EF7在实体属性中使用NotMapped属性时添加迁移错误

本文关键字：属性 添加 迁移 错误 NotMapped 实体 EF7 | 更新日期: 2023-09-27 18:24:32

我无法在实体属性上使用[NotMapped]属性，因为migration-add命令在下面抛出一个错误；

这是我的POCO；

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace Domain.Entities
{
    public partial class Employer
    {
        public int EmployerId { get; set; }
        public bool? Blacklisted { get; set; }
        [NotMapped]
        public int TestProperty { get; set; }
    }
}

这是我收到的异常信息。

System.ArgumentNullException: Value cannot be null.
Parameter name: navigation
   at Microsoft.Data.Entity.Utilities.Check.NotNull[T](T value, String parameterName)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnNavigationAdded(InternalRelationshipBuilder relationshipBuilder, Navigation navigation)
   at Microsoft.Data.Entity.Metadata.Internal.InternalRelationshipBuilder.Relationship(InternalEntityTypeBuilder principalEntityTypeBuilder, InternalEntityTypeBuilder dependentEntityTypeBuilder, String navigationToPrincipalName, String navigationToDependentName, IReadOnlyList`1 dependentProperties, IReadOnlyList`1 principalProperties, Nullable`1 isUnique, Nullable`1 isRequired, Nullable`1 deleteBehavior, Boolean strictPrincipal, Boolean oldRelationshipInverted, String oldNavigationToPrincipalName, String oldNavigationToDependentName, ConfigurationSource configurationSource, Boolean runConventions)
   at Microsoft.Data.Entity.Metadata.Internal.InternalRelationshipBuilder.ReplaceForeignKey(InternalEntityTypeBuilder principalEntityTypeBuilder, InternalEntityTypeBuilder dependentEntityTypeBuilder, String navigationToPrincipalName, String navigationToDependentName, IReadOnlyList`1 dependentProperties, IReadOnlyList`1 principalProperties, Nullable`1 isUnique, Nullable`1 isRequired, Nullable`1 deleteBehavior, Boolean strictPrincipal, Boolean oldRelationshipInverted, ConfigurationSource configurationSource, Boolean runConventions)
   at Microsoft.Data.Entity.Metadata.Internal.InternalRelationshipBuilder.ReplaceForeignKey(ConfigurationSource configurationSource, InternalEntityTypeBuilder principalEntityTypeBuilder, InternalEntityTypeBuilder dependentEntityTypeBuilder, String navigationToPrincipalName, String navigationToDependentName, IReadOnlyList`1 dependentProperties, IReadOnlyList`1 principalProperties, Nullable`1 isUnique, Nullable`1 isRequired, Nullable`1 deleteBehavior, Boolean strictPrincipal, Boolean oldRelationshipInverted, Boolean runConventions)
   at Microsoft.Data.Entity.Metadata.Internal.InternalRelationshipBuilder.Navigations(String navigationToPrincipalName, String navigationToDependentName, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalEntityTypeBuilder.Navigations(InternalRelationshipBuilder relationship, String navigationToPrincipalName, String navigationToDependentName, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalEntityTypeBuilder.Relationship(InternalEntityTypeBuilder targetEntityTypeBuilder, PropertyInfo navigationToTarget, PropertyInfo inverseNavigation, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.RelationshipDiscoveryConvention.FindRelationshipCandidates(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.RelationshipDiscoveryConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.RelationshipDiscoveryConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, String ignoredMemberName)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeMemberIgnored(InternalEntityTypeBuilder entityTypeBuilder, String ignoredMemberName)
   at Microsoft.Data.Entity.Metadata.Internal.InternalEntityTypeBuilder.Ignore(String memberName, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NotMappedMemberAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.InversePropertyAttributeConvention.Apply(InternalEntityTypeBuilder entityTypeBuilder, PropertyInfo navigationPropertyInfo, InversePropertyAttribute attribute)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.NavigationAttributeEntityTypeConvention`1.Apply(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.OnEntityTypeAdded(InternalEntityTypeBuilder entityTypeBuilder)
   at Microsoft.Data.Entity.Metadata.Internal.MetadataDictionary`2.GetOrAdd(Func`1 getKey, Func`1 createKey, Func`2 createValue, Func`2 onNewKeyAdded, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Entity(Type type, ConfigurationSource configurationSource)
   at Microsoft.Data.Entity.ModelBuilder.Entity(Type type)
   at Microsoft.Data.Entity.Infrastructure.ModelSource.FindSets(ModelBuilder modelBuilder, DbContext context)
   at Microsoft.Data.Entity.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
   at Microsoft.Data.Entity.Infrastructure.ModelSource.<>c__DisplayClass8_0.<GetModel>b__0(Type k)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.Data.Entity.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
   at Microsoft.Data.Entity.Internal.DbContextServices.CreateModel()
   at Microsoft.Data.Entity.Internal.LazyRef`1.get_Value()
   at Microsoft.Data.Entity.Internal.DbContextServices.get_Model()
   at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c.<AddEntityFramework>b__0_5(IServiceProvider p)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.FactoryService.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass12_0.<RealizeService>b__0(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetService[T](IServiceProvider provider)
   at Microsoft.Data.Entity.Design.Internal.DesignTimeServicesBuilder.<>c__DisplayClass7_0.<ConfigureContextServices>b__8(IServiceProvider _)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.FactoryService.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.TransientCallSite.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.TransientCallSite.Invoke(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass12_0.<RealizeService>b__0(ServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.Data.Entity.Design.MigrationsOperations.AddMigration(String name, String outputDir, String contextType)
   at Microsoft.Data.Entity.Commands.Program.Executor.<>c__DisplayClass6_0.<AddMigration>b__0()
   at Microsoft.Data.Entity.Commands.Program.Executor.Execute(Action action)
Value cannot be null.
Parameter name: navigation

这些是我的包依赖项；

"dependencies": {
    "EntityFramework.Commands": "7.0.0-rc1-final",
    "EntityFramework.Core": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer.Design": "7.0.0-rc1-final",
    "EntityFramework.Relational": "7.0.0-rc1-final",
    "EntityFramework.Relational.Design": "7.0.0-rc1-final"
  },

知道为什么我不能在实体属性中的任何位置使用[NotMapped]属性吗？

更新：正如Don所建议的，使用Fluent api代替注释是可行的，但我仍然想使用注释。我的目标是将[NotMapped]属性添加到基本实体中，这样我就不必将其添加到子实体中。

这就是我正在努力实现的目标；

将基本Id属性映射到实体的主键，而不将Id列添加到数据库。

public class EntityBase
{
   [NotMapped]
   public virtual int Id{ get; set; }
}
//Auto generated POCO
public partial class MyEntity
{
   //The primary key
   public virtual int MyEntityId{ get; set; }
}
//Partial class that I modify the auto generated Poco
public partial class MyEntity : EntityBase
{
    public override int Id 
    {
     get { return MyEntityId; } 
     set { MyEntityId = value; }
     }
}

EF7在实体属性中使用NotMapped属性时添加迁移错误

尝试使用Fluent-API

modelBuilder.Entity<Employer>().Ignore(e => e.TestProperty);
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