Add constraint to instruction set.

Cicm.Database/Models/InstructionSet.cs

@@ -30,6 +30,7 @@
 
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
+using Microsoft.AspNetCore.Mvc;
 
 namespace Cicm.Database.Models
 {
@@ -42,6 +43,7 @@ namespace Cicm.Database.Models
 
         [Required]
         [StringLength(45)]
+        [Remote("VerifyUnique", "InstructionSets", "Admin")]
         public string Name { get; set; }
 
         public virtual ICollection<Processor> Processors { get; set; }

cicm_web/Areas/Admin/Controllers/InstructionSetsController.cs

@@ -28,6 +28,7 @@
 // Copyright © 2003-2018 Natalia Portillo
 *******************************************************************************/
 
+using System;
 using System.Linq;
 using System.Threading.Tasks;
 using Cicm.Database.Models;
@@ -147,5 +148,11 @@ namespace cicm_web.Areas.Admin.Controllers
         {
             return _context.InstructionSets.Any(e => e.Id == id);
         }
+
+        [AcceptVerbs("Get", "Post")]
+        public IActionResult VerifyUnique(string name) =>
+            _context.InstructionSets.Any(i => string.Equals(i.Name, name, StringComparison.InvariantCultureIgnoreCase))
+                ? Json("Instruction set already exists.")
+                : Json(true);
     }
 }

cicm_web/cicm_web.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
-    <Version>3.0.99.518</Version>
+    <Version>3.0.99.520</Version>
     <Company>Canary Islands Computer Museum</Company>
     <Copyright>Copyright © 2003-2018 Natalia Portillo</Copyright>
     <Product>Canary Islands Computer Museum Website</Product>