class RuboCop::Cop::Rails::ScopeArgs

scope :something, -> { where(something: true) }
# good
scope :something, where(something: true)
# bad
@example
a method (usually a scope) instead of a lambda/proc.
Checks for scope calls where it was passed

def on_send(node) 

def on_send(node)
  scope?(node) do |second_arg|
    add_offense(second_arg) do |corrector|
      corrector.replace(second_arg, "-> { #{second_arg.source} }")
    end
  end
end