rails, simple_form, how to set selected index of a collection when page loaded?

58
votes

I am using simple_form gem, I have a countries collection, it work fine when I select the country, and updated record will have the country id stored, but, when I try to edit the record, the chosen country is not selected by default at edit form.

Here is the code at edit form:

= f.input :country_id, :collection => all_countries

Shouldn't simple_form view the selected country from the db ?

2
ruby-on-railsruby-on-rails-3simple-form
> Shouldn't simple_form view the selected country from the db ? It should because simple_form is just a wrapper around rails' form_for helpers. Check your generated html to see if there's no selected option in the code. – Ineu
I think it would be helpful if this question didn't use the term "default". When I see that I think that you're talking about what the selected item would be when you have selected nothing before, not when you had stored something and come back to the page. – cesoid
yea, I've fixed it, but the question got bit longer :) – simo
See stackoverflow.com/questions/6477942/… – mdwpilot

2 Answers

135
votes

Have you tried to use the :selected => option?

:selected => selected_country_id

So,

= f.input :country_id, :collection => all_countries, :selected => selected_country_id

This will work perfectly !!!

Cheers!

15
votes

I know this has been answered, but I came here looking for a similar solution for a collection of check boxes. For posterity, here's how you do it:

<%= f.input :country_ids, :as => :check_boxes, :collection => [['USA', :USA], ['Japan', :JPN]], :checked => [:JPN], :include_hidden => false %>

Hope this helps someone.