unk.rb

class Post < ActiveRecord::Base
  acts_as_paranoid
  default_scope where :status => nil
end

# > Post
#  => Post(id: integer, title: string, body: text, deleted_at: datetime, created_at: datetime, updated_at: datetime, status: string)
# > Post.all
#   Post Load (0.2ms)  SELECT "posts".* FROM "posts" WHERE "posts"."status" IS NULL AND ("posts"."deleted_at" IS NULL)
#  => []
# > scope = Post.scoped.with_default_scope
#   Post Load (0.2ms)  SELECT "posts".* FROM "posts" WHERE "posts"."status" IS NULL AND ("posts"."deleted_at" IS NULL)
#  => []
# > scope = Post.scoped.with_default_scope; nil
#  => nil
# > scope.where_values
#  => ["\"posts\".\"deleted_at\" IS NULL", #<Arel::Nodes::Equality:0x0000010a5ba300 @left=#<struct Arel::Attributes::Attribute relation=#<Arel::Table:0x0000010a62cd10 @name="posts", @engine=Post(id: integer, title: string, body: text, deleted_at: datetime, created_at: datetime, updated_at: datetime, status: string), @columns=nil, @aliases=[], @table_alias=nil, @primary_key=nil>, name=:status>, @right=nil>]
# > scope.where_values.shift
#  => "\"posts\".\"deleted_at\" IS NULL"
# > scope.all
#   Post Load (0.3ms)  SELECT "posts".* FROM "posts" WHERE "posts"."status" IS NULL

間違えて連投してしまいました・・・すみません