How do I make case-insensitive queries on Mongodb?

Question

var thename = \'Andrew\';
db.collection.find({\'name\':thename});

How do I query case insensitive? I want to find result even if \"andrew\";

Answer 1

MongoDB 3.4 now includes the ability to make a true case-insensitive index, which will dramtically increase the speed of case insensitive lookups on large datasets. It is made by specifying a collation with a strength of 2.

Probably the easiest way to do it is to set a collation on the database. Then all queries inherit that collation and will use it:

db.createCollection("cities", { collation: { locale: 'en_US', strength: 2 } } )
db.names.createIndex( { city: 1 } ) // inherits the default collation

You can also do it like this:

db.myCollection.createIndex({city: 1}, {collation: {locale: "en", strength: 2}});

And use it like this:

db.myCollection.find({city: "new york"}).collation({locale: "en", strength: 2});

This will return cities named "new york", "New York", "New york", etc.

For more info: https://jira.mongodb.org/browse/SERVER-90