Discussion on: Design Patterns with Ruby on Rails part 2: Query Object

[scout]

How to pass argument to the call method to use the same query class in multiple scopes?

class StatusPostsQuery
  class << self
    delegate :call, to: :new
  end

  def initialize(relation = Post)
    @relation = relation
  end

  def call(value = 'active')
    @relation.where(status: value)
  end
end

class Post
  scope :active, StatusPostsQuery
  scope :inactive, StatusPostsQuery #...?
end

[Ritchie Paul Buitre]

Shameless plug: I wrote a RubyGem that can do just that. I hope that helps.