我有一个 PurchaseOrder
类型,它可以有 0 个或多个 VendorStatuses
。我想创建一个过滤器,用于查找 PurchaseOrders
no VendorStatuses
。我该怎么做?
我尝试过的事情:
Filter &= Filter<PurchaseOrder>.HasChild<PoVendorStatus>(c => c
.MaxChildren(0)); //40 results
Filter &= Filter<PurchaseOrder>.HasChild<PoVendorStatus>(c => c
.MaxChildren(0)
.Query(x => x.MatchAll())); // 0 results
Filter &= Filter<PurchaseOrder>.Missing(y => y.VendorStatuses); // 40 results
Filter &= Filter<PurchaseOrder>.Exists(y => y.VendorStatuses); // 0 results
Filter &= Filter<PurchaseOrder>.Nested(nfd => nfd.Path(x => x.VendorStatuses.First())
.Filter(f2 => f2.Missing(y => y.Id)));
//9 results! But these are the ones that *have* statuses, I need the opposite
Filter &= Filter<PurchaseOrder>.Nested(nfd => nfd.Path(x => x.VendorStatuses.First())
.Filter(f2 => f2.Exists(y => y.Id)));
//0 results >:(
Filter &= Filter<PurchaseOrder>.Nested(nfd => nfd.Path(x => x.VendorStatuses)
.Query(f2 => f2.Terms(t => t.VendorStatuses.First().Id, new[] { (long?)null })));
//40 results
Filter &= Filter<PurchaseOrder>.Nested(nfd => nfd.Path(x => x.VendorStatuses)
.Query(f2 => f2.Term(t => t.VendorStatuses.First().Id, null)));
//40 results
索引中有 40 条记录,我知道至少有一条没有供应商状态,但这些查询要么全部返回,要么一无所获。我该如何实现?
我们使用的是 Nest 1.7.2 和 Elasticsearch 1.4.5 版
最佳答案
一位同事找到了一种方法来做到这一点。我们发现,如果我们否定返回所有具有状态的记录的过滤器,它就会起作用。我没有意识到您可以简单地否定这样的过滤器。
Filter &= !Filter<PurchaseOrder>.Nested(nfd => nfd.Path(x => x.VendorStatuses.First())
.Filter(f2 => f2.Missing(y => y.Id)));
关于c# - 在 Elasticsearch Nest 中过滤掉带有子项的行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41107974/