app/controllers/prev_task_relationships_controller.rb
# Prev Task Relationships Controller
class PrevTaskRelationshipsController < ApplicationController
before_action :authenticate_user!
include RelationTask
def create
add_relation_to_current(params[:prev_task], params[:next_task], :add_prev_task)
end
def destroy
delete_relation_from_current(params[:delete_id], params[:id], :delete_prev_task)
end
end