1     public class DataBaseStartup: ISelfStartup
 2     {
 3
 4         public void ConfigureServices(IServiceCollection services, IConfigurationRoot configuration)
 5         {
 6             services.AddDbContext<SelfDbContext>(x => x.UseMySql(configuration.GetConnectionString("MySql")));
 7         }
 8
 9         public void Configure(IApplicationBuilder application)
10         {
11             var dbContext=EngineContext.Current.ServiceProvider.GetService<SelfDbContext>();
12             dbContext.Database.EnsureCreated();
13         }
14
15         public int Order { get; } = 1;
16     }

    public SelfDbContext(DbContextOptions options) : base(options){}protected override void OnModelCreating(ModelBuilder modelBuilder){modelBuilder.AddEntityConfigurationsFromAssembly(GetType().Assembly);base.OnModelCreating(modelBuilder);}

 1     public static class ModelBuilderExtenions
 2     {
 3         private static IEnumerable<Type> GetMappingTypes(this Assembly assembly, Type mappingInterface)
 4         {
 5             return assembly.GetTypes().Where(x => !x.IsAbstract && !x.IsGenericType && !x.IsInterface && x.GetInterfaces().Any(y => y == mappingInterface));
 6         }
 7
 8         public static void AddEntityConfigurationsFromAssembly(this ModelBuilder modelBuilder, Assembly assembly)
 9         {
10             var mappingTypes = assembly.GetMappingTypes(typeof(ISelfEntityMappingConfiguration));
11             foreach (var config in mappingTypes.Select(Activator.CreateInstance).Cast<ISelfEntityMappingConfiguration>())
12             {
13                 config.Map(modelBuilder);
14             }
15         }
16     }

 1     public  class StudentMapping : ISelfEntityMappingConfiguration
 2     {
 3         public void Map(ModelBuilder b)
 4         {
 5             b.Entity<Student>().ToTable("Student")
 6                 .HasKey(p => p.Id);
 7
 8             b.Entity<Student>().Property(p => p.Class).HasMaxLength(50).IsRequired();
 9             b.Entity<Student>().Property(p => p.Name).HasMaxLength(50);
10         }
11     }

1     public interface ISelfEntityMappingConfiguration
2     {
3         void Map(ModelBuilder b);
4     }

1     public class Student:BaseEntity
2     {
3         public string Name { get; set; }
4
5         public string Class { get; set; }
6     }