[英]Updating Nested Objects in Entity Framework
recently I discover that EF doesn't update nested object. 最近,我发现EF不会更新嵌套对象。 For few days I try to figure out how to do this but unfortunately I'm stuck with this problem. 几天来,我试图弄清楚该如何做,但是不幸的是,我仍然坚持这个问题。
I have Object 我有对象
public class ProjectEntity : AuditableEntity<int>
{
public string CustumerCompany { get; set; }
public string CustomerRepresentative { get; set; }
public string ProjectTitle { get; set; }
public string WwsNumber { get; set; }
[ForeignKey("ParentProjectId")]
public virtual ProjectEntity ParentProject { get; set; }
public int? ParentProjectId { get; set; }
public virtual ICollection<ProjectServicesEntity> Service { get; set; }
}
Then Service object 然后服务对象
public class ProjectServicesEntity : AuditableEntity<int>
{
/// <summary>
/// Service Number
/// </summary>
public int Number { get; set; }
/// <summary>
/// Service Name
/// </summary>
public string Name { get; set; }
/// <summary>
/// Positions
/// </summary>
public virtual ICollection<ProjectPositionsEntity> Positions { get; set; }
[ForeignKey("ProjectId")]
public virtual ProjectEntity Project { get; set; }
public int ProjectId { get; set; }
}
and Positions object: 和排名对象:
public class ProjectPositionsEntity : AuditableEntity<int>
{
/// <summary>
/// Position number
/// </summary>
public int Number { get; set; }
/// <summary>
/// Position Name
/// </summary>
public string Name { get; set; }
/// <summary>
/// Organization Unit for position
/// </summary>
public virtual ICollection<ProjectsOutsourcedPositionEntity> OrganizationUnit { get; set; }
/// <summary>
/// Represents if position is outsourced
/// </summary>
public bool OutSource { get; set; }
/// <summary>
/// Comments for position
/// </summary>
public string Remarks { get; set; }
[ForeignKey("ServiceId")]
public virtual ProjectServicesEntity Service { get; set; }
public int ServiceId { get; set; }
}}
And my update method: 和我的更新方法:
public void Update(T entity)
{
DbContext.Entry(entity).State = EntityState.Modified;
DbContext.SaveChanges();
}
When have page were all data is represented and when I try to edit some data in Service's or in Position's it doesn't update. 当有页面时,所有数据都被表示,当我尝试在Service或Position中编辑一些数据时,它不会更新。 Anybody had this kind of problem ? 有人遇到这种问题吗?
Every example that I saw it was only with nested object that has 1 level deep but as you can see my object has 2 level nest. 我看到的每个示例都仅包含深度为1级的嵌套对象,但是如您所见,我的对象具有2级嵌套。
So I figure out how I can make this work. 因此,我想出了如何进行这项工作的方法。 In specific repository class I made few foreach
loops that set EntityState to modified. 在特定的存储库类中,我进行了一些将EntityState设置为Modifyed的foreach
循环。 By our business rules Project required to have Service and Position and OrganizationUnit for Position is optional so I check if it's not null. 根据我们的业务规则,要求具有“服务和职位”以及“职位的OrganizationUnit”的项目是可选的,因此我检查它是否不为null。 Here is my solution: 这是我的解决方案:
DbContext.Entry(entity).State = EntityState.Modified;
foreach (var service in entity.Service)
{
DbContext.Entry(service).State = EntityState.Modified;
foreach (var position in service.Positions)
{
DbContext.Entry(position).State = EntityState.Modified;
if (position.OrganizationUnit == null) continue;
foreach (var organizationUnit in position.OrganizationUnit)
{
DbContext.Entry(organizationUnit).State = EntityState.Modified;
}
}
}
DbContext.SaveChanges();
Now when I want to update my object on any level it will update in my DB. 现在,当我想在任何级别上更新对象时,它将在我的数据库中更新。
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