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mongo db mongodb search index engine

创建全文索引

考虑以下 posts 集合的文档数据，包含了文章内容（post_text）及标签(tags)：
{
   "post_text": "enjoy the mongodb articles on Runoob",
   "tags": [
      "mongodb",
      "runoob"
   ]
}
我们可以对 post_text 字段建立全文索引，这样我们可以搜索文章内的内容：
>db.posts.ensureIndex({post_text:"text"})

使用全文索引

现在我们已经对 post_text 建立了全文索引，我们可以搜索文章中的关键词 runoob：
>db.posts.find({$text:{$search:"runoob"}})

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