check_box_tag always checked

rubyonrails-talk
1 
#check_box and #check_box_tag are going to be the end of me. Why is this always checked?

<% checked = @reservation.selected ? 'checked' : nil %>
<td><%= check_box_tag("reservation[" + @
reservation.id.to_s + "][selected]", 'checked', :checked => checked) %></td>
2

I figured it out

<% checked = (@reservation.selected == 'checked') ? 'checked' : nil %>
<td><%= check_box_tag("reservation[" + @reservation.id.to_s + "][selected]", 'checked', checked) %></td>

@reservation.selected being 0 or ‘checked’ still returns true, which sets checked to ‘checked’ no matter what

3

Well, first, you don’t need the :checked => checked. Whether it is checked or not is determined by the third argument being true or false.

This will be named “check_box”, will have id “check_box”, a value of 1, and will be checked:

check_box_tag(:checked_box, 1, true)

This is the same as above, but won’t be checked

check_box_tag(:checked_box, 1, false)

Does this help?

Ryan Angilly wrote:

4

Yeah I was confused because I had looked at the source for the method, and I knew what you just said, but checked was evaluating improperly. Which made me think I misunderstood the method source. So I went looking around and found examples talking about using “:checked => …” and screwed me up even further.

Thanks