Question

In the development of express website, I use mongoose to do full-text search, the code is as follows:

var keywords = req.query.keywords;
 Article.find().where('content').equals(new RegExp(keywords, 'i'));

This can be retrieved normally in most cases, but if keywords contain Chinese characters, for example:

Var keywords =' stomach wants to eat';
 Article.find().where('content').equals(new RegExp(keywords, 'i'));

At this time, you will not be able to find mongoose information that contains “belly wants to eat” in the content.

What can I do to make keywords with white space search normally?

Answer 1

In general, the space symbol in the search keyword represents a separator, which separates the query content into multiple keywords, namely
Key words:bellyRepresents searching for belly-related content
Key words:My stomach wants to eatOn behalf of the search includes both belly and want to eat content

First of all, you have to find out what you want to search for
ContainMy stomach wants to eatThe content of
Or does it include bothbellyAndWant to eatThe content of

Younew RegExp(keywords, 'i')This code is definitely problematic. What if keywords contain regular keywords?

I found a regular one on the internet, you can try it.
/(? =.? aa)(? =.? Bb)/mg match contains both aa and bb

Escape keywords including
^$()*+? .|[]{}

new RegExp('12$31]23^'.replace(/([\^\$\(\)\*\+\?  \.\\\|\[\]\{\}])/g, "\\$1"), 'g').test('12312312312$31]23^asdasd')
 true
 new RegExp('12$31]23^', 'g').test('12312312312$31]23^asdasd')
 false
 
 var keyword = '12$31]23^';
 //Escape regular keywords
 keyword = keyword.replace(/([\^\$\(\)\*\+\?  \.\\\|\[\]\{\}])/g, "\\$1");
 new RegExp(keyword, 'mg')