Feature: Device Batch Attachments

allows for attachments to be uploaded and associated with Device Batches

Disco.Models/Repository/Device/DeviceBatchAttachment.cs

@@ -0,0 +1,38 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Disco.Models.Repository
+{
+    public class DeviceBatchAttachment : IAttachment
+    {
+        [Key]
+        public int Id { get; set; }
+        public int DeviceBatchId { get; set; }
+        [Required]
+        public string TechUserId { get; set; }
+        [StringLength(500), Required]
+        public string Filename { get; set; }
+        [Required, StringLength(500)]
+        public string MimeType { get; set; }
+        public DateTime Timestamp { get; set; }
+        [Required, StringLength(500)]
+        public string Comments { get; set; }
+        
+        [NotMapped]
+        public object Reference => DeviceBatchId;
+
+        [NotMapped]
+        public AttachmentTypes AttachmentType => AttachmentTypes.DeviceBatch;
+
+        [NotMapped]
+        public string DocumentTemplateId { get => throw new NotSupportedException(); set => throw new NotSupportedException(); }
+
+
+        [InverseProperty(nameof(Repository.DeviceBatch.DeviceBatchAttachments)), ForeignKey(nameof(DeviceBatchId))]
+        public virtual DeviceBatch DeviceBatch { get; set; }
+
+        [ForeignKey("TechUserId")]
+        public virtual User TechUser { get; set; }
+    }
+}