asp.net-mvc – 运行Update-Database时出错

Using StartUp project ‘WebApplication’. Using NuGet project
‘WebApplication’. Specify the ‘-Verbose’ flag to view the SQL
statements being applied to the target database. Target database is:
‘Frappuccino’ (DataSource: (Localdb)v11.0,Provider:
System.Data.SqlClient,Origin: Configuration). No pending explicit
migrations. Applying automatic migration:
201402032027563_AutomaticMigration. ALTER TABLE [dbo].[Clients] ALTER
COLUMN [ID] [int] NOT NULL System.Data.SqlClient.SqlException
(0x80131904): The object ‘PK_dbo.Clients’ is dependent on column ‘ID’.
The object ‘FK_dbo.Users_dbo.Clients_Client_ID’ is dependent on column
‘ID’. ALTER TABLE ALTER COLUMN ID failed because one or more objects
access this column. at
System.Data.SqlClient.SqlConnection.OnError(SqlException exception,
Boolean breakConnection,Action1 wrapCloseInAction) at
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException
exception,Boolean breakConnection,Action1 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(TaskCompletionSource1
completion,String methodName,Boolean sendToPipe,
Boolean asyncWrite) at
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at
System.Data.Entity.Infrastructure.Interception.InternalDispatcher1.Dispatch[TInterceptionContext,TResult](Func1
operation,TInterceptionContext interceptionContext,Action1
executing,Action1 executed) at
System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand
command,DbCommandInterceptionContext 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.MigratorLoggingDecorator.ExecuteSql(DbTransaction
transaction,MigrationStatement migrationStatement) at
System.Data.Entity.Migrations.DbMigrator.ExecuteStatementsInternal(IEnumerable1
migrationStatements,DbConnection connection) at
System.Data.Entity.Migrations.DbMigrator.<>c_DisplayClass32.b_2e()
at
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c_DisplayClass1.b_0()
at
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func1
operation) at
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action
operation) at
System.Data.Entity.Migrations.DbMigrator.ExecuteStatements(IEnumerable1
migrationStatements) at
System.Data.Entity.Migrations.Infrastructure.MigratorBase.ExecuteStatements(IEnumerable1
migrationStatements) at
System.Data.Entity.Migrations.DbMigrator.ExecuteOperations(String
migrationId,XDocument targetModel,IEnumerable1 operations,
IEnumerable1 systemOperations,Boolean downgrading,Boolean auto)
at System.Data.Entity.Migrations.DbMigrator.AutoMigrate(String
migrationId,XDocument sourceModel,Boolean
downgrading) at
System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.AutoMigrate(String
migrationId,Boolean
downgrading) at
System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable1
pendingMigrations,String targetMigrationId,String lastMigrationId)
at
System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1
pendingMigrations,String lastMigrationId)
at System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String
targetMigration) at
System.Data.Entity.Migrations.DbMigrator.<>c_DisplayClassc.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) ClientConnectionId:9854ba62-772c-4ba6-b185-ecae993e065f The
object ‘PK_dbo.Clients’ is dependent on column ‘ID’. The object
‘FK_dbo.Users_dbo.Clients_Client_ID’ is dependent on column ‘ID’.
ALTER TABLE ALTER COLUMN ID failed because one or more objects access
this column.

在此之前我做的是将ID变量从我的Code-First Model类从Int16更改为Int32.

有什么帮助吗？