c# - Nunit MySQL 错误

Question

使用 NUnit 测试时出现 MySQL 异常。我已经在两台机器上安装了 MySQL Connector 6.6.5，但是其中一台系统在使用 Nunit 运行相同的测试时出现以下错误。而在其他系统中它工作成功。

at MySql.Data.MySqlClient.MySqlClientFactory.get_MySqlDbProviderServicesInstance()
at MySql.Data.MySqlClient.MySqlClientFactory.System.IServiceProvider.GetService(Type serviceType)
at System.Data.Common.DbProviderServices.GetProviderServices(DbProviderFactory factory)
at System.Data.Metadata.Edm.StoreItemCollection.Loader.InitializeProviderManifest(Action`3 addError)
at System.Data.EntityModel.SchemaObjectModel.Schema.HandleAttribute(XmlReader reader)
at System.Data.EntityModel.SchemaObjectModel.SchemaElement.ParseAttribute(XmlReader reader)
at System.Data.EntityModel.SchemaObjectModel.SchemaElement.Parse(XmlReader reader)
at System.Data.EntityModel.SchemaObjectModel.Schema.HandleTopLevelSchemaElement(XmlReader reader)
at System.Data.EntityModel.SchemaObjectModel.Schema.InternalParse(XmlReader sourceReader, String sourceLocation)
at System.Data.EntityModel.SchemaObjectModel.Schema.Parse(XmlReader sourceReader, String sourceLocation)
at System.Data.EntityModel.SchemaObjectModel.SchemaManager.ParseAndValidate(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, SchemaDataModelOption dataModel, AttributeValueNotification providerNotification, AttributeValueNotification providerManifestTokenNotification, ProviderManifestNeeded providerManifestNeeded, IList`1& schemaCollection)
at System.Data.Metadata.Edm.StoreItemCollection.Loader.LoadItems(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths)
at System.Data.Metadata.Edm.StoreItemCollection.Init(IEnumerable`1 xmlReaders, IEnumerable`1 filePaths, Boolean throwOnError, DbProviderManifest& providerManifest, DbProviderFactory& providerFactory, String& providerManifestToken, Memoizer`2& cachedCTypeFunction)
at System.Data.Metadata.Edm.StoreItemCollection..ctor(IEnumerable`1 xmlReaders, IEnumerable`1 filePaths)
at System.Data.Metadata.Edm.MetadataCache.StoreMetadataEntry.LoadStoreCollection(EdmItemCollection edmItemCollection, MetadataArtifactLoader loader)
at System.Data.Metadata.Edm.MetadataCache.LoadItemCollection[T](IItemCollectionLoader`1 itemCollectionLoader, T entry)
at System.Data.Metadata.Edm.MetadataCache.GetOrCreateStoreAndMappingItemCollections(String cacheKey, MetadataArtifactLoader loader, EdmItemCollection edmItemCollection, Object& entryToken)
at System.Data.EntityClient.EntityConnection.LoadStoreItemCollections(MetadataWorkspace workspace, DbConnection storeConnection, DbProviderFactory factory, DbConnectionOptions connectionOptions, EdmItemCollection edmItemCollection, MetadataArtifactLoader artifactLoader)
at System.Data.EntityClient.EntityConnection.GetMetadataWorkspace(Boolean initializeAllCollections)
at System.Data.Objects.ObjectContext.EnsureMetadata()
at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption)
at System.Data.Objects.ObjectQuery.ToTraceString()
at FreeLance.Data.Framework.EntityFramework.Repository`1.GetSingle(Expression`1 where, Expression`1[] include) in D:\CMS_Org\SonnetCMS\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Repository.cs:line 114
at FreeLance.Business.PageBC.GetUserName(Int32 userId) in D:\CMS_Org\SonnetCMS\FreeLance\Business\FreeLance.Business\Admin\PageBC.cs:line 179
at FreeLance.Services.PageService.GetUserName(Int32 userId) in D:\CMS_Org\SonnetCMS\FreeLance\Services\FreeLance.Services\PageService.cs:line 42
at TestCMS.Class1.Test() 

编辑:

函数我收到错误的地方:

public virtual TEntity GetSingle(Expression<Func<TEntity, bool>> where, params Expression<Func<TEntity, object>>[] include)
        {
            IQueryable<TEntity> query = this.dbSet.Where(where);
            if (include != null)
            {
                query = this.dbSet.Include<TEntity>(include).Where(where);
            }

            Debug.Write(query.ToString());

            return query.SingleOrDefault<TEntity>();
        }

异常(exception):

来源:MySql.Data

错误:未将对象引用设置为对象的实例。

声明类型:{Name = "MySqlClientFactory"FullName = "MySql.Data.MySqlClient.MySqlClientFactory"}

程序集:{MySql.Data，Version=6.6.5.0，Culture=neutral，PublicKeyToken=c5687fc88969c44d}

在函数 this.dbset 中有 NullReferenceException，而在正常工作的系统中我有 this.dbset，

"{SELECT
`Extent1`.`UserID`, 
`Extent1`.`UserGUID`, 
`Extent1`.`UserCode`, 
`Extent1`.`UserAuthentication`, 
`Extent1`.`UserType`, 
`Extent1`.`UserPassword`, 
`Extent1`.`UserPasswordSalt`, 
`Extent1`.`UserFirstName`, 
`Extent1`.`UserMiddleName`, 
`Extent1`.`UserLastName`, 
`Extent1`.`UserCompanyName`,
`Extent1`.`IsUserNeedToResetPasswordNextLogin`, 
`Extent1`.`UserPasswordExpiryDate`, 
`Extent1`.`UserLoginFailAttempts`, 
`Extent1`.`UserLoginFailDate`, 
`Extent1`.`UserPasswordResetDate`, 
`Extent1`.`UserPasswordResetBy`, 
`Extent1`.`UserLastLoginDate`, 
`Extent1`.`IsUserLoginLocked`, 
`Extent1`.`UserLoginLockedDate`, 
`Extent1`.`IsForUserSecurityQuestionRequired`, 
`Extent1`.`Remarks`, 
`Extent1`.`IsActive`, 
`Extent1`.`CreatedBy`, 
`Extent1`.`CreatedDate`, 
`Extent1`.`UpdatedBy`, 
`Extent1`.`UpdatedDate`
FROM `isuser` AS `Extent1`}"

Answer 1

在 Web.Config 中，我们将数据库提供程序工厂、MySQL 连接器版本从 6.6.5 更改为 6.6.6。这解决了我们的问题。