Add rails route helpers to a class as class methods
routes, ruby, ruby-on-rails
Solution
URL routes shouldn't generally need to be accessed from a model. Typically you should only need to access them from your controller when handling a request, or when rendering a view (if you're e.g. formatting a link URL).
So instead of asking your model object for the root path, you would simply call `root_path` from within your controller or a view.
Edit
If you're just interested in the reason why you're unable to include the module's method as class methods in your class, I would not expect a simple `include` to work, since that would include the module's methods as as instance methods in your class.
`extend` would normally work, but in this case it does not due to how the `url_helpers` method is implemented. From actionpack/lib/action_dispatch/routing/route_set.rb source
def url_helpers
@url_helpers ||= begin
routes = self
helpers = Module.new do
...
included do
routes.install_helpers(self)
singleton_class.send(:redefine_method, :_routes) { routes }
end
The `included` block containing the `routes.install_helpers(self)` call indicates that you will need to `include` the module in order to get the methods install (so `extend` is out).
The following should work if you call `extend` in the class context. Try this:
Class MyModel
class << self
include Rails.application.routes.url_helpers
end
end
Class.root_path
Problem
How can i add rails route helpers like "root_path" to a class like my_model.rb as a class method? So my class is like this: ``` Class MyModel def self.foo return self.root_path end end MyModel.foo ``` The above doesn't work because Class MyModel doesn't respond to root_path This is what I know: - I can use include `Rails.application.routes.url_helpers`, but that only add the module's methods as instance methods - I tried doing extend `Rails.application.routes.url_helpers` but it didn't work Please feel free to school me :)