LINQ的包括不工作

Question

我有這樣的LINQ表達

ActionPlan 
    .Include(x => x.Goal) 
    .Include(x => x.Responsibles) 
    .Include(x => x.Goal.EducationalPlan) 
    .AsNoTracking() 
    .Where(x => x.State == State.Active && x.Goal.State == State.Active && x.Goal.EducationalPlan.State == State.Active) 
    .Where(x => x.Responsibles.Any(r => r.PersonId == pes_id)) 
    .Distinct() 
    .Select(x => x.Goal) 
    .ToList(); 

的包括EducationalPlan的是不工作的，爲什麼？所有其他工作都很規範， EducationPlan是一個對象而不是列表。

Answer 1

對於多層次的，你應該是這樣的：

ActionPlan 
    .Include(x => x.Goal) 
    .Include(x => x.Responsibles) 
    .Include(x => x.Goal.Select(y => y.EducationalPlan)) 
    .AsNoTracking() 
    .Where(x => x.State == State.Active && x.Goal.State == State.Active && x.Goal.EducationalPlan.State == State.Active) 
    .Where(x => x.Responsibles.Any(r => r.PersonId == pes_id)) 
    .Distinct() 
    .Select(x => x.Goal) 
    .ToList(); 

或者試試這個：

ActionPlan 
    .Include(x => x.Goal) 
    .Include(x => x.Responsibles) 
    .Include("Goal.EducationalPlan") 
    .AsNoTracking() 
    .Where(x => x.State == State.Active && x.Goal.State == State.Active && x.Goal.EducationalPlan.State == State.Active) 
    .Where(x => x.Responsibles.Any(r => r.PersonId == pes_id)) 
    .Distinct() 
    .Select(x => x.Goal) 
    .ToList();