2

我创建了一个模型优先图表，指向现有数据库上的几个视图。当我尝试查询所述数据库时，EF 会尝试创建和更新所述数据库（尽管被告知不要这样做）。

与许多想要查询的现有数据库一样，我有 SELECT 权限，但没有数据库创建权限。我不希望 EF 为这个特定的 DB (MyDb) 创建任何对象

有一些奇怪的事情： 1. 模型不需要更新数据库（它与视图匹配） 2. Database.SetInitializer(null) //Set on MVC Application_Start 3. 为了排除故障，添加。doesExist 返回 true，因此 EF 不应尝试创建 DB。使用 SetInitializer 集更是如此。

        using (var myDb = new MyDBContext1())
        {
            bool doesExist = myDb.Database.Exists(); //return true, the DB does exist!
        }

我希望我错了，但这似乎是 EF 中的一个初始化程序错误，不符合我的偏好。请证明我错了:)

关于我的设置： - 使用 Visual Studio 2013 预览版和 EF6 Beta 1 - 项目中有另一个“代码优先”模型和 DBContext2（用于另一个数据库）。我拥有的这个数据库并且可以创建/更新数据库以匹配模型更改（如果我愿意的话）-DBContext2 已经为它打开了一段时间的代码迁移。我删除了所有配置和迁移表，认为它可能会间接影响其他上下文（MyDBContext1），但它没有帮助。

--Stack Trace-- //为什么DBMigration和AutoMigrate在这里运行？？

//当然权限被拒绝。我没有对这个特定数据库的 SA 访问权限（也不需要它）。我只想运行 SELECT 语句。

System.Data.SqlClient.SqlException was unhandled by user code
  HResult=-2146232060
  Message=CREATE TABLE permission denied in database 'MyDb'.
  Source=.Net SqlClient Data Provider
  ErrorCode=-2146232060
  Class=14
  LineNumber=1
  Number=262
  Procedure=""
  Server=MyDBServer
  State=1
  StackTrace:
       at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
       at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
       at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
       at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
       at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
       at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
       at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
       at System.Data.Entity.Infrastructure.InternalDispatcher`1.Dispatch[TResult](Func`1 operation, Action`1 executing, Func`3 executed)
       at System.Data.Entity.Infrastructure.DbCommandDispatcher.NonQuery(DbCommand command, DbInterceptionContext interceptionContext)
       at System.Data.Entity.Internal.InterceptableDbCommand.ExecuteNonQuery()
       at System.Data.Entity.Migrations.DbMigrator.ExecuteSql(DbTransaction transaction, MigrationStatement migrationStatement)
       at System.Data.Entity.Migrations.Infrastructure.MigratorBase.ExecuteSql(DbTransaction transaction, MigrationStatement migrationStatement)
       at System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsInternal(IEnumerable`1 migrationStatements, DbConnection connection)
       at System.Data.Entity.Migrations.DbMigrator.<>c__DisplayClass2f.<ExecuteStatements>b__2b()
       at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()
       at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 func)
       at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action action)
       at System.Data.Entity.Migrations.DbMigrator.ExecuteStatements(IEnumerable`1 migrationStatements)
       at System.Data.Entity.Migrations.Infrastructure.MigratorBase.ExecuteStatements(IEnumerable`1 migrationStatements)
       at System.Data.Entity.Migrations.DbMigrator.ExecuteOperations(String migrationId, XDocument targetModel, IEnumerable`1 operations, IEnumerable`1 systemOperations, Boolean downgrading, Boolean auto)
       at System.Data.Entity.Migrations.DbMigrator.AutoMigrate(String migrationId, XDocument sourceModel, XDocument targetModel, Boolean downgrading)
       at System.Data.Entity.Migrations.Infrastructure.MigratorBase.AutoMigrate(String migrationId, XDocument sourceModel, XDocument targetModel, Boolean downgrading)
       at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
       at System.Data.Entity.Migrations.Infrastructure.MigratorBase.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
       at System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
       at System.Data.Entity.Migrations.DbMigrator.<>c__DisplayClass9.<Update>b__8()
       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()
       at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext)
       at System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext)
       at System.Data.Entity.Database.Create(Boolean skipExistsCheck)
       at System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context)
       at System.Data.Entity.Internal.InternalContext.<>c__DisplayClassc`1.<CreateInitializationAction>b__b()
       at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
       at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()
       at System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c)
       at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)
       at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)
       at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()
       at System.Data.Entity.Internal.InternalContext.Initialize()
       at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
       at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
       at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
       at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
       at System.Linq.Queryable.Where[TSource](IQueryable`1 source, Expression`1 predicate)
.....
       at lambda_method(Closure , ControllerBase , Object[] )
       at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
       at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.ActionInvocation.InvokeSynchronousActionMethod()
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__36(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
       at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
       at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
       at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult](IAsyncResult asyncResult, Object tag)
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3c()
       at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass45.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3e()
  InnerException:
4

1 回答 1

1

你有一个静态初始化程序MyDBContext1吗？

static MyDBContext1()
{
    Database.SetInitializer<MyDBContext1>(null);
}
于 2013-07-12T08:19:23.250 回答