linq c#中的多选查询

Question

我有以下课程。

public class Candidate
{
    public long Id { get; set; )
    public List<JobAssigned> JobAssigned { get; set; }       
}

public class JobAssigned
{
    public long Id { get; set; }     
    public List<StageScore> StageScore { get; set; }
    public List<CriteriaScore> CriteriaScore { get; set; }
    public List<StageComment> StageComment { get; set; }       
}

public class StageComment
{
    public long Id { get; set; }
    public JobAssigned  JobAssigned { get; set; }
    public long JobAssignedId { get; set; }
    public long PipelineStageId { get; set; }
    public long CandidateId { get; set; }
    public long JobId { get; set; }
    public string Comment { get; set; }
}

public class StageScore
{
    public long Id { get; set; }
    public JobAssigned JobAssigned { get; set; }
    public long JobAssignedId { get; set; }
    public long Rating { get; set; }
    public long PipelineStageId { get; set; }
    public long CandidateId { get; set; }
    public long JobId { get; set; }
}

public class CriteriaScore
{
    public long Id { get; set; }
    public JobAssigned JobAssigned { get; set; }
    public long JobAssignedId { get; set; }
    public long Rating { get; set; }
    public long PipelineStageCriteriaId { get; set; }
    public long CandidateId { get; set; }
    public long JobId { get; set; }
}

我想一次性加载所有相关的表。我正在尝试以下操作，

List<Candidate> candidate = _context.Candidates.                
          Include(f => f.JobAssigned.Select(g => g.StageScore))
          .OrderBy(x => x.Id).ToList();

当我做.Select().Select() 时，它给出了一个错误。如何在单个查询中获取所有集合？

Answer 1

看看我写的this article，它动态加载所有对象。

以下是包含所有对象的方法。

我希望不会有圈子引用。

我在上面的url写的插件可以处理圆引用

List<Candidate> candidate = _context.Candidates.                
    Include(f => f.JobAssigned.Select(g => g.StageScore.Select(a=> a.JobAssigned))).
    Include(f => f.JobAssigned.Select(g => g.CriteriaScore.Select(a=> a.JobAssigned))).
    Include(f => f.JobAssigned.Select(g => g.StageComment.Select(a=> a.JobAssigned))).
    OrderBy(x => x.Id).ToList();