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group_by_period

📅 Use group_by_day/week/month for time-series charts​

Chartkick integrates seamlessly with ActiveSupport’s time grouping methods. By using group_by_day, group_by_week or group_by_month on your ActiveRecord queries, you can generate time-series data automatically. This is ideal for visualizing trends over time without manual aggregation.

# Controller
@signups = User.group_by_day(:created_at, last: 30).count

# View (ERB)
<%= line_chart @signups,
  xtitle: "Date",
  ytitle: "New Signups",
  library: {colors: ["#3498db"]}
%>