Mongo如何在多个字段中查询某个关键字？

If a text index has multiple fields in Mongo, how can I do a search in only one field since the weight is applied to the index and not to the query?

 

1 Answer

 

I assume you are using MongoDB version 2.4 to 3.x

You have no other choices than using MongoDB Text search.

below two approaches may helpful.

1. Indexing Multiple Fields (Compound Indexing)

db.yourcollection.createIndex({"textfield1":"text","textfield2":"text"})

Compound index is combination of both indices, works only if we search on both fields with given values.

2. Indexing the Entire Document (Wildcard Indexing)

db.yourcollection.createIndex({"$**":"text"})

Though the option two is not recommended. But if you use more text fields those are searchable every time, saves you time. One index fits for all.

reference: Full-Text Search in MongoDB (Just to take examples from it)

 

建立完索引后, 可以用如下的查询：

db.collectionName.find({$text: {$search: "keyword"}})

 

但是好像只能查到带有整个单词的记录，不能查到包含这个单词的记录。

 

详细的查询语法在这里： https://docs.mongodb.com/manual/reference/operator/query/text/