ASP.NET MVC 5 Identity 默认表映射修改

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            if (modelBuilder == null)
            {
                throw new ArgumentNullException("modelBuilder");
            }

            var user = modelBuilder.Entity<IdentityUser>()
            .ToTable("Users");
            user.HasMany(u => u.Roles).WithRequired().HasForeignKey(ur => ur.UserId);
            user.HasMany(u => u.Claims).WithRequired().HasForeignKey(uc => uc.UserId);
            user.HasMany(u => u.Logins).WithRequired().HasForeignKey(ul => ul.UserId);
            user.Property(u => u.UserName)
            .IsRequired()
            .HasMaxLength(256)
            .HasColumnAnnotation("Index", new IndexAnnotation(new IndexAttribute("UserNameIndex") { IsUnique = true }));

            user.Property(u => u.Email).HasMaxLength(256);

            modelBuilder.Entity<IdentityUserRole>()
            .HasKey(r => new { r.UserId, r.RoleId })
            .ToTable("UserRoles");

            modelBuilder.Entity<IdentityUserLogin>()
            .HasKey(l => new { l.LoginProvider, l.ProviderKey, l.UserId })
            .ToTable("UserLogins");

            modelBuilder.Entity<IdentityUserClaim>()
            .ToTable("UserClaims");

            var role = modelBuilder.Entity<IdentityRole>()
            .ToTable("Roles");
            role.Property(r => r.Name)
            .IsRequired()
            .HasMaxLength(256)
            .HasColumnAnnotation("Index", new IndexAnnotation(new IndexAttribute("RoleNameIndex") { IsUnique = true }));
            role.HasMany(r => r.Users).WithRequired().HasForeignKey(ur => ur.RoleId);
        }