# Underfine method group\_by\_day

**URL:** <https://www.ruby-forum.com/t/underfine-method-group-by-day/261014>\
**Category:** Uncategorized\
**Created:** [February 23, 2021, 2:27am UTC](https://www.ruby-forum.com/t/underfine-method-group-by-day/261014 "2021-02-23T02:27:04Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![yusoff](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/13edae/32.png) [@yusoff](https://www.ruby-forum.com/u/yusoff)\
**Post date:** [February 23, 2021, 2:27am UTC](https://www.ruby-forum.com/t/underfine-method-group-by-day/261014/1 "2021-02-23T02:27:04Z")

</div>

![errorruby](https://www.ruby-forum.com/uploads/default/optimized/2X/2/29f64ec37fdccec1f77f71ea1ec335dbf2cecdd8_2_690x55.png)  
how to solve undefined method group\_by\_day.. I already use gem groupdate on my rails