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.where(%[TIMESTAMP ? - TIMESTAMP ? BETWEEN "duration_min" AND "duration_max"], DateTime.now, 10.hours.ago)
#=> #]>