MongoDB Full-text Indexing Usage

How to create a Full-text index:
Db.ensureindex ({key: "text"})
Db.ensureindex ({key1: "text", Key2: "Text"})
Db.ensureindex ({"$**": "Text", Key2: "Text"})


MongoDB the use of Full-text indexing queries:
Db.article.find ({$text: {$search: "Coffee"}}) #查询包含coffee的内容的文档
Db.article.find ({$text: {$search: "AA bb cc"}}) # (or query) query for documents that contain contents of AA or BB or cc
Db.article.find ({$text: {$search: "AA Bb-cc"}}) #-to exclude documents containing CC content
Db.article.find ({$text: {$search: "\ aa\" \ "bb\" \ "Cc\"}) # (with query) add \ Before querying, and query for documents that contain both AA and BB cc content.


Limitations of Full-text Indexing:
A collection can only create one Full-text index, and only one $text query can be specified per query
$text cannot appear in the $nor query
$hint does not work if the query contains $text
Chinese Full-text search is not supported