Setting param with random records of another model

seed.rake

#rand(3..150).times do
#  tender.items << Item.first(offset: rand(Item.count))
#end

# See http://hashrocket.com/blog/posts/rails-quick-tips-random-records

#tender.items = Item.where(Item.pluck(:id).shuffle[0..rand(3..150)])
# For Postgres
tender.items = Item.limit(rand(3..150)).order('RANDOM()')
# For MySQL
#tender.items = Item.limit(rand(3..150)).order('RAND()')