我正在尝试使用 SQLite.Net 和 SQLiteNetExtensions 设置 SQLite 数据库。我似乎无法在数据库中创建外键。我已删除所有表并使用模型类重新创建它们。我已经检查了 SQLite 管理器中的编译指示并打开了外键。在我的示例中,一个地块可以有许多树。关于我可能缺少什么的任何建议?
public class Tree
{
[PrimaryKey, AutoIncrement]
public int TreeId { get; set; }
[NotNull]
public int TreeNumber { get; set; }
[NotNull]
public double Dbhob { get; set; }
public double? Height { get; set; }
[NotNull,Default(value: false)]
public bool? HeightTree { get; set; }
public string QualityCode { get; set; }
[ForeignKey(typeof(Plot))]
public int PlotId { get; set; }
[ManyToOne]
public Plot PlotInverse { get; set; }
}
public class Plot
{
[PrimaryKey, AutoIncrement]
public int PlotId { get; set; }
[NotNull, Unique]
public System.Guid PlotGuid { get; set; }
[NotNull, MaxLength(60)]
public string Strata { get; set; }
[NotNull, MaxLength(60)]
public string PlotNumber { get; set; }
public DateTime MeasureDate { get; set; }
[MaxLength(70)]
public String AssessorLead { get; set; }
[MaxLength(60)]
public String AssessorCrew { get; set; }
[Default(value: 0)]
public double PlotArea { get; set; }
public double BasalArea { get; set; }
[OneToMany("PlotId","PlotId")]
public List<Tree> Trees { get; set; }
}