亚音速3 ActiveRecord的嵌套查询的NotIn错误？ [英] Subsonic 3 ActiveRecord nested select for NotIn bug?

问题描述

我有以下的亚音速3.0的查询，其中包含嵌套NotIn查询：

I have the following Subsonic 3.0 query, which contains a nested NotIn query:

public List<Order> GetRandomOrdersForNoReason(int shopId, int typeId)
{
    // build query    
    var q = new SubSonic.Query.Select().Top("1")
        .From("Order")
        .Where("ShopId")
        .IsEqualTo(shopId)
        .And(OrderTable.CustomerId).NotIn(
            new Subsonic.Query.Select("CustomerId")
                .From("Customer")
                .Where("TypeId")
                .IsNotEqualTo(typeId))
            .OrderDesc("NewId()");

    // Output query
    Debug.WriteLine(q.ToString());   

    // returned typed list
    return q.ExecuteTypedList<Order>();
}

内部查询似乎是不正确的：

The internal query appears to be incorrect:

SELECT TOP 1 *
 FROM [Order]
 WHERE ShopId = @0 AND CustomerId NOT IN (SELECT CustomerId
 FROM [Customer]
 WHERE TypeId = @0)
 ORDER BY NewId() ASC

您会发现，这两个参数是 @ 0 。我假设参数是枚举（从零开始），为每一个新的选择查询。然而，在这种情况下，两个选择查询是嵌套的，我本来期望的输出有两个参数，一个名为 @ 0 和 @ 1

You'll notice that both parameters are @0. I'm assuming that the parameters are enumerated (starting at zero), for each "new" Select query. However, in this case where the two Select queries are nested, I would have expected the output to have two parameters named @0 and @1.

我的查询基于的 之一是罗布科纳介绍了他的博客作为一个preVIEW，成为亚音速Pakala查询工具3.他的例子是：

My query is based on one that Rob Conery gave on his blog as a preview of the "Pakala" query tool that became Subsonic 3. His example was:

int records = new Select(Northwind.Product.Schema)
    .Where("productid")
    .In(
        new Select("productid").From(Northwind.Product.Schema)
        .Where("categoryid").IsEqualTo(5)
        )
    .GetRecordCount();

有其他人看到这种行为？它是一个bug，或者这是一个错误，或者我的一部分？因为我是新来的亚音速我猜测，这可能是程序员的错误在我的部分，但我想确认如果可能的话。

Has anyone else seen this behavior? Is it a bug, or is this an error or my part? Since I'm new to Subsonic I'm guessing that this probably programmer error on my part but I'd like confirmation if possible.

推荐答案

刚碰到这个完全一样的问题，在最新发布的，所以显然它尚未确定。我尝试切换的条件的顺序（把NotIn条件第一），并且没有的伎俩。下面是新的code样子，它生产参数@ 0和@ 1，而不是@ 0和@ 0：

Just came across this exact same issue in the latest release, so apparently it hasn't been fixed yet. I tried switching the order of the conditions (putting the NotIn condition first) and that did the trick. Here's what the new code looks like, which produced parameters @0 and @1 instead of @0 and @0:

var q = new SubSonic.Query.Select().Top("1")
    .From("Order")
    .Where(OrderTable.CustomerId).NotIn(
        new Subsonic.Query.Select("CustomerId")
            .From("Customer")
            .Where("TypeId")
            .IsNotEqualTo(typeId)
    )
    .And("ShopId")
    .IsEqualTo(shopId)
    .OrderDesc("NewId()");

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