Question

我git克隆了Nuget Gallery，它基于sql服务器。

由于NuGet图库使用的是entityframework 6，我正尝试按照以下步骤迁移到mysql：

1。将web.config的connectionString替换为以下

<add name="Gallery.SqlServer" connectionString="server=localhost;uid=root;password=123456;database=NuGetGallery" providerName="MySql.Data.MySqlClient"/>
<add name="Gallery.SupportRequestSqlServer" connectionString="server=localhost;userid=root;password=123456;database=SupportRequest" providerName="MySql.Data.MySqlClient"/>

2。用以下内容替换实体框架部分：

<entityFramework codeConfigurationType="NuGetGallery.EntitiesConfiguration, NuGetGallery.Core">
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>
<providers>
  <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6" />
  <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
</providers>

3。将 EntitiesContext 和 SupportRequestDbContext

的[DbConfigurationType(typeof(EntitiesConfiguration))]替换为

[DbConfigurationType(typeof(MySqlEFConfiguration))]

4。将EntitiesConfiguration（）构造函数替换为

    public EntitiesConfiguration()
    {
        // Configure Connection Resiliency / Retry Logic
        // See https://msdn.microsoft.com/en-us/data/dn456835.aspx and msdn.microsoft.com/en-us/data/dn307226
        SetExecutionStrategy(MySqlProviderInvariantName.ProviderName, () => new MySqlExecutionStrategy());
    }

但是，没有运气！

当我执行Update-Database -ConfigurationTypeName MigrationsConfiguration -Verbose时，它引发了如下异常：

使用启动项目“ NuGetGallery”。使用NuGet项目“ NuGetGallery”。指定“ -Verbose”标志以查看应用于目标数据库的SQL语句。 System.NullReferenceException：未将对象引用设置到对象的实例。在MySql.Data.MySqlClient.MySqlProviderServices.GetDbProviderManifestToken（DbConnection连接）在System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken（DbConnection连接）在System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked（DbProviderServices providerServices，DbConnection连接）在System.Data.Entity.Infrastructure.DefaultManifestTokenResolver。<> c__DisplayClass1.b__0（Tuple 3 k) 在 System.Collections.Concurrent.ConcurrentDictionary 2.GetOrAdd（TKey键，Func 2 valueFactory) 在 System.Data.Entity.Infrastructure.DefaultManifestTokenResolver.ResolveManifestToken(DbConnection connection) 在 System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest) 在 System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection) 在 System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext) 在 System.Data.Entity.Internal.RetryLazy 2.GetValue（TInput输入）在System.Data.Entity.Internal.LazyInternalContext.InitializeContext（）在System.Data.Entity.Internal.InternalContext.ForceOSpaceLoadingForKnownEntityTypes（）在System.Data.Entity.DbContext.System.Data.Entity.Infrastructure.IObjectContextAdapter.get_ObjectContext（）在NuGetGallery.ObjectMaterializedInterceptingDbContext.get_ObjectContext（）位置E：\ git \ HSY.NugetGallery \ src \ NuGetGallery.Core \ Entities \ Interception \ ObjectMaterializedInterceptingDbContext.cs：行号35 在NuGetGallery.ObjectMaterializedInterceptingDbContext..ctor（String connectionString）位置E：\ git \ HSY.NugetGallery \ src \ NuGetGallery.Core \ Entities \ Interception \ ObjectMaterializedInterceptingDbContext.cs：行号19 在NuGetGallery.EntitiesContext..ctor（字符串connectionString，布尔型只读）位置E：\ git \ HSY.NugetGallery \ src \ NuGetGallery.Core \ Entities \ EntitiesContext.cs：行号42 在NuGetGallery.EntitiesContext..ctor（）位置E：\ git \ HSY.NugetGallery \ src \ NuGetGallery.Core \ Entities \ EntitiesContext.cs：行号34

如何使Nuget Gallery支持mysql？

0 个答案: