我正在尝试使用Entity Framework进行关系查询，但不确定如何使用ICollection

Question

我正在尝试使用Entity Framework获取某些数据；我的模型具有projectconfig，它与units表具有一对多的关系，unitpaypoints的一对多关系，paypoint的一对多，tradephase表的关系是多对一。

我有一个ICollection的单位，从projectconfig，一个ICollection的单位支付点到单位支付点，支付点是unitpaypoint贸易阶段的对象，是支付点类中的对象。

我基本上是在Entity Framework中尝试执行此select语句。

var enumerable = DataServiceLocator.GetKPMProjectConfig_DAO().GetProjectConfigsByProjectID(project_id, Context).Select(x => new PMRUnitTypeModel
            {
                Project_ID = x.ProjectID,
                Trade = x.KPMUnits.Any(a => a.ProjectConfigID == x.ProjectConfigI)
            })

这似乎不正确，我只是不确定如何使用ICollection来获取所有相关数据，谢谢您的建议

select distinct 
    pc.ProjectID, tp.Service_Type, up.SubpayAmount, up.Amount 
from 
    [KPM].ProjectConfig pc
join
    KPM.Units u on pc.ProjectConfigID = u.ProjectConfigID
join 
    KPM.UnitPaypoints up on up.UnitID = u.UnitID
join 
    KPM.Paypoint p on p.PaypointID = up.PaypointID
join 
    TradePhase tp on p.TP_ID = tp.TP_ID
where 
    pc.projectid = 121

这些是我的课程对象

namespace KmsApi.KPMMOdels
{
    [Table("ProjectConfig", Schema = "KPM")]
    public partial class ProjectConfig
    {
        public ProjectConfig()
        {
            Units = new HashSet<Unit>();
        }

        [Column("ProjectConfigID")]
        public int ProjectConfigId { get; set; }
        [Column("FloorID")]
        public int? FloorId { get; set; }
        [Column("WingID")]
        public int? WingId { get; set; }
        [Column("BuildingID")]
        public int? BuildingId { get; set; }
        [Column("ComplexID")]
        public int? ComplexId { get; set; }
        [Column("ProjectID")]
        public int ProjectId { get; set; }
        public int? FloorOrder { get; set; }

        [ForeignKey("BuildingId")]
        [InverseProperty("ProjectConfigs")]
        public Building Building { get; set; }
        [ForeignKey("ComplexId")]
        [InverseProperty("ProjectConfigs")]
        public Complex Complex { get; set; }
        [ForeignKey("FloorId")]
        [InverseProperty("ProjectConfigs")]
        public Floor Floor { get; set; }
        [ForeignKey("ProjectId")]
        [InverseProperty("ProjectConfigs")]
        public Project Project { get; set; }
        [ForeignKey("WingId")]
        [InverseProperty("ProjectConfigs")]
        public Wing Wing { get; set; }
        [InverseProperty("ProjectConfig")]
        public ICollection<Unit> Units { get; set; }
    }
}

namespace KmsApi.KPMMOdels
{
    [Table("Units", Schema = "KPM")]
    public partial class Unit
    {
        public Unit()
        {
            CustomItem1 = new HashSet<CustomItem1>();
            UnitKnownA = new HashSet<UnitKnownA>();
            UnitPaypoints = new HashSet<UnitPaypoint>();
        }

        [Column("UnitID")]
        public int UnitId { get; set; }
        [Column("ProjectConfigID")]
        public int ProjectConfigId { get; set; }
        [Column("Unit")]
        public short Unit1 { get; set; }
        [StringLength(10)]
        public string UnitCode { get; set; }
        [Column("UnitTypeID")]
        public int UnitTypeId { get; set; }

        [ForeignKey("ProjectConfigId")]
        [InverseProperty("Units")]
        public ProjectConfig ProjectConfig { get; set; }
        [ForeignKey("UnitTypeId")]
        [InverseProperty("Units")]
        public UnitType UnitType { get; set; }
        [InverseProperty("Unit")]
        public ICollection<CustomItem1> CustomItem1 { get; set; }
        [InverseProperty("Unit")]
        public ICollection<UnitKnownA> UnitKnownA { get; set; }
        [InverseProperty("Unit")]
        public ICollection<UnitPaypoint> UnitPaypoints { get; set; }
    }
}

namespace KmsApi.KPMMOdels
{
    [Table("UnitPaypoints", Schema = "KPM")]
    public partial class UnitPaypoint
    {
        public UnitPaypoint()
        {
            UnitPaypointDetails = new HashSet<UnitPaypointDetail>();
            UnitPaypointOverrideVendors = new HashSet<UnitPaypointOverrideVendor>();
        }

        [Column("UnitPaypointID")]
        public int UnitPaypointId { get; set; }
        [Column("UnitID")]
        public int UnitId { get; set; }
        [Column("PaypointID")]
        public int PaypointId { get; set; }
        [Column(TypeName = "decimal(10, 2)")]
        public decimal Amount { get; set; }
        public bool Billable { get; set; }
        [Column(TypeName = "decimal(10, 2)")]
        public decimal? SubpayAmount { get; set; }

        [ForeignKey("PaypointId")]
        [InverseProperty("UnitPaypoints")]
        public Paypoint Paypoint { get; set; }
        [ForeignKey("UnitId")]
        [InverseProperty("UnitPaypoints")]
        public Unit Unit { get; set; }
        [InverseProperty("UnitPaypoint")]
        public ICollection<UnitPaypointDetail> UnitPaypointDetails { get; set; }
        [InverseProperty("UnitPaypoint")]
        public ICollection<UnitPaypointOverrideVendor> UnitPaypointOverrideVendors { get; set; }
    }
}

namespace KmsApi.KPMMOdels
{
    [Table("Paypoint", Schema = "KPM")]
    public partial class Paypoint
    {
        public Paypoint()
        {
            UnitPaypoints = new HashSet<UnitPaypoint>();
        }

        [Column("PaypointID")]
        public int PaypointId { get; set; }
        [Required]
        [StringLength(50)]
        public string Code { get; set; }
        [Required]
        [StringLength(255)]
        public string Description { get; set; }
        [Column("TP_ID")]
        public int TpId { get; set; }

        [InverseProperty("Paypoint")]
        public ICollection<UnitPaypoint> UnitPaypoints { get; set; }
    }
}