f.select Not accepting values

Question

I am using f.select here for these mark up values.

They appear in the drop down but when the form is submitted the value of 1.00 is displayed for any user's choice:

    <div class="field">
    <%= f.label :mark_up %><br>
    <%= f.select :mark_up, options_for_select([[1.00],[1.10],[1.15],[1.20],                    
    [1.25],[1.30],[1.35],[1.40],[1.45],[1.50]],:selected => params[:mark_up]) %> </div>

Answer 1

Try this:

<%= f.select(:mark_up, options_for_select([[1.00],[1.10],[1.15],[1.20],                    
[1.25],[1.30],[1.35],[1.40],[1.45],[1.50]], selected: :mark_up )) %>

See this link for more info on rails form helpers - options for select

Answer 2

Please the docs for options_for_select() for usage examples. You can use of both ways:

<%= f.select :mark_up, options_for_select([1.00, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50], :selected => f.object.mark_up)

or

<%= f.select :mark_up, options_for_select([1.00, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50], f.object.mark_up)