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創建方法:收到錯誤:「一個指定的包含路徑是無效的的EntityType場」不聲明導航屬性」
public List<Field> GetScheduleDetails()
{
var schedulefields = DBcontextFactory.Context.Set<Field>).Include("ScheduleField").ToList();
}
使用以上方法我試圖獲取所有加盟(場。 fieldid = schedulefield.fieldid)來自兩個表的記錄。字段表與schedulefield表相關。對不起,如果我不熟悉技術術語。
場模型:
public partial class Field : DOIEntity
{
public Field()
{
this.FilerResponses = new HashSet<FilerResponse>();
this.ScheduleFields = new HashSet<ScheduleField>();
}
public int FieldId { get; set; }
public string FieldDisplayName { get; set; }
public int FieldTypeId { get; set; }
public string HelpText { get; set; }
public Nullable<bool> OtherTextAllowed { get; set; }
public Nullable<int> ChoiceGroupId { get; set; }
public virtual FieldType FieldType { get; set; }
public virtual ICollection<FilerResponse> FilerResponses { get; set; }
public virtual ICollection<ScheduleField> ScheduleFields { get; set; }
}
ScheduleField型號:
public partial class ScheduleField
{
[Key]
public int ScheduleId { get; set; }
public int FieldId { get; set; }
public byte SortOrder { get; set; }
public Nullable<bool> IsMandatory { get; set; }
public Nullable<int> ParentFieldId { get; set; }
public Nullable<int> ParentChoiceId { get; set; }
public virtual Field Field { get; set; }
public virtual Schedule Schedule { get; set; }
}
當我打電話的方法,我得到這個錯誤:
A specified Include path is not valid. The EntityType 'WorldBank.DOI.Data.Field' does not declare a navigation property with the name 'ScheduleField'.
爲什麼會出現這個錯誤?
你'Field'類沒有一個'ScheduleField'財產,而是它的一個集合聲明爲' ScheduleFields'。 –
如果我添加公共虛擬ScheduleField ScheduleField {get; set;}將問題解決? – user2181707
這取決於,你真的需要什麼? 'Field'中需要一個'ScheduleField'實例嗎?如果是,那麼你將如何處理'ScheduleField'的集合?或者,也許這就是你需要的:'DBcontextFactory.Context.Set().Include(「ScheduleFields」)' –