文字搜索不返回某些单词的任何内容 [英] Text search doesn't return anything for certain words

问题描述

我有一个数据库，其中包含条目"集合，其结构如下:

I have a database with an "entries" collection that is structured like so:

{
    tags: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: "Tag"
        }
    ],
    body: String
}

我想要在我的网站上使用搜索功能，因此我在"body"属性上创建了一个文本索引，如下所示:

I wanted a search feature on my site, so I created a text index on the "body" property like this:

db.entries.createIndex( { body: "text" } )

效果很好.我创建了几个条目并运行db.entries.find().我知道了:

It worked fine. I created a couple of entries and ran db.entries.find(). I got this:

{ "_id" : ObjectId("5c2e3d9fd1d5dd121ed85695"), "tags" : [ ], "body" : "some text", "__v" : 0 }
{ "_id" : ObjectId("5c2e3dadd1d5dd121ed85696"), "tags" : [ ], "body" : "text some", "__v" : 0 }

到目前为止，太好了.我搜索db.entries.find({$text: { $search: "text" }})，并且两个条目都被返回.但是，当我搜索db.entries.find({$text: { $search: "some" }})时，我什么也没得到.

So far, so good. I search db.entries.find({$text: { $search: "text" }}) and both of the entries are returned. But when I search db.entries.find({$text: { $search: "some" }}) I get nothing.

我用不同的单词再次尝试了. 教堂"工作正常，但更多"也不返回任何内容.为什么?

I tried this again with different words. "church" works fine, but "more" doesn't return anything either. Why???

推荐答案

MongoDB文本索引会删除一些特定于语言的单词，这些单词被视为建立索引-这样可以防止出现任何停用词，并且可以对整个内容建立索引:

MongoDB text index drops some language-specific words that are considered as Stopwords and some is one of them. To fix that you can build your index with default_language: "none" - this prevents any stopwords and whole content is getting indexed:

db.entries.createIndex(
    { body : "text" },
    { default_language: "none" }
)

完整的英语停用词列表此处.

Full list of English stopwords here.

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