[英]Map one to many composite key Entity framework 5
i am mapping my entities but when i try to get just get back the entity but no the relationship example i have the entity called Medicamento who has many definitions but just get the properties of medicamento and no the relationship whit definitions. 我正在映射我的实体,但是当我试图回到实体而没有关系的例子时,我有一个名为Medicamento的实体,它有很多定义,但只是得到药剂的属性而没有关系白衣定义。
i my third table i have a composite key my code is: 我的第三个表我有一个复合键我的代码是:
MedicamentoMap MedicamentoMap
public class MedicamentoMap : EntityTypeConfiguration<Medicamento>
{
public MedicamentoMap()
{
// primaryKey
this.HasKey(m => m.Id);
// propiedades
this.ToTable("Medicamento");
this.Property(m => m.Id).HasColumnName("MedicamentoID");
this.Property(m => m.Descripcion).HasColumnName("Descripcion");
//Relaciones
this.HasMany(p => p.Presentaciones)
.WithMany()
.Map(m =>
{
m.ToTable("MedicamentoPresentacion")
m.MapLeftKey("MedicamentoID");
m.MapRightKey( "PresentacionID");
});
}
}
the entitie definition is: 权利定义是:
public PresentacionMap()
{
// primaryKey
this.HasKey(m => m.Id);
// propiedades
this.ToTable("Presentacion");
this.Property(m => m.Id).HasColumnName("PresentacionID");
this.Property(m => m.Descripcion).HasColumnName("Descripcion");
}
and finally the third entity is medicamentoPresentacion is: 最后第三个实体是药物现象,是:
public MedicamentoPresentacionMap()
{
// primaryKey
this.HasKey(i => new {i.MedicamentoID, i.PresentacionID});
this.Property(i => i.CodigodeBarras);
this.ToTable("MedicamentoPresentacion");
this.Property(i => i.MedicamentoID).HasColumnName("MedicamentoID");
this.Property(i => i.PresentacionID).HasColumnName("PresentacionID");
this.Property(i => i.CodigodeBarras).HasColumnName("CodigoBarras");
}
You can't have both the many-to-many definition ( HasMany...WithMany
) and a visible junction class in the class model ( MedicamentoPresentacion
). 您不能同时拥有多对多定义( HasMany...WithMany
)和类模型中的可见联结类( MedicamentoPresentacion
)。
You have to remove the many-to-many mapping, because your junction table is not a pure junction table (which is a table with nothing but two foreign keys). 您必须删除多对多映射,因为您的联结表不是纯联结表(这是一个只包含两个外键的表)。 Your junction class also contains a barcode (I think), so it has a meaning in the business domain and it should be part of the model. 您的联结类还包含条形码(我认为),因此它在业务领域具有意义,它应该是模型的一部分。
So remove the HasMany...WithMany
part and hang on to MedicamentoPresentacionMap
. 所以删除HasMany...WithMany
部分,并挂在MedicamentoPresentacionMap
。 Both Medicamento
and Presentacion
should have a collection property MedicamentoPresentacions
. Medicamento
和Presentacion
都应该有一个收集属性MedicamentoPresentacions
。 (Which makes this a 1-n-1 association). (这使得它成为1-n-1关联)。
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