Enable interventions for ProgrammingGroups and add indices

db/migrate/20231208194632_add_index_to_user_exercise_interventions.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class AddIndexToUserExerciseInterventions < ActiveRecord::Migration[7.1]
+  def change
+    up_only do
+      # We cannot add a foreign key to a table that has rows that violate the constraint.
+      UserExerciseIntervention.where.not(exercise_id: Exercise.select(:id)).delete_all
+      UserExerciseIntervention.where.not(intervention_id: Intervention.select(:id)).delete_all
+    end
+
+    rename_column :user_exercise_interventions, :user_id, :contributor_id
+    rename_column :user_exercise_interventions, :user_type, :contributor_type
+
+    change_column_null :user_exercise_interventions, :contributor_type, false
+    change_column_null :user_exercise_interventions, :contributor_id, false
+    add_index :user_exercise_interventions, %i[contributor_type contributor_id]
+
+    change_column_null :user_exercise_interventions, :exercise_id, false
+    add_index :user_exercise_interventions, :exercise_id
+    add_foreign_key :user_exercise_interventions, :exercises
+
+    change_column_null :user_exercise_interventions, :intervention_id, false
+    add_index :user_exercise_interventions, :intervention_id
+    add_foreign_key :user_exercise_interventions, :interventions
+  end
+
+  class Exercise < ActiveRecord::Base; end
+  class Intervention < ActiveRecord::Base; end
+  class UserExerciseIntervention < ActiveRecord::Base; end
+end