Use Arrays within the check Box

Question

How can I pass a Array values to check box I have an Array say loan["1","2","3"] and in my view

 <%= check_box_tag "loan[]" ,c.id , true %> 

For the first time i select the ids and Ill save. But at the second time only selected ids(which i have selected for the first time) should be displayed and rest should be unchecked. Thanks in advance

Answer 1

You must pass two arrays into view - all loans and checked loans. And in 3rd check_box_tag parameter check their interseption, something like this:

<% @loans.each do |loan| %>
    <%= check_box_tag "loans[]", loan.id, @checked_loans.any? { |checked_loan| checked_loan.loan_id == loan.id } %>
<% end %>