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获取以下错误：数据库迁移与EF6和.NET中获取多个错误4.6.1
“验证失败的一个或多个实体参见‘EntityValidationErrors’属性的更多详细信息。”在Configuration.cs的89线
89号线是一个简单的context.SaveChanges();，在类文件的末尾：
namespace Model.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
internal sealed class Configuration : DbMigrationsConfiguration<Model.ApplicationDbContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
}
protected override void Seed(ApplicationDbContext context)
{
SeedData.AdditionalSeed _AdditionalSeed = new SeedData.AdditionalSeed();
_AdditionalSeed.Seed_StateOrProvince(context);
_AdditionalSeed.Seed_CountryOrRegion(context);
_AdditionalSeed.Seed_ContactTypes(context);
_AdditionalSeed.Seed_CurrencyCodes(context);
_AdditionalSeed.Seed_Preferences_CalendarSettings_CalendarView(context);
_AdditionalSeed.Seed_Preferences_CalendarSettings_WeeklyView(context);
_AdditionalSeed.Seed_Preferences_CalendarSettings_WhatToShow(context);
_AdditionalSeed.Seed_Preferences_Calendar_FuturePastSettings(context);
_AdditionalSeed.Seed_Preferences_ItemsAndInventory_AdvancedInventory_Barcodes_CopyBarcodeFrom(context);
_AdditionalSeed.Seed_Preferences_ItemsAndInventory_UnitOfMeasureType(context);
_AdditionalSeed.Seed_Preferences_PayrollEmployees_EmployeeDefaults_PayFrequency(context);
_AdditionalSeed.Seed_Preferences_PayrollEmployees_EmployeeDefaults_SickAndVacationDefaults_AccuralPeriod(context);
_AdditionalSeed.Seed_Preferences_PayrollEmployees_EmployeeDefaults_Taxes_FilingStatus(context);
_AdditionalSeed.Seed_Preferences_ReportsAndGraphs_ReportPreferences_DatePreparedFormat(context);
_AdditionalSeed.Seed_Preferences_ReportsAndGraphs_ReportPreferences_PageNumberFormat(context);
_AdditionalSeed.Seed_Preferences_ReportsAndGraphs_ReportPreferences_PageLayout(context);
_AdditionalSeed.Seed_Preferences_SalesAndCustomers_InvoicePackingSlip(context);
_AdditionalSeed.Seed_Preferences_SalesAndCustomers_RoundingRules(context);
_AdditionalSeed.Seed_Preferences_SalesAndCustomers_Shippers(context);
_AdditionalSeed.Seed_Preferences_SalesTax_Intervals(context);
_AdditionalSeed.Seed_Preferences_SalesTax_SalesTaxCode(context);
_AdditionalSeed.Seed_Preferences_SendForms_SendMethod(context);
_AdditionalSeed.Seed_Preferences_SendForms_DeliveryMethod(context);
_AdditionalSeed.Seed_Preferences_SendForms_EmailTemplateCategoryList(context);
_AdditionalSeed.Seed_Preferences_TimeAndExpenses_WorkWeek(context);
_AdditionalSeed.Seed_Security_RoleMaster(context);
context.SaveChanges();
_AdditionalSeed.Seed_Security_AccountingRole(context);
_AdditionalSeed.Seed_Security_BankingRole(context);
_AdditionalSeed.Seed_Security_CentersRole(context);
_AdditionalSeed.Seed_Security_CompanyRole(context);
_AdditionalSeed.Seed_Security_CustomerAndReceivablesRole(context);
_AdditionalSeed.Seed_Security_EmployeesAndPayrollRole(context);
_AdditionalSeed.Seed_Security_FileRole(context);
_AdditionalSeed.Seed_Security_ListsRole(context);
_AdditionalSeed.Seed_Security_ReportsRole(context);
_AdditionalSeed.Seed_Security_SiteSettingsRole(context);
_AdditionalSeed.Seed_Security_TimeTrackingRole(context);
_AdditionalSeed.Seed_Security_VendorsAndPayablesRole(context);
_AdditionalSeed.Seed_TaxesFilingStatus(context);
_AdditionalSeed.Seed_EmploymentType(context);
_AdditionalSeed.Seed_EmployeeEmergencyContactType(context);
_AdditionalSeed.Seed_EmployeeEthnicity(context);
_AdditionalSeed.Seed_EmployeeMaritalStatus(context);
_AdditionalSeed.Seed_Salutations(context);
_AdditionalSeed.Seed_DefaultUnitUsedForTypes(context);
_AdditionalSeed.Seed_UnitOfMeasureDefaultType(context);
context.SaveChanges();
_AdditionalSeed.Seed_UnitOfMeasureDefaultBaseUnits(context);
context.SaveChanges();
_AdditionalSeed.Seed_UnitOfMeasureDefaultRelatedUnits(context);
context.SaveChanges();
