Question

当我尝试针对Raven DB运行以下查询时，我得到“不支持表达式类型：System.Linq.Expressions.TypedParameterExpression”异常。

        var userIdsICareAbout = Session.Query<User>()
            .Where(u => u.Username == username
                        || u.Managers.Any(m => m == username))
            .Select(u => u.Username)
            .ToList();

        var kudos = Session.Query<Kudo>()
            .Where(k => userIdsICareAbout.Any(u => u == k.GivingUserId)
                        || userIdsICareAbout.Any(u => u == k.ReceivingUserId))
            .ToList();

我可以以某种方式进行这样的查询吗？

谢谢，马特

Answer 1

你可以尝试

    var userIdsICareAbout = Session.Query<User>()
        .Where(u => u.Username == username
                 || u.Managers.Any(m => m == username))
        .Select(u => u.Username)
        .ToList();

    var kudos = Session.Query<Kudo>()
        .Where(k => k.GivingUserId.In<string>(userIdsICareAbout)
                 || k.ReceivingUserId.In<string>(userIdsICareAbout)
        .ToList();

您需要添加using Raven.Client.Linq才能允许In<string>

使用Raven DB的TypedParameterExpression任何查询

1 个答案: