任何人都知道如何使用EF Code First Fluent API实现此方案:
public class Referancial
{
// Identity
public int KeyID { get; set; }
public string Code { get; set; }
public virtual ICollection<Translation> Translations { get; set; }
}
public class Translation
{
// refer to Referancial.KeyID
public int KeyID { get; set; }
public int LanguageID { get; set; }
public string Label { get; set; }
}
感谢您的回复
答案 0 :(得分:1)
尝试使用其他型号,我认为它更适合您
public class Referancial
{
// Identity
public int KeyID { get; set; }
public string Code { get; set; }
public virtual ICollection<Translation> Translations { get; set; }
}
public class Translation
{
//Translation needs its own Key
public int ID { get; set; }
// reference directly the Referencial object instead of the ID
public Referencial Referencial { get; set; }
public int LanguageID { get; set; }
public string Label { get; set; }
}
配置模型
_modelBuilder.Entity<Referancial>().HasKey(r => r.KeyID);
_modelBuilder.Entity<Translation>().HasKey(t => t.ID);
_modelBuilder.Entity<Referancial>().HasMany(r => r.Translations).WithRequired(t => t.Referencial).WillCascadeOnDelete(true);
答案 1 :(得分:0)
//在模型创建上:
protected override void OnModelCreating(DbModelBuilder modelBuilder) {
// Person
modelBuilder.Entity<Person>().HasKey(e => e.PersonID)
.ToTable("Persons")
.Property(e => e.PersonID)
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
//Referancial
modelBuilder.Entity<Referancial>().HasKey(e => e.KeyID)
.ToTable("Referancials")
.Property(e => e.KeyID)
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
//Translation
modelBuilder.Entity<Translation>().ToTable("Translations")
.HasKey(e => e.KeyID)
.Property(e => e.KeyID)
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);
modelBuilder.Entity<Referancial>()
.HasOptional(e=>e.Translations)
.WithMany()
.HasForeignKey(e => e.KeyID);
base.OnModelCreating(modelBuilder);
}
但它给我一个错误:
在模型生成期间检测到一个或多个验证错误:
PersonSearch.Models.Referancial_Translations ::多重性与角色&Referancial_Translations_Target&#39; Referancial_Translations_Target&#39;中的参照约束冲突。在关系&Referancial_Translations&#39;。由于从属角色中的所有属性都是不可为空的,因此主要角色的多重性必须为“1”。 Referancial_Translations_Source :: Multiplicity在Role&Referancial_Translations_Source&#39;中无效。在关系&Referancial_Translations&#39;。由于“从属角色”是指关键属性,因此“从属角色”的多重性的上限必须为“&#39; 1”。