NetCore3.1配置FluentApi

一、自定义配置类实现IEntityTypeConfiguration<T>接口

public class SecurityConfiguration:IEntityTypeConfiguration<Security>
    {
        public void Configure(EntityTypeBuilder<Security> builder)
        {
            builder.Property(e => e.Id).HasColumnName("SecurityId");

            builder.Property(e => e.UserName).IsRequired().HasMaxLength(100);

            builder.Property(e => e.User).IsRequired().HasMaxLength(50);

            builder.Property(e => e.Password).IsRequired().HasMaxLength(200);

            builder.Property(e => e.Role)
                .IsRequired()
                .HasMaxLength(15)
                .HasConversion(
                e=>e.ToString(),
                e=>(RoleType)Enum.Parse(typeof(RoleType),e));

        }

    }

二、在DbContext中通过程序集加载

  protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());
        }