是否可以从现有的AppHarbor SQL Server数据库创建MVC（ASP.NET）？

Question

我想创建一个MVC项目，使用AppHarbor上托管的现有数据库。我试了好几种方案在网上，但大家似乎只建议先创建MVC，然后将其部署到appHarbor ..我有设定为自动迁移，和我目前遇到了此问题：

System.Data.SqlClient.SqlException: There is already an object named 'XXXtable' in the database.

我在我的appHarbor数据库中有一个XXXtable，在MVC中有一个XXXtable.cs。
这是我的web.config文件：

<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
    <configSections> 
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> 
    </configSections> 
    <connectionStrings> 
    <add name="Connection" connectionString="Data Source=xxx;Initial Catalog=xxxxxxx;Persist Security Info=True;User ID=xxxxxx;Password=xxxxxxxxx" providerName="System.Data.SqlClient" /> 
    </connectionStrings> 
    <appSettings> 
    <add key="webpages:Version" value="3.0.0.0" /> 
    <add key="webpages:Enabled" value="false" /> 
    <add key="ClientValidationEnabled" value="true" /> 
    <add key="UnobtrusiveJavaScriptEnabled" value="true" /> 
    </appSettings> 
    <system.web> 
    <authentication mode="None" /> 
    <compilation debug="true" targetFramework="4.5" /> 
    <httpRuntime targetFramework="4.5" /> 
    </system.web> 
    <system.webServer> 
    <modules> 
     <remove name="FormsAuthentication" /> 
    </modules> 
    </system.webServer> 
    <runtime> 
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" /> 
     <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" /> 
     <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" /> 
     </dependentAssembly> 
    </assemblyBinding> 
    </runtime> 
    <entityFramework> 
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework"> 
     <parameters> 
     <parameter value="System.Data.SqlClient" /> 
     </parameters> 
    </defaultConnectionFactory> 
    <providers> 
     <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /> 
     <provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" /> 
    </providers> 
    </entityFramework> 
    <system.data> 
    <DbProviderFactories> 
     <remove invariant="System.Data.SqlClient" /> 
     <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlClient" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" /> 
    </DbProviderFactories> 
    </system.data> 
</configuration> 

我的app.config文件：

<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
    <configSections> 
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> 
    </configSections> 
    <connectionStrings> 
    <add name="Connection" connectionString="Data Source=xxxxx;Initial Catalog=xxxxxxxxxx;Persist Security Info=True;User ID=xxxxxxxxx;Password=xxxxxxxxxxxx" providerName="System.Data.SqlClient" /> 
    </connectionStrings> 
    <entityFramework> 
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework"> 
     <parameters> 
     <parameter value="mssqllocaldb" /> 
     </parameters> 
    </defaultConnectionFactory> 
    <providers> 
     <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /> 
    </providers> 
    </entityFramework> 
</configuration> 

能有人指出正确的方向？谢谢！！

Answer 1

FOUND A SOLUTION：D

删除与迁移有关的所有信息，它将起作用。 在您的上下文文件中：

public class DataContext : DbContext 
{ 
    public DataContext() 
     : base("Connection") 
    { 
    } 
    public DbSet<XXXTable > XXXTable { get; set; } 

}