Ransack doesn't work with extended relations

[bartoszkopinski]

Hi,
I'd like to extract some of my scopes out of a model and load them dynamically where needed using ActiveRecord::QueryMethods#extending method.

So I'm defining a sample scope module:

module AdminScopes
  def name_contains name
    where("full_name ILIKE ?", "%#{name}%")
  end

  def ransackable_scopes _
    super + [:name_contains]
  end
end

and this is how it works:

pry(main)> User.all.extending(AdminScopes).name_contains("Phill").count
   (55.4ms)  SELECT COUNT(*) FROM "users"  WHERE (full_name ILIKE '%Phill%')
=> 132

but when I try to use it with ransack I get:

pry(main)> User.all.extending(AdminScopes).ransack(name_contains: "Phill").result.count
NameError: undefined method `name_contains' for class `Class'
--
 0: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/context.rb:61:in `method'
 1: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/context.rb:61:in `scope_arity'
 2: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/search.rb:133:in `add_scope'
 3: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/search.rb:53:in `block in build'
 4: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/search.rb:47:in `each'
 5: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/search.rb:47:in `build'
 6: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/search.rb:39:in `initialize'
 7: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/adapters/active_record/base.rb:15:in `new'
 8: /.rvm/gems/ruby-2.2.2/gems/ransack-1.6.6/lib/ransack/adapters/active_record/base.rb:15:in `ransack'
 9: /.rvm/gems/ruby-2.2.2/gems/activerecord-4.1.12/lib/active_record/relation/delegation.rb:70:in `block in ransack'
10: /.rvm/gems/ruby-2.2.2/gems/activerecord-4.1.12/lib/active_record/relation.rb:292:in `scoping'
11: /.rvm/gems/ruby-2.2.2/gems/activerecord-4.1.12/lib/active_record/relation/delegation.rb:70:in `ransack'
12: (pry):61:in `<main>'

Is there a way to fix this or a workaround for keeping my models free of scoping responsibilities?

[scarroll32]

This issue appears more to be a HOW-TO issue rather than a bug in Ransack. We are in the process of cleaning up the Ransack gem and repo. If this issue is still relevant could you please ask it on StackOverflow?

If you think it is an issue with Ransack, please provide a repo with the issue and / or a pull request with failing tests. If you don't know how to do this, indicate it in the issue and we will look into it eventually.

Thank you

https://github.com/activerecord-hackery/ransack/blob/master/CONTRIBUTING.md

#794