Rails instance variables in .js.erb file

Question

I have a controller action like this. itineraries_controller.rb

def delete_city
  @new_itinerary = params[:new_itinerary] if params[:new_itinerary].present?
  @step = params[:step]
  if @step == 'two'
    @city = City.find(params[:id])
    @delete_rec = true
  else  
    @city_item = CityItem.find(params[:id]) rescue nil
  end  
  if @city_item.present?
    @itinerary = @city_item.country_item.itinerary rescue nil
    @itinerary = Itinerary.unscoped.find(params[:data_id])
    if (@itinerary.present? and @itinerary.user_id == current_user.id) or (current_user.moderator?)
      @country_item = @city_item.country_item
      @city_item.destroy
      @country_item.update_column('city_ids', @country_item.city_items.order(:sequence).pluck(:city_id))
      @delete_rec = true
    end
  end
  respond_to do |format|
    if @delete_rec && @step != 'two'
      format.js {render 'step_two.js.erb'}
    elsif @delete_rec && @step == "two"
      format.js {render 'delete_city_step_2.js.erb'}    
    else
      format.js {render :text => 'fail'}
    end
  end
end

And js.erb like this:

delete_city_step_2.js.erb

a = $('a.cityCrossBtn[for='+"<%= @city %>"+']')
li = a.closest('.token-input-token-facebook')
li.hide();

I am not able to find a element. What is the correct syntax?

Arslan Ali · Accepted Answer · 2016-05-16 09:45:48Z

2

@city will give you an instance of ActiveRecord::Base class, and I think it's something you aren't expecting in your .js.erb file. You may be wanting an attribute related to that instance like id or name, and you can accomplish that by writing the following code:

a = $('a.cityCrossBtn[for='+"<%= @city.id  %>"+']')

answered May 16, 2016 at 9:45

Arslan Ali

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