Model Class: DepartmentInfo.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using SnapObjects.Data;
using Newtonsoft.Json;

namespace Appeon.ApiDoc.Models.School
{
    /// <summary>
    /// This model class maps to the dbo.Department table. 
    /// It uses the primary key to generate the Where clause for the Update operation. 
    /// 
    /// DepartmentID is the primary key. 
    /// The Courses property is applied with the ModelEmbedded attribute. 
    /// The ModelEmbedded attribute defines the one-to-more relationship between the department and the courses.
    /// </summary>
    [Table("Department", Schema = "dbo")]
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyColumns)]
    public class DepartmentInfo
    {
        [Key]
        public Int32 DepartmentID { get; set; }

        public String Name { get; set; }

        public Decimal Budget { get; set; }

        public DateTime StartDate { get; set; }

        public Int32? Administrator { get; set; }

        [JsonIgnore]
        [SetValue("$DepartmentID", "$DepartmentID", SetValueStrategy.Always)]
        [ModelEmbedded(typeof(CourseInfo), ParamValue = "$DepartmentID", 
            CascadeCreate = true, CascadeDelete = true)]
        public IList<CourseInfo> Courses { get; set; }
    }
}