Passing parameters on button click in Rails

问题

Right now, I have it so that when users pick an option from collection_select, a div is populated based on the event_id of their choice. Depending on the Event, there will be multiple EventOption shown, each with their own unique ids. (I have EventOption as belongs_to Event, each of which has_many of them.)

This is what I have populating via JS/Ajax when they select an Event:

<div class="center" >
  <h2>Available Options for "<%= @event.name %>":</h2>
    <% @event.event_options.each do |e| %>
      <p><strong>Name:</strong> <%= e.name %> </p>
      <p><strong>Description:</strong> <%= e.description %></p>
      <p><strong>Price:</strong> <%= e.price %></p>
</div>

<div class = "center row">  
  <div class = "col-xs-6">
      <%= link_to "Check Available Dates", root_path, :class => "button", :id => "available-dates-button" %>
  </div>
  <div class = "col-xs-6">
     <%= link_to "Book This Event Now!", book_now_path(:event => @event.id), :id => "book-now-button", :class => "button" %>

  </div>    
      <hr>
    <% end %>
 </div>

My issue is that I can pass the event_id when they click the Book This Event Now!, but that's not what I need. I need the specific :id of the :event_option to be passed over, and I don't know how to get it from the iterated .each I have it coming from.

How can I make sure that each iteration of a button that follows my book_now_path has a unique ID that I can use to complete their reservation?

回答1:

Just add the event_option.id to your book_now_path helper.

book_now_path(:event => @event.id, :event_option_id => e.id)

Then in the controller action it will be in the params:

@event_option_id = params[:event_option_id]

You can add any additional parameters to the Rails routes helpers simply by adding their names and values as keys and values to the helper method's options.

来源：https://stackoverflow.com/questions/39046857/passing-parameters-on-button-click-in-rails