c# - 如何对2个子实体进行分组并获得这两个子实体的总数？

我想获取为我的Test Version 0即Test Id=100运行的总变体

这是我的表和记录：

测试：

Id      Version
100        0

变体：

Id      Name       Type   CategoryId
11      Variant1   Diff     2
12      Variant1   Add      2
13      Variant2   Add      3
14      Variant2   Diff     2
15      Variant3   Add      6

子变量：

Id     VariantId     Name
66      11           Abc
67      11           PQR
68      11           Xyz

69      12           Abc
70      12           PQR
71      12           Xyz

72      13           Abc
73      13           PQR

74      14           Abc
75      14           PQR
76      14           Xyz

77      15           ABC
78      15           PQR

测试操作：

Id   TestId    SourceSubVariantId   TargetSubVariantId   variation
1     100       69                    70                   0
1     100       70                    71                   20
1     100       72                    73                   90

TestOperationDifference：

Id   TestId    SourceSubVariantId   TargetSubVariantId   Unmatch
1     100       66                    67                   0
1     100       67                    68                   2
1     100       74                    75                   7
1     100       75                    76                   0
1     100       77                    78                   26

因此，从以上记录中可以看出，总共有3种变体在2种类型的操作上运行，即TestOperation和TestOperationDifference，以下是特定Test 100的3种变体：

Variants1(This run in TestOperation)
Variants2(This run in TestOperation)
Variants3(This run in TestOperationDifference)

这3个以上的父子变量的出现是因为所有这些父子变量都在2个表中使用，即TestOperation和TestOperationDifference。

因此，为了查找总的父变体，我需要从两个表（TestOperation和TestOperationDifference）中找出对应的子变体，并根据该子变体进行count total parent variants的查找。

这是我的课：

public class Test
        {
            public int Id { get; set; }
            public string Version { get; set; }
            public virtual ICollection<TestOperation> TestOperation { get; set; }
            public virtual ICollection<TestOperationDifference> TestOperationDifference { get; set; }
        }

        public class TestOperation
        {
            public int Id { get; set; }
            public Nullable<int> TestId { get; set; }
            public int SourceSubVariantId { get; set; }
            public int TargetSubVariantId { get; set; }
            public int  variation { get; set; }
            public virtual SubVariants SubVariants { get; set; }
            public virtual SubVariants SubVariants1 { get; set; }
            public virtual Test Test { get; set; }

        }

        public class TestOperationDifference
        {
            public int Id { get; set; }
            public Nullable<int> TestId { get; set; }
            public int SourceSubVariantId { get; set; }
            public int TargetSubVariantId { get; set; }

            public int unmatch { get; set; }

            public virtual SubVariants SubVariants { get; set; }
            public virtual SubVariants SubVariants1 { get; set; }
            public virtual Test Test { get; set; }
        }

        public class Variants
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public string Type { get; set; }
            public int CategoryId { get; set; }

            public virtual ICollection<SubVariants> SubVariants { get; set; }

            public virtual Category Category { get; set; }
        }

        public class SubVariants
        {
            public int Id { get; set; }
            public int VariantId { get; set; }
            public string Name { get; set; }

            public virtual Variants Variants { get; set; }
            public virtual ICollection<TestOperationDifference> TestOperationDifference { get; set; }

            public virtual ICollection<TestOperationDifference> TestOperationDifference1 { get; set; }
            public virtual ICollection<TestOperation> TestOperation { get; set; }
            public virtual ICollection<TestOperation> TestOperation1 { get; set; }
        }

我的查询：

var data =(from mk in context.Test
                  select new
                  {

                      TotalVariants = (mk.TestOperation.Select(t => t.SubVariants).Count()
                                   +
                                      mk.TestOperationDifference.Select(t => t.SubVariants).Count())
                    }).ToList();

输出：8

预期产量：3

最佳答案

更新资料

好学习，这是一个解决方案。

var tot_variants_for_test =
    (from v_name in
       (from t_op in test
        select new { v_name = t_op.TestOperation.Select(sv => sv.SubVariants.Variants.Name) }
       ).First().v_name
     select v_name)
    .Union(
    (from v_name in
      (from t_opdf in test
       select new { v_name = t_opdf.TestOperationDifference.Select(sv => sv.SubVariants.Variants.Name) }
     ).First().v_name
     select v_name))
   .Count();