Labels for Quarters

[Timo Kleemann]

Hi & thanks for creating this awesome gem!

It's much easier to set up and use than much of what I've seen before.

I'm struggling with creating labels for quarters, though.

It works great for months and years:

Payment.group_by_month(:created_at, format: "%m %Y").sum Payment.group_by_year(:created_at, format: "%Y").sum

For quarters I am using this...

Payment.group_by_quarter(:created_at, format: "%m").sum

...but it doesn't make much sense as it only shows the number of the quarter's first month:

• 1
• 4
• 7
• 10

This would be better:

• 1
• 2
• 3
• 4

I am fully aware that quarters aren't supported by strftime.

So how can this be done?

[Andrew Kane]

Hey @timokleemann, you can use a proc for the format to accomplish that.

Payment.group_by_quarter(:created_at, format: ->(v) { (v.month + 2) / 3 }).sum

[Timo Kleemann]

Works, thank you!

[Cheng Cheng]

Actually, use this one to avoid quarters from different years been aggregated together.

.group_by_quarter(:created_at, format: ->(v) { "#{v.year} Q#{(v.month + 2) / 3}" })