实体框架正在寻找一个关联的原则结束，它不应该

Question

我确实使用UOW和存储库以及所有pocos等来启动IOC（Ninject）。但是在我的“获取”问题之后我认为我会退后一步并快速进行POC工作

所以我正在做的每一件事我只想和这个“技巧”poco谈谈

private DataContext _db = new DataContext();

调用导致错误的方法

public List<Skill> GetAllSkills()
{

   var query = (from s in _db.Skills
                     select s).ToList();


   return query;
}

DbContext

public DbSet<Skill> Skills { get; set; } 

自动生成的poco（ado.net向导）

public partial class Skill
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Skill()
    {
        InternSkills = new HashSet<InternSkill>();
        Projects = new HashSet<Project>();
    }

    public int Skillid { get; set; }

    [StringLength(50)]
    public string SkillName { get; set; }

    [StringLength(2500)]
    public string SkillDesc { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<InternSkill> InternSkills { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Project> Projects { get; set; }
}

我的错误

{“无法确定类型'PublicHealth.Intern.DataAccess.Data.Entities.AssignmentTime'和'PublicHealth.Intern.DataAccess.Data.Entities.Assignment'之间关联的主要结尾。此主要结束必须使用关系流畅API或数据注释显式配置关联。“}

更新

我在Skill poco中看到了Project的poco

public virtual ICollection<Project> Projects { get; set; }

Project poco的代码

public partial class Project
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Project()
    {
        Assignments = new HashSet<Assignment>();
        ProjectInternTimes = new HashSet<ProjectInternTime>();
        Skills = new HashSet<Skill>();
    }

    public int ProjectId { get; set; }

    public int? StatusId { get; set; }

    public int? OfficeId { get; set; }

    [StringLength(100)]
    public string ContactNameLast { get; set; }

    [StringLength(100)]
    public string ContactNameFirst { get; set; }

    [StringLength(100)]
    public string ContactEmail { get; set; }

    [StringLength(25)]
    public string ContactPhone { get; set; }

    [StringLength(2500)]
    public string ProjectName { get; set; }

    [Column(TypeName = "text")]
    public string ProjectDesc { get; set; }

    public bool? IsDateSpecific { get; set; }

    [Column(TypeName = "date")]
    public DateTime? DateStart { get; set; }

    [Column(TypeName = "date")]
    public DateTime? DateEnd { get; set; }

    public int? EstimatedWeeks { get; set; }

    public DateTime? DateRequested { get; set; }

    public int? JobTitleId { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Assignment> Assignments { get; set; }

    public virtual JobTitle JobTitle { get; set; }

    public virtual Office Office { get; set; }

    public virtual Status Status { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<ProjectInternTime> ProjectInternTimes { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Skill> Skills { get; set; }
  }
}