rails 4，collection_select，将多个属性传递到表单提交的params哈希中？

Question

I'm using collection_select to select an option from a drop down. When I submit the form I want to send multiple params into the params hash. In this case 'team_id' and 'team_name'. team_id is showing up in the params hash just fine. 'team_name' is the value which shows up in the drop down list itself.

view.html.erb

  <%= form_for @carpool do |f| %>
    <h3>Select Team</h3>
    <div class="form-group">
        <%= f.collection_select :team_id, @ts_teams ? @ts_teams : [], :id, :name, include_blank: true %>
    </div>
      <%= f.submit 'Create Carpool', :class => 'button left' %>
  <% end %>

params hash

{"utf8"=>"✓", "authenticity_token"=>"bdazhLNLZ0QunrpJT7Gu63ipX76WME+ENSxL/B0XGeFL/GP5nishozmQENe22aelfcnnhnPBr4B35MeRL+kJLQ==", "carpool"=>{"team_id"=>"1923565"}, "commit"=>"Create Carpool", "controller"=>"carpools", "action"=>"create"}

How can I pass team_name into the params hash?

Answer 1

You can get what you want without jumping through flaming hoops by just creating an instance of Team (which you are probably already doing anyhow) and just getting the name directly.

In your controller method:

@team = Team.find(params[:team_id])
@team_name = @team.name