rails3 - check_box_tag - how to make a Conditional Disabled

问题

Given the following Rails 3 check_box_tag

<%= check_box_tag 'XXXXXXX', 'true', true, (@setting.archived == true, :disabled =>  ?  true : false ) %>

How do I make the disabled setting conditional on @setting.archived ?

Any ideas?

Thanks

回答1:

You've nearly got something that'll work. Try:

<%= check_box_tag 'XXXXXXX', 'true', true, :disabled =>  (@setting.archived ?  true : false ) %>

remembering that (test ? a : b) is a single expression evaluating to a if test is true, and b if it's false.

回答2:

To shorted Chowlett's answer, you can just do:

<%= check_box_tag 'XXXXXXX', 'true', true, :disabled =>  @setting.archived %>

来源：https://stackoverflow.com/questions/4721365/rails3-check-box-tag-how-to-make-a-conditional-disabled