Using interval in PostgreSQL with Ruby on Rails

Question

I want to save durations (2 days, 5 years, ...) as intervals in PostgreSQL from my Rails application.

Both duration_min and duration_max are values like \"2 days\" or \"

Answer 1

You were close:

class CreateExamples < ActiveRecord::Migration
  def change
    create_table :examples do |t|
      t.column :duration_min, :interval
      t.column :duration_max, :interval
      t.timestamps
    end
  end
end

Usage example:

Example.create duration_min: '2 hours', duration_max: '2 days'
#=> #<Example id: 1, duration_min: "2 hours", duration_max: "2 days", created_at: "2013-12-02 14:20:36", updated_at: "2013-12-02 14:20:36">
Example.where(%[TIMESTAMP ? - TIMESTAMP ? BETWEEN "duration_min" AND "duration_max"], DateTime.now, 10.hours.ago)
#=> #<ActiveRecord::Relation [#<Example id: 1, duration_min: "02:00:00", duration_max: "2 days", created_at: "2013-12-02 14:20:36", updated_at: "2013-12-02 14:20:36">]>

Answer 2

We have an implementation of interval for Rails 5.1 that you can try.

https://gist.github.com/vollnhals/a7d2ce1c077ae2289056afdf7bba094a