Rails -- How to write a link which will be called to call a action with a parameter in controller ?

Question

Example, in my controller:

class GymController < ApplicatoinController
  def store(page)
     ...
  end
end

And now, I want call this action by a link in gym.html.slim:

- a ...

but how to call it by link format, and how to write route.rb file?

Answer 1

The answer depends on whether your store page belongs to a single Gym object OR to a collection of it:

For a single object

# app/controllers/gym_controller.rb
class GymController < ApplicatoinController
  before_action :fetch_gym

  def store
    # ...
  end

  private

  def fetch_gym
    @gym = Gym.find(params.require(:id))
  end
end

# config/routes.rb
resources :gyms, only: [] do
  get :store, on: :member
end

# gym.html.slim
= link_to 'Store', store_gym_path(@gym)

For a collection

# app/controllers/gym_controller.rb
class GymController < ApplicatoinController
  def store
    # ...
  end
end

# config/routes.rb
resources :gyms, only: [] do
  get :store, on: :collection
end

# gym.html.slim
= link_to 'Store', store_gym_path

Read more on link_to and routing here.