Loading staging environment (Rails 5.0.0.1)
irb(main):001:0> Flyer.where(slug: "weekly-ad").count
=> 465
irb(main):002:0> Flyer.where(slug: "weekly-ad").update_all(slug: "weekly")
=> 465
irb(main):003:0> Flyer.where(slug: "weekly-ad").count
=> 0
irb(main):004:0>