[英]The entity type 'Configuration' requires a primary key to be defined
當我嘗試使用Add-Migration
我收到此錯誤:
實體類型“配置”需要定義主鍵。
現在,我知道實體需要鍵,它有一個,但到目前為止,簡單地用[Key]
裝飾一個屬性完成了工作,但它似乎不再如此。 所以我有以下實體:
public class Configuration
{
[Key, ForeignKey("Client")]
public int ClientId { get; set; }
public CommunicationType CommunicationType { get; set; }
public string CommunicationValue { get; set; }
public virtual Client Client { get; set; }
}
但經過一段時間的搜索后,我發現顯然EF7並不喜歡它違反的慣例,我需要將ClientId
重命名為ConfigurationId
,但這似乎對我的編碼約定是錯誤的。 我是否必須改變我的方式,或者無論如何都要繞過這個? 提前致謝。
編輯
這是Client
實體,是的,那里有一個Configuration
屬性
public class Client
{
[Key]
public int ClientId { get; set; }
public string Name { get; set; }
public virtual User User { get; set; }
public virtual List<Station> Stations { get; set; }
public Configuration Configuration { get; set; }
}
編輯
完整錯誤日志:
System.InvalidOperationException: The entity type 'Configuration' requires a primary key to be defined. in Microsoft.EntityFrameworkCore.Internal.ModelValidator.ShowError(String message) in Microsoft.EntityFrameworkCore.Internal.ModelValidator.EnsureNonNullPrimaryKeys(IModel model) in Microsoft.EntityFrameworkCore.Internal.ModelValidator.Validate(IModel model) in Microsoft.EntityFrameworkCore.Internal.RelationalModelValidator.Validate(IModel model) in Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator) in Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.c__DisplayClass14_0.b__0(Object k) in System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory) in Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator) in Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel() in Microsoft.EntityFrameworkCore.Internal.LazyRef`1.get_Value() in Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model() in Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServiceCollectionExtensions.c.b__0_6(IServiceProvider p) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactoryService(FactoryService factoryService, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceProvider.c__DisplayClass16_0.b__0(ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) in Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider) in Microsoft.EntityFrameworkCore.Design.Internal.DesignTimeServicesBuilder.c__DisplayClass6_0.b__9(IServiceProvider _) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactoryService(FactoryService factoryService, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) in Microsoft.Extensions.DependencyInjection.ServiceProvider.c__DisplayClass16_0.b__0(ServiceProvider provider) in Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) in Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) in Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) in Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType) in Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType) in Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.c__DisplayClass0_1.b__0() in Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.c__DisplayClass3_0`1.b__0() in Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action) The entity type 'Configuration' requires a primary key to be defined.
您是否嘗試將ForeignKey屬性移動到導航屬性?
public class Configuration
{
[Key]
public int ClientId { get; set; }
public CommunicationType CommunicationType { get; set; }
public string CommunicationValue { get; set; }
[ForeignKey("ClientId")]
public virtual Client Client { get; set; }
}
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