Question

ASP.NET 4.61，EF 6.1.3
SQL Server 2012

我有以下POCO：

public class GdataHealthTableModel : AuditedEntity
{
    public GdataHealthTableModel()
    {
        PrevHealthAssessment = new HashSet<HealthPrevHealthAssessmentEnum>();
    }

    public HashSet<HealthPrevHealthAssessmentEnum> PrevHealthAssessment { get; set; }
}

但这不会为 PrevHealthAssessment 列生成迁移。那么，能够存储多个枚举成员以便EF“理解它”并生成迁移的正确构造是什么？

Answer 1

您可以添加新实体并为其命名，例如PrevHealthAssessment将HealthPrevHealthAssessmentEnum作为属性。

public class PrevHealthAssessment
{
    public int Id { get; set; }
    public HealthPrevHealthAssessmentEnum HealthPrevHealthAssessment { get; set; }

}

在GdataHealthTableModel中，添加新创建的实体的集合，如下所示：

public ICollection<PrevHealthAssessment> PrevHealthAssessments {get; set; }

Answer 2

您需要使用ICollection类型。

 public class GdataHealthTableModel : AuditedEntity
 {
   public GdataHealthTableModel()
    {
      PrevHealthAssessment = new HashSet<HealthPrevHealthAssessmentEnum>();
    }

   public ICollection<HealthPrevHealthAssessmentEnum> PrevHealthAssessment { get; set; }
 }

实体框架代码第一个HashSet不生成迁移代码

2 个答案: