Add time sensitive period splitting

README.md

@@ -151,6 +151,12 @@ class AddEmployeeAssignmentsOverlappingDatesConstraint < ActiveRecord::Migration
 end
 ```
 
+## Time sensitive records
+
+If you need your records to be split with time component, then set `start_at` and `end_at` columns to `datetime` type.
+
+When creating database constraint instead of `DATERANGE` use `TSRANGE`.
+
 ## Gapless records
 
 If you want to avoid gaps between records, you can include also `PeriodicRecords::Gapless`.

lib/periodic_records/model.rb

@@ -76,6 +76,10 @@ def periodic_dup
       dup
     end
 
+    def periodic_increment
+      use_datetime? ? 0.000001.second : 1.day
+    end
+
     private
 
     def set_default_period
@@ -89,26 +93,30 @@ def destroy_overlapping_record(overlapping_record)
 
     def split_overlapping_record(overlapping_record)
       overlapping_record_end = overlapping_record.periodic_dup
-      overlapping_record_end.start_at = end_at + 1.day
+      overlapping_record_end.start_at = end_at + periodic_increment
       overlapping_record_end.end_at   = overlapping_record.end_at
 
       overlapping_record_start = overlapping_record
-      overlapping_record_start.end_at = start_at - 1.day
+      overlapping_record_start.end_at = start_at - periodic_increment
 
       overlapping_record_start.save(validate: false)
       overlapping_record_end.save(validate: false)
     end
 
     def adjust_overlapping_record_end_at(overlapping_record)
-      overlapping_record.end_at = start_at - 1.day
+      overlapping_record.end_at = start_at - periodic_increment
       overlapping_record.save(validate: false)
     end
 
     def adjust_overlapping_record_start_at(overlapping_record)
-      overlapping_record.start_at = end_at + 1.day
+      overlapping_record.start_at = end_at + periodic_increment
       overlapping_record.save(validate: false)
     end
 
+    def use_datetime?
+      %w(start_at end_at).all? { |a| self.class.type_for_attribute(a).type == :datetime }
+    end
+
     def validate_dates
       if start_at && end_at && end_at < start_at
         errors.add :end_at, :invalid

spec/models.rb

@@ -15,6 +15,27 @@ def siblings
   end
 end
 
+class TimeSensitiveEmployee < ActiveRecord::Base
+  self.table_name = 'employees'
+
+  include PeriodicRecords::Associations
+
+  has_many :employee_assignments, inverse_of: :employee,
+    class_name: 'TimeSensitiveEmployeeAssignment',
+    foreign_key: :employee_id
+  has_periodic :employee_assignments, as: :assignments
+end
+
+class TimeSensitiveEmployeeAssignment < ActiveRecord::Base
+  include PeriodicRecords::Model
+
+  belongs_to :employee
+
+  def siblings
+    self.class.where(employee_id: employee_id).where.not(id: id)
+  end
+end
+
 class GaplessEmployee < ActiveRecord::Base
   self.table_name = 'employees'