Place a link within a infowindow using gmaps4rails - ruby-on-rails

Question

I am using gmaps4rails and now when I click on a marker appears information from the database, I need a putting a link inside the marker. How do I?
Model:
def gmaps4rails_address
city
end
def gmaps4rails_infowindow
"<h4>#{city}</h4>"
end
Controller:
def index
#postos = Posto.all
#markers = Posto.all.to_gmaps4rails
#json = Posto.all.to_gmaps4rails do |posto, marker|
marker.json "\"id\": #{posto.id}"
end
respond_to do |format|
format.html # index.html.erb
format.json { render json: #postos }
end
end

Answer 1

I don't recommend you use the gmaps4rails_infowindow method: view details shouldn't be given at the model layer.
You should rather configure the infowindow in the controller, using a partial:
#json = Posto.all.to_gmaps4rails do |posto, marker|
marker.infowindow render_to_string(:partial => "/path_to/your_template", :locals => { needed_locales })
end
Details are in the gem's wiki. (you could even use js templates but it's not the question and it's explained in the wiki as well)

Answer 2

Here are two ways.
Directly in the controller:
hashes = Gmaps4rails.build_markers(collection) do |item, marker|
marker.infowindow(ActionController::Base.helpers.link_to(item.name ||= 'Name?',preplan_path(item)).html_safe)
marker.title item.name
marker.picture({
# :url => "/assets/building_icon.png",
:url => "/assets/text.png",
:width => 32,
:height => 32
})
marker.lat item.latitude
marker.lng item.longitude
end
And using a partial from the controller:
hashes = Gmaps4rails.build_markers(collection) do |item, marker|
marker.infowindow render_to_string(:partial => "/structures/info_window", :locals => { :structure => item})
And the partial can be whatever you like:
# view/structures/_info_window.html.haml
= link_to structure.name, [structure.preplan, structure]
- unless structure.longitude.nil?
%br
= link_to "Drive to?", "https://maps.google.com/maps?daddr=#{structure.latitude},#{structure.longitude}", target: "_blank"