标签:style blog color io 使用 ar for strong 数据
网络上常常看到有ef 1对1 1对多等关系的描述,按照我的理解,其根本就是为了呈现出一个视图,我最近设计了一个ef关系,请大家看一看。
在gps车辆信息管理中,有个开户需求,其根本就是三种关系的对应,车辆信息,sim卡信息,以及终端信息,这三个实体是一一对应的,一旦开户,就需要三种信息。
先设计三种关系实体
/// <summary> /// 实体模型抽象类 /// </summary> public abstract class DbSetBase : IDbSetBase { /// <summary> /// 构造函数 /// </summary> public DbSetBase() { Id = Guid.NewGuid(); CreatedDate = DateTime.Now; Deleted = false; } /// <summary> /// 唯一Id /// </summary> [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } /// <summary> /// 创建时间 /// </summary> public DateTime CreatedDate { get; set; } /// <summary> /// 更新时间 /// </summary> public DateTime? UpdatedDate { get; set; } /// <summary> /// 是否删除 /// </summary> public bool Deleted { get; set; } /// <summary> /// 备注 /// </summary> public string Remark { get; set; } }
/// <summary> /// 车辆数据 /// </summary> [Table("S_VehicleInfo")] public class VehicleInfo : DbSetBase { /// <summary> /// 车牌号 /// </summary> public string VehicleNo { get; set; } /// <summary> /// 车牌颜色 /// </summary> public VehicleColor Color { get; set; } /// <summary> /// 企业信息 /// </summary> public Guid EnterpriseId { get; set; } /// <summary> /// 企业信息 /// </summary> [ForeignKey("EnterpriseId")] public virtual Enterprise Enterprise { get; set; } /// <summary> /// 使用状态 /// </summary> public UsingType UsingType { get; set; } /// <summary> /// 开户信息 /// </summary> public virtual OpenAccount Account { get; set; } /// <summary> /// 所属车队 /// </summary> public Guid? CompanyId { get; set; } /// <summary> /// 所属车队 /// </summary> [ForeignKey("CompanyId")] public virtual Company Company { get; set; } }
/// <summary> /// 终端信息 /// </summary> [Table("S_TerminalInfo")] public class TerminalInfo : DbSetBase { /// <summary> /// 终端Id /// </summary> public string TerminalNo { get; set; } /// <summary> /// 终端类型 /// </summary> public string TerminalType { get; set; } /// <summary> /// 使用状态 /// </summary> public UsingType UsingType { get; set; } /// <summary> /// 开户信息 /// </summary> public virtual OpenAccount Account { get; set; } }
/// <summary> /// Sim信息 /// </summary> [Table("S_SimInfo")] public class SimInfo : DbSetBase { /// <summary> /// 手机号 /// </summary> public string PhoneNo { get; set; } /// <summary> /// Sim卡号 /// </summary> public string SimNo { get; set; } /// <summary> /// 使用状态 /// </summary> public UsingType UsingType { get; set; } /// <summary> /// 开户信息 /// </summary> public virtual OpenAccount Account { get; set; } }
/// <summary> /// 开户信息 /// </summary> [Table("OpenAccount")] public class OpenAccount : DbSetBase { /// <summary> /// 终端信息 /// </summary> public virtual TerminalInfo Terminal { get; set; } /// <summary> /// 车辆信息 /// </summary> public virtual VehicleInfo Vehicle { get; set; } /// <summary> /// Sim信息 /// </summary> public virtual SimInfo Sim { get; set; } /// <summary> /// 注册时间 /// </summary> public DateTime? RegisterTime { get; set; } /// <summary> /// 是否注册 /// </summary> public bool? IsRegister { get; set; } } }
,在通过 Fluent Api设计其对应关系:
modelBuilder.Entity<OpenAccount>().HasRequired(a => a.Vehicle).WithOptional(b => b.Account).Map(m => m.MapKey("VehicleId")); modelBuilder.Entity<OpenAccount>().HasRequired(a => a.Sim).WithOptional(b => b.Account).Map(m => m.MapKey("SimId")); modelBuilder.Entity<OpenAccount>().HasRequired(a => a.Terminal).WithOptional(b => b.Account).Map(m => m.MapKey("TerminalId"));
这样三种对象的对应关系就完成了,开户信息表就是作为一种视图来呈现三种对象的对应。
标签:style blog color io 使用 ar for strong 数据
原文地址:http://www.cnblogs.com/songjingsong/p/4010722.html