Core_Be/Models/CustomerSubItem.cs

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Fitness_core_BE.Models
{
    public class CustomerSubItem
    {
        [Key]
        public Guid CustomerSubItemId { get; set; }

        public Guid FKCustomerSubscriptionId { get; set; }
        [ForeignKey("FKCustomerSubscriptionId")]
        public virtual CustomerSubscription CustomerSubscription { get; set; }

        public string? SubItemName { get; set; }
        public string? SubItemDescription { get; set; }
        public decimal SubItemPrice { get; set; }

        // "OneTime" (charged once, e.g. via a supplemental invoice) | "Recurring" (carried
        // forward onto the invoice each time this subscription renews/upgrades).
        public string Frequency { get; set; } = "OneTime";

        public bool IsActive { get; set; } = true;
        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    }
}