feat(dal): в таблице Hosts поле Ek сделано уникальным

PARR.DAL/Migrations/20240604221258_tblHostsEkIsUnique.cs

@@ -0,0 +1,46 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PARR.DAL.Migrations
+{
+    /// <inheritdoc />
+    public partial class tblHostsEkIsUnique : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Hosts_Ek_IP",
+                table: "Hosts");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Hosts_Ek",
+                table: "Hosts",
+                column: "Ek",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Hosts_IP",
+                table: "Hosts",
+                column: "IP");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Hosts_Ek",
+                table: "Hosts");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Hosts_IP",
+                table: "Hosts");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Hosts_Ek_IP",
+                table: "Hosts",
+                columns: new[] { "Ek", "IP" });
+        }
+    }
+}

PARR.DAL/Migrations/DataContextModelSnapshot.cs

@@ -1419,14 +1419,17 @@ namespace PARR.DAL.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("Ek")
+                        .IsUnique();
+
                     b.HasIndex("EkStatusCode");
 
+                    b.HasIndex("IP");
+
                     b.HasIndex("ResponseAreaCode");
 
                     b.HasIndex("WorkGroupId");
 
-                    b.HasIndex("Ek", "IP");
-
                     b.ToTable("Hosts");
                 });
 

PARR.DAL/Models/Host.cs

@@ -6,7 +6,8 @@ using System.ComponentModel.DataAnnotations.Schema;
 namespace PARR.DAL.Models
 {
     [Table("Hosts")]
-    [Index(nameof(Ek), nameof(IP))]
+    [Index(nameof(IP))]
+    [Index(nameof(Ek), IsUnique = true)]
     public class Host : IBase
     {
         [Key]