Rails + Bootstrap; disable if date is past

Question

I have the following in my view:

<td><%= check_box_tag 'checked_in', registration.id , registration.checked_in, :class => "check-in" %></td>

This particular check box is used to check students in, and indicates whether a student showed up for a class or not. I would like the button disabled after the class date has past. So it would look something like:

  <td><%= check_box_tag 'checked_in', registration.id , registration.checked_in, :class => "check-in",
if @orientation.class_date > Date.today then :disabled => "disabled" end %></td>

I get a syntax error "expecting keyword_end" with the above code.

Use [ternary operator](http://stackoverflow.com/questions/4252936/how-do-i-use-the-conditional-operator-in-ruby) — Roman Kiselenko, Jul 24 '14 at 18:28
Yes, this works: <%= check_box_tag 'checked_in', registration.id , registration.checked_in, :disabled => @orientation.class_date < Date.today ? true : false, :class => "check-in" %> — Mark Locklear, Jul 24 '14 at 18:36

score 3 · Accepted Answer · answered Jul 24 '14 at 18:30

Remove the if statement and use this:

<td><%= check_box_tag 'checked_in', registration.id , registration.checked_in, 
:class => "check-in", disabled: (@orientation.class_date > Date.today) %></td>

When @orientation.class_date > Date.today, check box would be in disabled state otherwise enabled.

score 1 · Answer 2 · answered Jul 24 '14 at 18:34

You can also use a helper method

def check_for_disable(orientation)
  true if orientation.class_date > Date.today
end


<td>
  <%= check_box_tag 'checked_in', registration.id , registration.checked_in, :class => "check-in", :disabled => check_for_disable(@orientation)%>
</td>

Rails + Bootstrap; disable if date is past

2 Answers2