Dynamic link_to path's | How to implement

[itsyoshio]

Feature request

Please elaborate on how to do dynamic link_to path
How would anyone implement a ViewComponent with a link_to for different ressources?

Motivation

I have a (Card)Component that i'd like to use for Customers and Locations.
Locations is a nested route under Customers.

So in turn, i'd have to sometimes

link_to customer_path(@card)

or, respectively

customer_location_path(@card.customer, @card)

Would it be better to

• sepeate Concerns (CustomerCardComponent; LocationCardComponent)
• give a path: object

or something else entirely?

Thanks :)

[boardfish]

Hi there @itsyoshio! I've converted this to a discussion. We tend to use issues for bug reports and feature requests, whereas implementation support is better suited to discussions.

If I'm understanding you correctly, @card refers to a Customer in the first instance and a Location in the second. Here's my suggestion as to what you could do here. Set this up in your config/routes.rb:

direct :location do |model|
  customer_location_path(model.customer, model)
end

This allows you to call location_path(@card)...and, more importantly, url_for(@card). You can now use url_for and pass it a customer or a location to get the desired result.

Alternatively, a method within your component that's as follows would do the trick:

def card_route
  @card.respond_to?(:customer) ? customer_location_path(@card.customer, @card) : customer_path(@card)
end

Which option you take really depends on a few things. If you're likely to use similar code for Customers and Locations at the controller level, I'd recommend adding that direct block to config/routes.rb. Otherwise, it should probably just be the concern of the component - and you may even want to make it an ActiveSupport::Concern if you use the idea across multiple components.

If you want your card component to be even more flexible, maybe the route could be something you pass in when you initialize the component:

def initialize(subject, route: nil)
  @subject = subject
  @route = route || default_card_route
end

def default_card_route
  @subject.respond_to?(:customer) ? customer_location_path(@subject.customer, @card) : customer_path(@subject)
end

If you wish, you could even do away with the default_card_route so that your cards don't have to link to anywhere. Of course, that all depends if it's what you want.

Hope that's helpful to you!