Rails 3, checked radio button with if function

Question

I have a radio button within my form as follows

    <div class="btn-group" data-toggle="buttons-radio">
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2007' %> 2007
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2008' %> 2008
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2009' %> 2009
    </div>

I am using twitter bootstrap

I want to do something like the following:

    <div class="btn-group" data-toggle="buttons-radio">
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2007', if @dates.start_year == 2007 :checked => true end %> 2007
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2008', if @dates.start_year == 2008 :checked => true end %> 2008
      <%= f.radio_button :start_year, :class=> "btn", :value=> '2009', if @dates.start_year == 2009 :checked => true end %> 2009
    </div>

But I get the following error:

syntax error, unexpected keyword_ensure, expecting ')'
syntax error, unexpected keyword_end, expecting ')'

I must be making a mistake in the if statement within the radio button, but I'm not sure how exactly to correct this

bensiu · Accepted Answer · 2012-11-03 11:34:55Z

2

Try

<%= f.radio_button :start_year, :class=> "btn", :value=> '2007', :checked => Proc.new { @dates.start_year == 2007 ? true : false } %> 2007

edited Nov 3, 2012 at 11:34

bensiu

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answered Nov 3, 2012 at 11:15

BvuRVKyUVlViVIc7

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Comments

roman-roman · Accepted Answer · 2014-04-15 13:11:04Z

2

I know this is an old question, but maybe it helps others. I don't think we need Proc here, we can just pass boolean value to :checked key. Also, @dates.start_year == 2007 ? true : false can be simplified to @dates.start_year == 2007.

So, the result will be as simple as

<%= f.radio_button :start_year, :value=> '2007', :checked => @dates.start_year == 2007%> 2007

answered Apr 15, 2014 at 13:11

roman-roman

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1 Comment

JosephK Over a year ago

Note - if you are using a tag (instead of f.), they used different syntax (so you have yet another 'magic' pattern to try to memorize). So for a radio button tag, leave off the ":checked => " and just put a boolean test as the 3rd argument - so: ... radio_button_tag :start_year, :value=> '2007', (@dates.start_year == 2007)

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