錯誤「操作失敗，因爲索引或統計信息的名稱X上表已經存在Ÿ

Question

我想部署一個網站Azure的Web應用程序 IDE：的Visual Studio 2015/U3

網站。 ：ASP.NET MVC 4網站，我嘗試使用發佈通過VS部署現場Azure的Web應用程序在瀏覽器

錯誤：

Server Error in '/' Application.

The operation failed because an index or statistics with name 'IX_OwnerId' already exists on table 'dbo.Auctions'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: The operation failed because an index or statistics with name 'IX_OwnerId' already exists on table 'dbo.Auctions'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

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堆棧跟蹤：

[SqlException (0x80131904): The operation failed because an index or statistics with name 'IX_OwnerId' already exists on table 'dbo.Auctions'.] 
    System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +2442634 
    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5766568 
    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +285 
    System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4162 
    System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite) +948 
    System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +286 
    System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +286 
    System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<NonQuery>b__0(DbCommand t, DbCommandInterceptionContext`1 c) +10 
    System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +72 
    System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext) +356 
    System.Data.Entity.Internal.InterceptableDbCommand.ExecuteNonQuery() +103 
    System.Data.Entity.Migrations.DbMigrator.ExecuteSql(MigrationStatement migrationStatement, DbConnection connection, DbTransaction transaction, DbInterceptionContext interceptionContext) +109 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsInternal(IEnumerable`1 migrationStatements, DbConnection connection, DbTransaction transaction, DbInterceptionContext interceptionContext) +83 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsWithinTransaction(IEnumerable`1 migrationStatements, DbTransaction transaction, DbInterceptionContext interceptionContext) +65 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsWithinNewTransaction(IEnumerable`1 migrationStatements, DbConnection connection, DbInterceptionContext interceptionContext) +155 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsInternal(IEnumerable`1 migrationStatements, DbConnection connection, DbInterceptionContext interceptionContext) +346 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsInternal(IEnumerable`1 migrationStatements, DbConnection connection) +509 
    System.Data.Entity.Migrations.<>c__DisplayClass30.<ExecuteStatements>b__2e() +19 
    System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +10 
    System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +189 
    System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation) +78 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatements(IEnumerable`1 migrationStatements, DbTransaction existingTransaction) +194 
    System.Data.Entity.Migrations.DbMigrator.ExecuteStatements(IEnumerable`1 migrationStatements) +7 
    System.Data.Entity.Migrations.DbMigrator.ExecuteOperations(String migrationId, VersionedModel targetModel, IEnumerable`1 operations, IEnumerable`1 systemOperations, Boolean downgrading, Boolean auto) +828 
    System.Data.Entity.Migrations.DbMigrator.AutoMigrate(String migrationId, VersionedModel sourceModel, VersionedModel targetModel, Boolean downgrading) +559 
    System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId) +403 
    System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration) +445 
    System.Data.Entity.Migrations.<>c__DisplayClassc.<Update>b__b() +13 
    System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +422 
    System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +78 
    System.Data.Entity.MigrateDatabaseToLatestVersion`2.InitializeDatabase(TContext context) +108 
    System.Data.Entity.Internal.<>c__DisplayClassf`1.<CreateInitializationAction>b__e() +76 
    System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +60 
    System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +357 
    System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c) +7 
    System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +110 
    System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +198 
    System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73 
    System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +28 
    System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +53 
    System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +15 
    System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +53 
    System.Linq.Enumerable.ToDictionary(IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer) +146 
    System.Linq.Enumerable.ToDictionary(IEnumerable`1 source, Func`2 keySelector) +89 
    OnlineAuction.Controllers.HomeController.Index(Int32 CategoryId, String SearchKeyword) in C:\Users\Chico\Desktop\DIPLOMA PROJECT\DIPLOMA PROJECT\Проект\задав вопрос о оунерАди\delete — копия\OnlineDonors\Controllers\HomeController.cs:26 
    lambda_method(Closure , ControllerBase , Object[]) +146 
    System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14 
    System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +182 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27 
    System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +28 
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32 
    System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +58 
    System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +225 
    System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +10 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34 
    System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +24 
    System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +99 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27 
    System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14 
    System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36 
    System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26 
    System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 
    System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25 
    System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50 
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28 
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121 
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155 

---

我看了這個帖子： Unhandled Exception after Upgrading to Entity Framework 4.3.1

我想對我的Auctions表中刪除重複。 這是我Auctions和Users表創作InitialCreate類Up()方法：

public partial class InitialCreate : DbMigration 
{ 
    public override void Up() 
    { 
     CreateTable(
      "dbo.Auctions", 
      c => new 
       { 
        Id = c.Long(nullable: false, identity: true), 
        Title = c.String(nullable: false, maxLength: 160), 
        Description = c.String(nullable: false), 
        CurrentPrice = c.Double(nullable: false), 
        StartTime = c.DateTime(nullable: false), 
        EndTime = c.DateTime(nullable: false), 
        OwnerId = c.Int(nullable: false), 
        WinningBidId = c.Int(), 
        CategoryId = c.Int(nullable: false), 
       }) 
      .PrimaryKey(t => t.Id) 
      .ForeignKey("dbo.Users", t => t.OwnerId) 
      .ForeignKey("dbo.Bids", t => t.WinningBidId) 
      .ForeignKey("dbo.Categories", t => t.CategoryId) 
      .Index(t => t.OwnerId) 
      .Index(t => t.WinningBidId) 
      .Index(t => t.CategoryId);     
    } 
} 

---

起初，我刪除了這條線：

.ForeignKey("dbo.Users", t => t.OwnerId) 

並重新部署該網站。還是一樣的錯誤。

然後我刪除.Index(t => t.OwnerId)從Auctions表創建。 發生同樣的錯誤。

---

附加信息：

在方法的Global.asax的Application_Start()我有這樣一行：

System.Data.Entity.Database.SetInitializer(new System.Data.Entity.MigrateDatabaseToLatestVersion<AuctionDataContext, Configuration>()); 

在web.config中<configSections>的：

<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> 

我的初始化是在Configuration類：

public class Configuration : DbMigrationsConfiguration<OnlineAuction.Models.Entities.AuctionDataContext> 
    { 
     public Configuration() 
     { 
      AutomaticMigrationsEnabled = true; 
     } 

     protected override void Seed(AuctionDataContext context) 
     { 
      ***All my initializations go here 
     } 
    } 

---

問題：如何解決？

---

Answer 1

據我所知，ForeignKeyIndexConvention代碼第一次會議可能會導致對模型中的任何外鍵的列創建索引。您可以嘗試在DbContext.OnModelCreating方法中刪除此約定。

protected override void OnModelCreating(DbModelBuilder modelBuilder) 
{ 
    //your code 

    //remove ForeignKeyIndexConvention 
    modelBuilder.Conventions.Remove<ForeignKeyIndexConvention>(); 
}