Active Admin checkboxes not selected when edit model - ruby-on-rails

Question

I'm using a custom collection to display checkboxes with schedule. It saves, but when I try to edit it returns to me unchecked. Why?
f.inputs for: :schedule, name: 'Employee Schedule' do |sf|
sf.input :sunday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :monday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :tuesday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :wednesday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :thursday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :friday, as: :check_boxes, collection: available_hours, method: :to_s
sf.input :saturday, as: :check_boxes, collection: available_hours, method: :to_s
end
def available_hours
(0..23).map { |h| ["#{h}h às #{h.next}h", h] }
end
helper_method :available_hours

Answer 1

I found a solution for this question
My collection remains unaltered
def available_hours
Array(0..23)
end
And my form will have a :member_label parameter receiving a Proc that will change it after collection already gathered
member_label: Proc.new { |h| "#{h}h às #{h.next}h" }
After modifications:
sf.input :sunday, as: :check_boxes, collection: available_hours, member_label: Proc.new { |h| "#{h}h às #{h.next}h" } , method: :to_s
and so on...

Answer 2

You need to determine which checkbox is selected like this: ["#{h}h às #{h.next}h", h, :selected]
def available_hours(_h)
(0..23).map { |h| ["#{h}h às #{h.next}h", h, h == _h ? :selected : ''] }
end
sf.input :sunday, as: :check_boxes, collection: available_hours(sh.object.sunday), method: :to_s
...or something similar.

Answer 3

It could be a different situation/need, but I think what I did for one of my project is possible a solution. I created a custom FormStatic input class that can be used for an ActiveAdmin edit form.
module ActiveAdmin
module Inputs
class ProductsInput < ::Formtastic::Inputs::CheckBoxesInput
def choice_html(choice)
html_options = label_html_options.merge(
:for => choice_input_dom_id(choice),
:class => checked?(choice[1]) ? 'checked' : nil
)
template.content_tag(:label, choice_label(choice), html_options)
end
def collection
super.sort {|a, b| a[0] <=> b[0]}
end
def choice_label(choice)
name, id = choice
product = Product.find(id)
name = ''
name << template.content_tag(:span, product.human_state_name, class: 'status_tag important') + ' ' unless product.on_sale?
name << product.name
(hidden_fields? ?
check_box_with_hidden_input(choice) :
check_box_without_hidden_input(choice)) + \
template.image_tag(product.listing.thumb, width: 60).html_safe + \
template.content_tag(:span, name.html_safe, class: 'choice_label')
end
end
end
end
Then you can use it in an edit block like this:
ActiveAdmin.register Collection do
form do |f|
f.inputs 'Products' do
f.input :products, as: :products
end
end
end
Collection has_many products through collection_products.