[英]Solr query NOT on nested child documents
如何查询父文档,子文档没有特定的字段值?
例如:假设我们有以下数据结构:
{
"type_s": "book",
"id_l": 4294967298,
"title_s": "The Little Mermaid"
{
"type_s": "review",
"id_l": "4294967451",
"reviewer_s": "Freeman, Gordon",
"comment_s": "Great book!"
},
{
"type_s": "review",
"id_l": "4294967452",
"reviewer_s": "Denton, J.C.",
"comment_s": "My daughter loved it!"
}
},
{
"type_s": "book",
"id_l": 4294967298,
"title_s": "Lion King"
{
"type_s": "review",
"id_l": "4294967457",
"reviewer_s": "Woods, Susanne",
"comment_s": "One of the best!"
},
{
"type_s": "review",
"id_l": "4294967458",
"reviewer_s": "Denver, Michel",
"comment_s": "Liked the ending!"
}
},
{
"type_s": "book",
"id_l": 4294967298,
"title_s": "7 dwarves"
{
"type_s": "review",
"id_l": "4294967453",
"reviewer_s": "Freeman, Gordon",
"comment_s": "Great book!"
},
{
"type_s": "review",
"id_l": "4294967454",
"reviewer_s": "Delacroix, Marie",
"comment_s": "Too many dwarves!"
}
}
如果我想让所有书籍都有“Freeman”的评论,我会这样做:
&fq={!parent which='type_s:book'}type_s:review AND reviewer_s:Freeman
这样会给我两本书。
但是,如果我想让所有书籍都没有“Freeman”的评论,我该怎么办?
我试过这样的
&fq={!parent which='type_s:book'}type_s:review AND reviewer_s:(NOT Freeman)
这给了我0个结果
和这个
&fq={!parent which='type_s:book'}type_s:review AND NOT reviewer_s:Freeman)
这给了我所有的父文件。
以下更有希望,它给了我一些结果(在我的实际用例中)
&fq={!parent which='type_s:book'}type_s:review AND -reviewer_s:["" TO *]
请注意,我也使用单引号中的搜索词来尝试查询。
如果solr在elasticsearch中具有类似include_in_parent的功能,那么这是可以实现的。 但是,如果您以不同的方式略微索引数据,您将能够实现您想要的效果。 您需要将审阅者索引为父文档中的多值字段(实际上,当您使用include_in_parent
时,elasticsearch会在幕后做这件事:)
[{
"type_s": "book",
"id": 4294967298,
"title_s": "The Little Mermaid",
"reviewers_ms": ["Freeman, Gordon", "Denton, J.C."],
...
}, {
"type_s": "book",
"id": 4294967299,
"title_s": "Lion King",
"reviewers_ms": ["Woods, Susanne", "Denver, Michel"],
...
}, {
"type_s": "book",
"id": 4294967300,
"title_s": "7 dwarves",
"reviewers_ms": ["Freeman, Gordon", "Delacroix, Marie"],
...
}]
然后,如果您按以下过滤,您将得到想要的结果:
type_s:book AND -reviewers_ms:"Freeman, Gordon"
我找到了一种无需特殊索引即可解决问题的方法。 这个过滤器对我有用:
type_s:book AND -{!parent which='type_s:book' v='reviewer_s:"Freeman, Gordon"'}
此语法还应修复您在评论中提到的问题
但是,如果我有另一个字段,在嵌套文档中说“reviewer_type”,并且我想以组合方式过滤,该怎么办?
type_s:book AND -{!parent which='type_s:book' v='reviewer_s:"Freeman, Gordon" AND type_s:"review"'}
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