custom simple_form input date_flag - ruby-on-rails

Question

Trying to use f.input(:activated_at, as: :date_flag) to render as a checkbox, which sends down Time.now for true and nil for false.
https://github.com/postageapp/date_flag/blob/master/lib/date_flag.rb
https://raw.githubusercontent.com/heartcombo/simple_form/main/lib/simple_form/inputs/boolean_input.rb
# frozen_string_literal: true
class DateFlagInput < SimpleForm::Inputs::Base
def input(wrapper_options = {})
template.content_tag(:div, class: "form-check form-switch") do
template.concat(#builder.check_box(attribute_name, {class: 'form-check-input'}, Time.now, nil))
template.concat(template.label(attribute_name, label_text, {class: "form-check-label"}))
end
end
end
This code above gets me a bootstrap5 checkbox, which sends down the time, but cannot render a "checked".

Answer 1

I figured this out!
# frozen_string_literal: true
class DateFlagInput < SimpleForm::Inputs::BooleanInput
def input(wrapper_options = {})
flag_value = object.send(attribute_name)
# date_flag magic
input_html_options[:checked] = flag_value ? (flag_value <= Time.now) : false
merged_input_options = merge_wrapper_options(input_html_options, wrapper_options)
merged_input_options[:class] = [input_html_classes]
template.content_tag(:div, class: container_class_name) do
build_hidden_field_for_checkbox +
build_check_box_without_hidden_field(merged_input_options) +
#builder.label(label_target, label_text, {class: boolean_label_class})
end
end
def label_translation
if SimpleForm.translate_labels && (translated_label = translate_from_namespace(:labels))
translated_label
elsif object.class.respond_to?(:human_attribute_name)
object.class.human_attribute_name(reflection_or_attribute_name.to_s.gsub(/_at$/, ''))
else
attribute_name.to_s.gsub(/_at$/, '').humanize.titleize
end
end
def container_class_name
"form-check"
end
def label(wrapper_options)
template.label_tag(nil, ' '.html_safe)
end
def input_html_classes
'form-check-input'
end
def boolean_label_class
"form-check-label"
end
def checked_value
Time.now
end
def unchecked_value
0
end
end
adding the checked: option to show how the checkbox should render.
the unchecked_value cannot be nil because nil does gets excluded from the params. using nil or 0 both worked for the unchecked_value!