Entity framework 两种截然不同的关联，而不是一种

我有两个相关实体（我添加了所有可能的数据注释，但ODataConventionModelBuilder似乎忽略了它们）：

公开课考试
{
[反向属性（“检查”）]
公共虚拟ICollection变量{get；set；}
}
公共抽象类变量
{
[必需]
公共int？检查ID{get；set；}
[必需]
[外键（“检查ID”）]
[逆属性（“变量”）]
公共虚拟考试{get；set；}
}

下面是一个OData模型生成（似乎HasMany（）和HasRequired（）不会影响结果模型）：

var modelBuilder=new ODataConventionModelBuilder（）；
modelBuilder.EntitySet（“检查”）；
modelBuilder.EntitySet（“变量”）；
modelBuilder.Entity（）有许多（e=>e.Variables）；
modelBuilder.Entity（）.HasRequired（v=>v.examice）；
返回modelBuilder.GetEdmModel（）；

结果模型：

        var modelBuilder = new ODataConventionModelBuilder();
        modelBuilder.EntitySet<Examination>("Examinations");
        modelBuilder.EntitySet<Variable>("Variables");

        modelBuilder.Entity<Examination>().HasMany(e => e.Variables);
        modelBuilder.Entity<Variable>().HasRequired(v => v.Examination);

        return modelBuilder.GetEdmModel();

<EntityType Name="Examination">
  <NavigationProperty Name="Variables" Relationship="YoStat.Models.YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner" ToRole="Variables" FromRole="VariablesPartner"/>
</EntityType>
<EntityType Name="Variable" Abstract="true">
  <NavigationProperty Name="Examination" Relationship="YoStat.Models.YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner" ToRole="Examination" FromRole="ExaminationPartner"/>
</EntityType>

<Association Name="YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner">
  <End Type="YoStat.Models.Variable" Role="Variables" Multiplicity="*"/>
  <End Type="YoStat.Models.Examination" Role="VariablesPartner" Multiplicity="0..1"/>
</Association>
<Association Name="YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner">
  <End Type="YoStat.Models.Examination" Role="Examination" Multiplicity="1"/>
  <End Type="YoStat.Models.Variable" Role="ExaminationPartner" Multiplicity="0..1"/>
</Association>

<EntityContainer Name="Container">
  <EntitySet Name="Examinations" EntityType="YoStat.Models.Examination"/>
  <EntitySet Name="Variables" EntityType="YoStat.Models.Variable"/>
  <AssociationSet Name="YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartnerSet" Association="YoStat.Models.YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner">
    <End Role="VariablesPartner" EntitySet="Examinations"/>
    <End Role="Variables" EntitySet="Variables"/>
  </AssociationSet>
  <AssociationSet Name="YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartnerSet" Association="YoStat.Models.YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner">
    <End Role="ExaminationPartner" EntitySet="Variables"/>
    <End Role="Examination" EntitySet="Examinations"/>
  </AssociationSet>
</EntityContainer>

---

如您所见，它生成两个不同的关联，而不是一个。如何修复它？谢谢

这看起来像odata model builder中的一个bug，odata model builder总是为每个导航属性创建单向导航，而更好的方法是先查看模型以检查它是否是双向导航。我将此错误提交到：

然而，我并没有发现客户端当前行为有任何缺陷。WCF DS客户端仍将生成正确的代理类。您是否有任何特定的用户场景被其阻止？这些信息将有助于更好地对bug进行分类。谢谢

<EntityType Name="Examination">
  <NavigationProperty Name="Variables" Relationship="YoStat.Models.YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner" ToRole="Variables" FromRole="VariablesPartner"/>
</EntityType>
<EntityType Name="Variable" Abstract="true">
  <NavigationProperty Name="Examination" Relationship="YoStat.Models.YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner" ToRole="Examination" FromRole="ExaminationPartner"/>
</EntityType>

<Association Name="YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner">
  <End Type="YoStat.Models.Variable" Role="Variables" Multiplicity="*"/>
  <End Type="YoStat.Models.Examination" Role="VariablesPartner" Multiplicity="0..1"/>
</Association>
<Association Name="YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner">
  <End Type="YoStat.Models.Examination" Role="Examination" Multiplicity="1"/>
  <End Type="YoStat.Models.Variable" Role="ExaminationPartner" Multiplicity="0..1"/>
</Association>

<EntityContainer Name="Container">
  <EntitySet Name="Examinations" EntityType="YoStat.Models.Examination"/>
  <EntitySet Name="Variables" EntityType="YoStat.Models.Variable"/>
  <AssociationSet Name="YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartnerSet" Association="YoStat.Models.YoStat_Models_Examination_Variables_YoStat_Models_Variable_VariablesPartner">
    <End Role="VariablesPartner" EntitySet="Examinations"/>
    <End Role="Variables" EntitySet="Variables"/>
  </AssociationSet>
  <AssociationSet Name="YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartnerSet" Association="YoStat.Models.YoStat_Models_Variable_Examination_YoStat_Models_Examination_ExaminationPartner">
    <End Role="ExaminationPartner" EntitySet="Variables"/>
    <End Role="Examination" EntitySet="Examinations"/>
  </AssociationSet>
</EntityContainer>