使用SimpleRepository的Subsonic 3 Sql Join无法连接具有相同名称的列？

Question

我正在尝试使用Subsonic Fluent查询界面在两个表之间创建一个简单的内部联接：

[SearchJobResults]

PK SearchJobResultId int
名称字符串
描述字符串

[ParseResults]

PK ParseResultId int
名称字符串
SearchJobResultId int

这些表之间存在1对1的关系。

请记住，我没有使用ActiveRecord。我有ParseResult和SearchJobResult的类可以正常工作。

 IDataProvider p  = ProviderFactory.GetProvider("DemacDB");
 SqlQuery query = new SqlQuery(p);            

 var q = new Select(p).From("ParseResults")
         .InnerJoin<SearchJobResult>("SearchJobResultId","SearchJobResultId").GetRecordCount();

此代码抛出异常：

测试方法Models.SearchTests.TestSubsonicQueryMethods抛出异常：System.InvalidOperationException：不知道要加入哪个列 - 在表ParseResults中找不到列SearchJobResultId。

我查看了SubSonic的源代码，看看这个execption的来源：

 private void CreateJoin<T>(string fromColumnName, string toColumnName, Join.JoinType type)
    {
        //see if we can find the table
        var toTable = _provider.FindOrCreateTable(typeof(T));

        //the assumption here is that the FromTable[0] is the table to join from
        if(FromTables.Count == 0)
            throw new InvalidOperationException("Can't join if there's no table to join to - make sure to use From() before InnerJoin");

        if(toTable == null)
            throw new InvalidOperationException("Can't find the table for this type. Try using the Column instead");

        var fromColumn = FromTables[0].GetColumn(fromColumnName);
        if(fromColumn == null)
            throw new InvalidOperationException("Don't know which column to join to - can't find column " + fromColumnName + " in table " + FromTables[0].Name);

        var toColumn = toTable.GetColumn(toColumnName);
        if(toColumn == null)
            throw new InvalidOperationException("Don't know which column to join to - can't find column " + toColumnName + " in table " + toTable.Name);

        CreateJoin(fromColumn, toColumn, Join.JoinType.Inner);
    }

我尝试过使用别名，但失败了。另外，如果我只是这样做一个简单的查询就可以了：

var d = new Select(p).From("ParseResults").GetRecordCount();

Answer 1

事实证明，您需要使用From / Join的Typed T重载来实现此功能。

 var b = new Select(p).From<ParseResult>().InnerJoin<SearchJobResult>("SearchJobResultId", "SearchJobResultId").GetRecordCount();

现在可以正确地枚举Subsonic中的FromTables集合，因为它从实际对象而不是数据库中读取类型。