gestion des versions :

* dossier des versions = FullString
* Suppressioni de versions

src/nuget-host/Data/ApplicationDbContext.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
 using nuget_host.Data;
@@ -14,7 +15,15 @@ namespace nuget_host.Data
             : base(options)
         {
         }
-        
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            base.OnModelCreating(modelBuilder);
+            modelBuilder.Entity<PackageVersion>().HasKey(v => new 
+            { 
+                v.PackageId, 
+                v.FullString 
+            });
+        }
         public DbSet<ApiKey> ApiKeys { get; set; }
         public DbSet<Package> Packages { get; set; }
         public DbSet<PackageVersion> PackageVersions { get; set; }