我有一个实体拥有另一个实体
public class Entity1
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public virtual int ID { get; set; }
public string Property { get; set; }
public Entity2 Description { get; set; }
}
public class Entity2
{
public string Test { get; set; }
}
我需要在 Entity1.Property 和 Entity2.Test 上创建索引。配置是这样的
builder.OwnsOne(pt => pt.Description);
builder.HasIndex(p => new { p.Property, p.Description.Test }).IsUnique();
//builder.HasIndex("Property", "Description_Test").IsUnique();
我尝试了上面的两个代码,但它们不起作用。第一个说
The properties expression 'p => new <>f__AnonymousType3`7(Property = p.DeviceClassId,
Test = p.Description.Test)' is not valid. The expression should represent a property
access: 't => t.MyProperty'. When specifying multiple properties use an anonymous type:
't => new { t.MyProperty1, t.MyProperty2 }'.
Parameter name: propertyAccessExpression
第二个说:
The property 'Description_test' cannot be added to the type 'Entity1' because there was no
property type specified and there is no corresponding CLR property or field. To add a
shadow state property the property type must be specified.
是否可以在不手动修改迁移的情况下实现这一目标?
显然 EF Core 还不支持此功能。
在 GitHub 上查看此问题:https://github.com/aspnet/EntityFrameworkCore/issues/11336
还提供了一种解决方法,我自己尚未测试过。
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