_AdditionalSeed.Seed_Terms(context);
_AdditionalSeed.Seed_TaxForms(context);
context.SaveChanges();
_AdditionalSeed.Seed_TaxFormDetail(context);
_AdditionalSeed.Seed_AccountTypes(context);
context.SaveChanges();
_AdditionalSeed.Seed_Industries(context);
context.SaveChanges();
_AdditionalSeed.Seed_OrganizationTypes(context);
context.SaveChanges();
}
}
}
当我注释此行了，然后我得到以下错误：
“序列包含多于一个元件”在TaxFormDetail.cs的线12
这个类文件中的代码是1200线，所以我将只提供唯一的行：
namespace Model.Migrations.SeedData
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
public partial class AdditionalSeed
{
public void Seed_TaxFormDetail(ApplicationDbContext context)
{
context.TaxFormDetail.AddOrUpdate(
r => new { r.TaxFormID, r.TaxCodeLineDescription },
new TaxFormDetailModel() { TaxCodeLineNumber = null, TaxCodeLineDescription = "Schedule F: Interest expense, mortgage", TaxFormID = context.TaxForms.FirstOrDefault(r => r.TaxForm.Equals("1040")).RecordID },
.....
new TaxFormDetailModel() { TaxCodeLineNumber = null, TaxCodeLineDescription = "Pt I-Unrel Bus Inc: Sch C, L3-Inc-real/pers prop", TaxFormID = context.TaxForms.FirstOrDefault(r => r.TaxForm.Equals("990-T")).RecordID }
);
}
}
}
我给这台模型如下：
[Table(name: "TaxFormDetail")]
public class TaxFormDetailModel
{
[Key, Required, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid RecordID { get; set; }
public Guid TaxFormID { get; set; }
public string TaxCodeLineNumber { get; set; }
[MaxLength(255)]
public string TaxCodeLineDescription { get; set; }
}
我看过无数的谷歌和这些错误并没有什么SO结果帮助，除非我错过了一些东西。
编辑
我唯一的错误是因为这是由包管理器运行堆栈跟踪，还有就是我知道的越来越别的东西没有其他办法：
System.InvalidOperationException: Sequence contains more than one element
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2[TResult](IEnumerable`1 sequence)
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
at System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate)
at System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](DbSet`1 set, IEnumerable`1 identifyingProperties, InternalSet`1 internalSet, TEntity[] entities)
at System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](IDbSet`1 set, Expression`1 identifierExpression, TEntity[] entities)
at Model.Migrations.SeedData.AdditionalSeed.Seed_TaxFormDetail(ApplicationDbContext context) in Z:\_Profile Storage\Projects\Corporate.WEB\Model\Migrations\SeedData\TaxFormDetail.cs:line 12
at Model.Migrations.Configuration.Seed(ApplicationDbContext context) in Z:\_Profile Storage\Projects\Corporate.WEB\Model\Migrations\Configuration.cs:line 81
at System.Data.Entity.Migrations.DbMigrationsConfiguration`1.OnSeed(DbContext context)
at System.Data.Entity.Migrations.DbMigrator.SeedDatabase()
at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.SeedDatabase()
at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
at System.Data.Entity.Migrations.DbMigrator.<>c__DisplayClassc.<Update>b__b()
at System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
at System.Data.Entity.Migrations.Infrastructure.MigratorBase.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
at System.Data.Entity.Migrations.Infrastructure.MigratorBase.Update(String targetMigration)
at System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.Run()
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.AppDomain.DoCallBack(CrossAppDomainDelegate callBackDelegate)
at System.Data.Entity.Migrations.Design.ToolingFacade.Run(BaseRunner runner)
at System.Data.Entity.Migrations.Design.ToolingFacade.Update(String targetMigration, Boolean force)
at System.Data.Entity.Migrations.UpdateDatabaseCommand.<>c__DisplayClass2.<.ctor>b__0()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
Sequence contains more than one element
什么是内部异常？ http://www.c-sharpcorner.com/UploadFile/97fc7a/validation-failed-for-one-or-more-entities-mvcentity-frame/ –