Creating Person Entity

We define entities in .Core (domain) project (in server side). We can define a Person entity (mapped to PbPersons table in database) to represent a person in phone book as shown below (I created in a new folder/namespace named PhoneBook):

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using Abp.Domain.Entities.Auditing;

namespace Acme.PhoneBookDemo.PhoneBook
{
    [Table("PbPersons")]
    public class Person : FullAuditedEntity
    {
        public const int MaxNameLength = 32;
        public const int MaxSurnameLength = 32;
        public const int MaxEmailAddressLength = 255;

        [Required]
        [MaxLength(MaxNameLength)]
        public virtual string Name { get; set; }

        [Required]
        [MaxLength(MaxSurnameLength)]
        public virtual string Surname { get; set; }

        [MaxLength(MaxEmailAddressLength)]
        public virtual string EmailAddress { get; set; }
    }
}

Person's primary key type is int (as default). It inherits FullAuditedEntity that contains creation, modification and deletion audit properties. It's also soft-delete. When we delete a person, it's not deleted by database but marked as deleted (see entity and data filters documentations for more information). We created consts for MaxLength properties. This is a good practice since we will use same values later.

We add a DbSet property for Person entity to PhoneBookDemoDbContext class defined in .EntityFrameworkCore project.

public class PhoneBookDemoDbContext : AbpZeroDbContext<Tenant, Role, User>
{
    public virtual DbSet<Person> Persons { get; set; }

    //...other code
}

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