Method: ActiveRecord::QueryMethods#invert_where

Defined in:

activerecord/lib/active_record/relation/query_methods.rb

#invert_where ⇒ Object

Allows you to invert an entire where clause instead of manually applying conditions.

class User
  scope :active, -> { where(accepted: true, locked: false) }
end

User.where(accepted: true)
# WHERE `accepted` = 1

User.where(accepted: true).invert_where
# WHERE `accepted` != 1

User.active
# WHERE `accepted` = 1 AND `locked` = 0

User.active.invert_where
# WHERE NOT (`accepted` = 1 AND `locked` = 0)

Be careful because this inverts all conditions before invert_where call.

class User
  scope :active, -> { where(accepted: true, locked: false) }
  scope :inactive, -> { active.invert_where } # Do not attempt it
end

# It also inverts `where(role: 'admin')` unexpectedly.
User.where(role: 'admin').inactive
# WHERE NOT (`role` = 'admin' AND `accepted` = 1 AND `locked` = 0)

# File 'activerecord/lib/active_record/relation/query_methods.rb', line 1101

def invert_where
  spawn.invert_where!
end