Onion Framework SourceCode

Note Onion - Domain - NoteEntity

Here is the source code for NoteEntity.cs file it is placed in the Entities directory of the Note.Domain project.

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namespace Note.Domain.Entities
{
    using System;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;

    public class NoteEntity
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public long Id { get; set; }

        public DateTime Dt { get; set; }

        [StringLength(40)]
        public string Who { get; set; }

        [Required]
        //[ForeignKey("NoteType")]
        // https://stackoverflow.com/questions/5542864/how-should-i-declare-foreign-key-relationships-using-code-first-entity-framework
        // This will be recognized as FK by NavigationPropertyNameForeignKeyDiscoveryConvention
        //[ForeignKey("NoteTypeEntity")]
        public long NoteTypeId { get; set; }
        public virtual NoteTypeEntity NoteTypeEntity { get; set; }

        [Column(TypeName = "nvarchar(max)")]
        public string Note { get; set; }

        [StringLength(255)]
        public string CompanyKey { get; set; }

        [StringLength(255)]
        public string ApplicationSubKey { get; set; }

        [StringLength(255)]
        public string ApplicationKey { get; set; }
    }
}

A couple of notes.

  • Compared to the Telerik article, these attributes have annotations which help define the validity of the data. I have included 2 using systements to help support this feature.
  • The ApplicationKey, and ApplicationSubKey columns are intended to help differentiate the notes for different applications in a company. For example the company might have a GL and a DD application. GL might have AR, and AP objects which depend on notes. So maybe we would have an applicationKey of “GL-AR”, and for objects 1 through 4, we would have applicationSubKeys of 1 through 2.