添加项目文件。

TechHelper.Server/Context/Configuration/RoleConfiguration.cs

@@ -0,0 +1,25 @@
+using Entities.Contracts;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace TechHelper.Context.Configuration
+{
+
+	public class RoleConfiguration : IEntityTypeConfiguration<IdentityRole<Guid>>
+	{
+		public void Configure(EntityTypeBuilder<IdentityRole<Guid>> builder)
+		{
+			builder.HasData(
+		   Enum.GetValues(typeof(UserRoles))
+			   .Cast<UserRoles>()
+			   .Select(roleEnum => new IdentityRole<Guid>
+			   {
+				   Id = Guid.NewGuid(), 
+				   Name = roleEnum.ToString(), 
+				   NormalizedName = roleEnum.ToString().ToUpper() 
+			   })
+			   .ToArray());
+		}
+	}
+}