Radio Button Helper - Default value

Question

I have a table rooms and I have a field type(Single, Double). I want to use a radio button for this field. So, I am using it like this:

<% form_for(@room) do |f| %>
  <%= f.radio_button :type, "Single" %>
  <%= f.radio_button :type, "Double" %>
<% end %>

This works fine for edit view. The problem is that for the new view, I want to default the radio button to "Single". For this code, no value is checked for the new view.

I am now adjusting that with condition check

<% form_for(@room) do |f| %>
  <%= f.radio_button :type, "Single", :checked => @room.new_or_single? %>
  <%= f.radio_button :type, "Double" %>
<% end %>

Room model

def new_or_single?
  type.nil? or type == "Single"
end

Is there a better way to achieve this?

You can set default value for type on 'single' in database schema or in the constructor. — taro
– taro, Commented May 3, 2011 at 10:19

Sector · Accepted Answer · 2011-05-03 10:56:49Z

11

Set default :type in constructor

def new
  @room = Room.new(:type => "Single")
end

answered May 3, 2011 at 10:56

Sector

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1 Comment

PhillipKregg Over a year ago

You also may want to consider changing your field name from 'type' to 'room_type'. The column name 'type' is a field that Active Record uses for inheritance. It may cause you problems later on: oldwiki.rubyonrails.org/rails/pages/MagicFieldNames

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