Modified BatchId column in Document table to accept null values.

Marco.Pms.DataAccess/Migrations/20250423095655_Made_BatchId_Nullable_In_Document.cs

@@ -0,0 +1,41 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Marco.Pms.DataAccess.Migrations
+{
+    /// <inheritdoc />
+    public partial class Made_BatchId_Nullable_In_Document : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<Guid>(
+                name: "BatchId",
+                table: "Documents",
+                type: "char(36)",
+                nullable: true,
+                collation: "ascii_general_ci",
+                oldClrType: typeof(Guid),
+                oldType: "char(36)")
+                .OldAnnotation("Relational:Collation", "ascii_general_ci");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<Guid>(
+                name: "BatchId",
+                table: "Documents",
+                type: "char(36)",
+                nullable: false,
+                defaultValue: new Guid("00000000-0000-0000-0000-000000000000"),
+                collation: "ascii_general_ci",
+                oldClrType: typeof(Guid),
+                oldType: "char(36)",
+                oldNullable: true)
+                .OldAnnotation("Relational:Collation", "ascii_general_ci");
+        }
+    }
+}

Marco.Pms.DataAccess/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -284,7 +284,7 @@ namespace Marco.Pms.DataAccess.Migrations
                     b.Property<string>("Base64Data")
                         .HasColumnType("longtext");
 
-                    b.Property<Guid>("BatchId")
+                    b.Property<Guid?>("BatchId")
                         .HasColumnType("char(36)");
 
                     b.Property<string>("ContentType")

Marco.Pms.Model/DocumentManager/Document.cs

@@ -7,7 +7,7 @@ namespace Marco.Pms.Model.DocumentManager
     public class Document
     {
         public Guid Id { get; set; }
-        public Guid BatchId { get; set; }
+        public Guid? BatchId { get; set; }
         public string FileName { get; set; } = string.Empty;
         /// <summary>
         ///  Full S3 object key