EF 配置

    public class ZSZDbContext : DbContext
    {
        //ILog ILogger 容易混淆
        private static ILog log = LogManager.GetLogger(typeof(ZSZDbContext));

        public ZSZDbContext() : base("name=connstr")
        //name=conn1表示使用连接字符串中名字为conn1的去连接数据库
        {
            Database.SetInitializer<ZSZDbContext>(null);
            this.Database.Log = sql =>
            {
                log.DebugFormat("EF执行SQL：{0}", sql);
            };
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.Configurations.AddFromAssembly(Assembly.GetExecutingAssembly());
        }
        public DbSet<AdminUserEntity> AdminUsers { get; set; }
        public DbSet<UserEntity> Users { get; set; }
        public DbSet<CityEntity> Cities { get; set; }
        public DbSet<CommunityEntity> Communities { get; set; }
        public DbSet<PermissionEntity> Permissions { get; set; }
        public DbSet<RegionEntity> Regions { get; set; }
        public DbSet<RoleEntity> Roles { get; set; }
        public DbSet<SettingEntity> Settings { get; set; }
        public DbSet<AttachmentEntity> Attachments { get; set; }
        public DbSet<HouseEntity> Houses { get; set; }
        public DbSet<HouseAppointmentEntity> HouseAppointments { get; set; }
        public DbSet<IdNameEntity> IdNames { get; set; }
        public DbSet<HousePicEntity> HousePics { get; set; }
        public DbSet<AdminLogEntity> AdminUserLogs { get; set; }
    }

    public class HouseEntity : BaseEntity
    {
        public long CommunityId { get; set; }
        public virtual CommunityEntity Community { get; set; }
        public long RoomTypeId { get; set; }
        public virtual IdNameEntity RoomType { get; set; }
        public string Address { get; set; }
        public int MonthRent { get; set; }
        public long StatusId { get; set; }
        public virtual IdNameEntity Status { get; set; }
        public decimal Area { get; set; }
        public long DecorateStatusId { get; set; }
        public virtual IdNameEntity DecorateStatus { get; set; }
        public int TotalFloorCount { get; set; }
        public int FloorIndex { get; set; }
        public long TypeId { get; set; }
        public virtual IdNameEntity Type { get; set; }
        public string Direction { get; set; }
        public DateTime LookableDateTime { get; set; }
        public DateTime CheckInDateTime { get; set; }
        public string OwnerName { get; set; }
        public string OwnerPhoneNum { get; set; }
        public string Description { get; set; }

        public virtual ICollection<AttachmentEntity> Attachments { get; set; } = new List<AttachmentEntity>();
        public virtual ICollection<HousePicEntity> HousePics { get; set; } = new List<HousePicEntity>();
    }

    class HouseConfig : EntityTypeConfiguration<HouseEntity>
    {
        public HouseConfig()
        {
            ToTable("T_Houses");
            HasRequired(h => h.Community).WithMany().HasForeignKey(h => h.CommunityId).WillCascadeOnDelete(false);
            HasRequired(h => h.RoomType).WithMany().HasForeignKey(h => h.RoomTypeId).WillCascadeOnDelete(false);
            HasRequired(h => h.Status).WithMany().HasForeignKey(h => h.StatusId).WillCascadeOnDelete(false);
            HasRequired(h => h.DecorateStatus).WithMany().HasForeignKey(h => h.DecorateStatusId).WillCascadeOnDelete(false);
            HasRequired(h => h.Type).WithMany().HasForeignKey(h => h.TypeId).WillCascadeOnDelete(false);
            Property(h => h.Address).IsRequired().HasMaxLength(128);
            Property(h => h.Description).IsOptional();
            Property(h => h.Direction).IsRequired().HasMaxLength(20);
            Property(h => h.OwnerName).IsRequired().HasMaxLength(20);
            Property(h => h.OwnerPhoneNum).IsRequired().HasMaxLength(20).IsUnicode(false);
        }
    }