undefined method `group_by_day' - rails 3.2

Question

I want to make a line-chart of the number of User signups (per day) using chartkick, it is a simple one line code but it is giving an error

Answer 1

I can't see the definition of the group_by_day method. This is not a standard method. May be you are referencing group_by.

In any case, group_by is not defined for the ActiveRecord class. It's defined on array.

You first have to fetch the record into an Array. Also, if created_at is a method, you need to pass is using the &.

User.all.group_by(&:created_at)

Also, I'm not sure the .count at the end behaves as you may expect. It's counting the groups of the dates (and in case of created_at it will return almost one item for each record because the created_at is really hardly duplicated)

Answer 2

To have group_by_day supported, you need to bundle another gem: groupdate from the same author of Chartkick.