Rails #url_for repeats namespace prefix when resolving a url for a namespaced nested resource

Question

Greetings everyone,

I've the following:

routes.rb:

 namespace :hr do
    resources :employees do
      resources :skills
    end
  end

And those models:
hr/skills.rb

class Hr::Skill < ApplicationRecord
end  

hr/employees.rb:

class Hr::Employee < ApplicationRecord

end

I'm trying to make #url_for resolve to hr_employee_skills_path(@employee, @skill). I need #url_for to work that way because it's internally used by #simple_form_for within SimpleForm.

I tried different combinations of #url_for to give me the desired url path generator but none worked:

url_for [Hr::Employee.new, Hr::Skill.new]
NoMethodError: undefined method `hr_employee_hr_skills_url' for main:Object

Also this:

url_for [:hr, Hr::Employee.new, Hr::Skill.new]
NoMethodError: undefined method `hr_hr_employee_hr_skills_url' for main:Object

I just need #url_for to call hr_employee_skills_path(employee, skill) so that it resolves to the actual route. How could that be possible?

Answer 1

Check out the link, but there is an option for the module that you can use to help with this:

module Hr
  def self.use_relative_model_naming?
    true
  end
end

This then allows for this:

url_for([:hr, Hr::Employee.first, Hr::Skill.first, only_path: true])
 => "/hr/employees/1/skills/1"

https://coderwall.com/p/heed_q/rails-routing-and-namespaced-models