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RS_system/Models/Ofrenda.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Rs_system.Models;
+
+/// <summary>
+/// Ofrenda individual dentro de un registro de culto
+/// </summary>
+[Table("ofrendas")]
+public class Ofrenda
+{
+    [Key]
+    [Column("id")]
+    public long Id { get; set; }
+    
+    [Column("registro_culto_id")]
+    [Required]
+    public long RegistroCultoId { get; set; }
+    
+    [Column("monto")]
+    [Required]
+    [Range(0.01, 999999.99)]
+    public decimal Monto { get; set; }
+    
+    [Column("concepto")]
+    [Required]
+    [StringLength(200)]
+    public string Concepto { get; set; } = string.Empty;
+    
+    [Column("eliminado")]
+    public bool Eliminado { get; set; } = false;
+    
+    // Navigation properties
+    [ForeignKey("RegistroCultoId")]
+    public virtual RegistroCulto? RegistroCulto { get; set; }
+    
+    public virtual ICollection<DescuentoOfrenda> Descuentos { get; set; } = new List<DescuentoOfrenda>();
+    
+    // Calculated properties
+    [NotMapped]
+    public decimal TotalDescuentos => Descuentos?.Where(d => !d.Eliminado).Sum(d => d.Monto) ?? 0;
+    
+    [NotMapped]
+    public decimal MontoNeto => Monto - TotalDescuentos;
+}