MongoDB: Is it possible to make a case-insensitive query?

Question

Example:

> db.stuff.save({\"foo\":\"bar\"});

> db.stuff.find({\"foo\":\"bar\"}).count();
1
> db.stuff.find({\"foo\":\"BAR\"}).count();
0
         


        

Answer 1

I've created a simple Func for the case insensitive regex, which I use in my filter.

private Func CaseInsensitiveCompare = (field) => 
            BsonRegularExpression.Create(new Regex(field, RegexOptions.IgnoreCase));

Then you simply filter on a field as follows.

db.stuff.find({"foo": CaseInsensitiveCompare("bar")}).count();