我试图在EF 4.3中创建这三个模型：
- Family
- Guid FamilyId
- ICollection< Person> Members
- Company
- Guid CompanyId
- ICollection< Person> Employees
- Person
- Guid PersonId
- String Name
A person can belong to multiple families and multiple companies, as well as doesn't belong to any.
运行代码后，数据库中的映射似乎有点奇怪。未映射家庭成员和公司 - 员工。此外，Persons表中有四列：PersonId，Name，Family_FamilyId和Company_CompanyId。
我认为我的代码意味着一个人将永远属于1个家庭和1个公司。我该如何更改代码？
答案 0 :(得分：1)
您不能在课程中表达所有这些信息。要添加额外信息，您可以选择几个选项。
您可以将其添加到您的EF上下文类
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
//All people must belong to a family.
modelBuilder.Entity<Family>().HasMany(x => x.Members)
.WithRequired();
//Each person may belong to ZERO-Many companies.
modelBuilder.Entity<Company>().HasMany(x => x.Employees)
.WithMany();
}
或者这是你的EF上下文类
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Configurations.Add(new ComapnyMapper());
modelBuilder.Configurations.Add(new FamilyMapper());
}
public class FamilyMapper : EntityTypeConfiguration<Family>
{
public FamilyMapper()
{
HasMany(x => x.Members)
.WithRequired();
}
}
public class CompanyMapper : EntityTypeConfiguration<Company>
{
public CompanyMapper()
{
HasMany(x => x.Employees)
.WithMany();
}
}
答案 1 :(得分：0)
我最终将模型类更改为