CODEWITHSUNDEEP
ruby-on-railsformsdropdown
user3348410
user3348410

Reputation: 2833

How to dropdown select in rails form

how to do dropdown select in rails form ?

i tried to 

<div class="field">
     <%= f.label :car_id %>
    <%= select("car", "car_id", @cars) %>
  </div>

  <div class="field">
    <%= f.label :firstname %>
    <%= f.text_field :firstname %>
  </div>

  <div class="field">
    <%= f.label :lastname %>
    <%= f.text_field :lastname %>
  </div>

  <div class="field">
    <%= f.label :dateofbirth %>
    <%= f.date_select :dateofbirth %>
  </div>

but i get this error 

undefined method `empty?' for nil:NilClass

at this line. 

  <%= select("car", "car_id", @cars) %>

Upvotes: 2

Views: 7792

Answers (1)

Arun Kumar Mohan
Arun Kumar Mohan

Reputation: 11915

Try

<%= f.select :car_id, @cars.collect { |car| [car.name, car.id] } %>

You need to set the @cars instance variable in the controller method for the above line of code to work.

I am assuming that car has a name field. Replace name with a field of your Car model that is good enough for a label.

For every option in the selectlist, name will be set as the label and id will be set as the value.

For more, read the documentation here

Upvotes: 2

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