仅按 mongodb 中的值匹配并返回文档的 id

Question

I have inserted some json data into mongodb and I wanted to perform a simple search by matching only the values irrespective of the keys (Since keys are different for different documents) and wanted to return the id of the document. I don't know how to compare only by values in mongodb.

Example: Suppose if am searching for word "Knowledge" it should return all the ids of the document which contain the word "Knowledge" irrespective of its key value.

Answer 1

您需要使用通配符文本索引。

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

Answer 2

If there is a static superset of fieldnames, you may find text indexes and the $text query operator useful for word-based searches.

Create the text index on every potential field, and those contained in each document will be included.