# 質問内容

[Microsoft Docs（Entity Framework > Azure Cosmos DB
プロバイダー）](https://docs.microsoft.com/ja-
jp/ef/core/providers/cosmos/?tabs=dotnet-core-
cli)を参考にし、ネストした構造のデータを挿入しようとしたところ、エラーが発生しました。

何が原因で発生したエラーなのかについて教えてください。

# 詳細

[Entity Framework Sample (Cosmos
DB)](https://github.com/dotnet/EntityFramework.Docs/tree/master/samples/core/Cosmos)
を参考にしつつ、Cosmos DBに以下のようなデータを入れたいと考えています。

```

    {
        "Id": 1,
        "id": "1",
        "Address": {
            "ShipsToCity": "London",
            "ShipsToStreet": "221 B Baker St"
            "Test": {
                "Name": "John Doe"
            }
        }
    }
    
```

そこで、下記のような変更を行いました。

```

    //StreetAddress.cs
    namespace Cosmos.ModelBuilding
    {
        #region StreetAddress
        public class StreetAddress
        {
            public string Street { get; set; }
            public string City { get; set; }
            public TestClass Test { get; set; }
        }
        #endregion
    
        public class TestClass
        {
            public string Name { get; set; }
        }
    }
    
```

```

    //OrderContext.cs
    namespace Cosmos.ModelBuilding
    {
        public class OrderContext : DbContext
        {
            ...
            protected override void OnModelCreating(ModelBuilder modelBuilder)
            {
                ...
    
                #region PropertyNames
                modelBuilder.Entity<Order>().OwnsOne(
                    o => o.ShippingAddress,
                    sa =>
                    {
                        sa.ToJsonProperty("Address");
                        sa.Property(p => p.Street).ToJsonProperty("ShipsToStreet");
                        sa.Property(p => p.City).ToJsonProperty("ShipsToCity");
                        sa.Property(p => p.Test).ToJsonProperty("PostCode");
                    });
                #endregion
    
                ...
            }
        }
    }
    
```

```

    // Sample.cs
    namespace Cosmos.ModelBuilding
    {
        public static class Sample
        {
            public static async Task Run()
            {
                ...
    
                using (var context = new OrderContext())
                {
                    await context.Database.EnsureDeletedAsync();
                    await context.Database.EnsureCreatedAsync();
    
                    context.Add(new Order
                    {
                        Id = 1,
                        ShippingAddress = new StreetAddress { City = "London", Street = "221 B Baker St", Test = new TestClass() { Name = "John Doe" } },
                        PartitionKey = "1"
                    });
    
                    await context.SaveChangesAsync();
                }
    
                ...
            }
        }
    }
    
```

上記を実行すると、以下のようなエラーとなります。

```

    System.InvalidOperationException
      HResult=0x80131509
      Message=The property 'Order.ShippingAddress#StreetAddress.Test' is of type 'TestClass' which is not supported by current database provider. Either change the property CLR type or ignore the property using the '[NotMapped]' attribute or by using 'EntityTypeBuilder.Ignore' in 'OnModelCreating'.
      Source=Microsoft.EntityFrameworkCore
      スタック トレース:
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.ValidatePropertyMapping(IModel model, IDiagnosticsLogger`1 logger)
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger)
       at Microsoft.EntityFrameworkCore.Cosmos.Internal.CosmosModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger)
       at Microsoft.EntityFrameworkCore.Metadata.Conventions.ValidatingConvention.ProcessModelFinalized(IConventionModelBuilder modelBuilder, IConventionContext`1 context)
       at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.ImmediateConventionScope.OnModelFinalized(IConventionModelBuilder modelBuilder)
       at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.OnModelFinalized(IConventionModelBuilder modelBuilder)
       at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FinalizeModel()
       at Microsoft.EntityFrameworkCore.ModelBuilder.FinalizeModel()
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
       at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
       at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
       at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder.<>c.<TryAddCoreServices>b__7_3(IServiceProvider p)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
       at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
       at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
       at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
       at Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
       at Microsoft.EntityFrameworkCore.DbContext.Microsoft.EntityFrameworkCore.Infrastructure.IInfrastructure<System.IServiceProvider>.get_Instance()
       at Microsoft.EntityFrameworkCore.Infrastructure.Internal.InfrastructureExtensions.GetService[TService](IInfrastructure`1 accessor)
       at Microsoft.EntityFrameworkCore.Infrastructure.AccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
       at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.get_Dependencies()
       at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.EnsureDeletedAsync(CancellationToken cancellationToken)
       at Cosmos.ModelBuilding.Sample.<Run>d__0.MoveNext() in C:\Users\ower\Desktop\EntityFramework.Docs-master\samples\core\Cosmos\ModelBuilding\Sample.cs:line 20
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
       at Cosmos.Program.<Main>d__0.MoveNext() in C:\Users\ower\Desktop\EntityFramework.Docs-master\samples\core\Cosmos\Program.cs:line 9
    
      この例外は、最初にこの呼び出し履歴 
        [外部コード]
        Cosmos.ModelBuilding.Sample.Run() (Sample.cs 内)
        [外部コード]
        Cosmos.Program.Main() (Program.cs 内) でスローされました
    
```

このエラーを解消したいのですが、エラー内容が何を言わんとしているのか理解できていません。  
そこで、下記2点を質問させてください。

  1. このエラーは何故発生するのでしょうか？
  2. エラーを解消するためのヒントがあれば教えてください

よろしくお願いいたします
CC BY-SA 4.0
2020-04-18T02:57:04.993
65728
2020-04-18T02:57:04.993
39689
question
c# .net database .net-core entity-framework
Entity Framework経由でCosmos DBにネストしたデータを入れたい