  # Your other validations and methods
end

class OrderDetailsController < ApplicationController
  before_action :set_user

  def create
    order_detail = @user.order_details.new(order_detail_params)

    if order_detail.save
      render json: order_detail, status: :created, include: :order_items
    else
      render json: order_detail.errors, status: :unprocessable_entity
    end
  end

  private

  def set_user
    @user = User.find(params[:user_id]) # Or, you can use current_user if you have authentication set up
  end

  def order_detail_params
    params.require(:order_detail).permit(:total, order_items_attributes: [:product_id, :quantity])
  end
end

With this setup, Rails will automatically create associated OrderItem records for you when you create an OrderDetail record.

Here's an example of the JSON payload:

{
  "order_detail": {
    "total": 100.00,
    "order_items_attributes": [
      {
        "product_id": 1,
        "quantity": 2
      },
      {
        "product_id": 3,
        "quantity": 1
      }
    ]
  }
}