lexik/LexikFormFilterBundle — pull request #4 by Inori (2012-04-27 12:51:08+00:00)
Title: added default equality operators to number range filter

I think biggest use-case for number range filter is when you want equal to/greater than on left side and smaller than/equal to right side.

So it would be reasonable to provide users an out of the box option to use it like this.