Add current scopes for time range models

Author: peteryates

app/models/induction_period.rb

@@ -21,4 +21,6 @@ class InductionPeriod < ApplicationRecord
   belongs_to :mentorship
   belongs_to :appropriate_body
   belongs_to :induction_programme
+
+  scope :current, -> { where(finished_on: nil) }
 end

app/models/tenureship.rb

@@ -19,4 +19,6 @@ class Tenureship < ApplicationRecord
   belongs_to :teacher
   belongs_to :school
   has_many :mentorships
+
+  scope :current, -> { where(finished_on: nil) }
 end