ServiceStack ORM Lite 左连接查询过滤器

Question

我无法正确过滤记录。

q = q.LeftJoin<PurchaseInvoice, PurchaseInvoiceProjectLink>((pi, pipl) => pi.Id == pipl.PurchaseInvoiceId);
q = q.Where<PurchaseInvoiceProjectLink>(s => Sql.In(s.ProjectId, UserSession.ProjectIds)) || s == null );

s == null

部分不起作用，我看到它在sql查询中具体化为

 OR ('{}' is null))

我不确定这是否是Servicestack ORM Lite中的一个错误，或者代码应该以其他方式编写。

====

好的。我已经解决了这个问题，如下所示（但仍在寻找不使用 pragma 的方法。

#pragma warning disable CS0472 // The result of the expression is always the same since a value of this type is never equal to 'null'
            q = q.Where<PurchaseInvoiceProjectLink>(s => ... ||  s.PurchaseInvoiceId == null);
#pragma warning restore CS0472 // The result of the expression is always the same since a value of this type is never equal to 'null'

Answer 1

尝试

q = q.LeftJoin<PurchaseInvoice, PurchaseInvoiceProjectLink>((pi, pipl) => pi.Id == pipl.PurchaseInvoiceId).Where<PurchaseInvoiceProjectLink>(s => s.Id == null || UserSession.ProjectIds.Contains(s.ProjectId));