Saving custom attribute to Order model in Spree eCommerce - ruby-on-rails

Question

I have added a custom field in my spree_orders table (let's call it custom_attribute).
I have added Spree::PermittedAttributes.checkout_attributes << [:custom_attribute] to my spree.rb initializer.
In my checkout process I have a custom form with the following code (html formatting has been removed):
<%= form_for #order do |alt_form| %>
<%= alt_form.label :custom_attribute, "Custom Attribute" %><span class="required">*</span><br />
<%= alt_form.text_field :custom_attribute, :class => 'form-control required', maxlength: 11 %>
<% end %>
This form successfully submits the field in the post request (full dump below) to http://localhost:3000/checkout/update/address as order[custom_attribute] xyz, however, the information is not saved to the model.
_method=patch
_method=patch
authenticity_token=Y+ATRotWKfI57f+b0/YGwIw9Bg6mADHBDmeEOHYzLPnB6Vbydya4ITDTopcX65EG+TiL7bwyJKQPpBU9bQTaUg==
authenticity_token=Y+ATRotWKfI57f+b0/YGwIw9Bg6mADHBDmeEOHYzLPnB6Vbydya4ITDTopcX65EG+TiL7bwyJKQPpBU9bQTaUg==
commit=Save and Continue
order[bill_address_attributes][address1]=123 Test
order[bill_address_attributes][address2]=
order[bill_address_attributes][city]=Test
order[bill_address_attributes][country_id]=232
order[bill_address_attributes][firstname]=Test
order[bill_address_attributes][id]=3
order[bill_address_attributes][lastname]=Test
order[bill_address_attributes][phone]=555555555
order[bill_address_attributes][state_id]=3535
order[bill_address_attributes][zipcode]=30024
order[email]=spree#example.com
order[custom_attribute]=2414
order[state_lock_version]=32
utf8=✓
utf8=✓
I've inserted #order.inspect on the following (payment) page to can see at that point that #order.custom_attribute is still nil.
Does anyone have any idea about what I need to do in order to get the custom_attribute value sent in the post request saved to the model with the other attributes sent?
-------------------edit-------------------
Default spree permitted attributes are defined here https://github.com/spree/spree/blob/3-0-stable/core/lib/spree/core/controller_helpers/strong_parameters.rb and are added on by the strong_paramaters helper here (don't have the rep to post a third link):
module Spree
module Core
module ControllerHelpers
module StrongParameters
def permitted_attributes
Spree::PermittedAttributes
end
delegate *Spree::PermittedAttributes::ATTRIBUTES,
to: :permitted_attributes,
prefix: :permitted
def permitted_payment_attributes
permitted_attributes.payment_attributes + [
source_attributes: permitted_source_attributes
]
end
def permitted_checkout_attributes
permitted_attributes.checkout_attributes + [
bill_address_attributes: permitted_address_attributes,
ship_address_attributes: permitted_address_attributes,
payments_attributes: permitted_payment_attributes,
shipments_attributes: permitted_shipment_attributes
]
end
def permitted_order_attributes
permitted_checkout_attributes + [
line_items_attributes: permitted_line_item_attributes
]
end
def permitted_product_attributes
permitted_attributes.product_attributes + [
product_properties_attributes: permitted_product_properties_attributes
]
end
end
end
end
end
which can be at found spree/core/lib/spree/core/controller_helpers/strong_parameters.rb in the spree github repo.
-------------------final edit-------------------
If anyone finds this in the future and is trying to troubleshoot a similar issue, my code above is actually correct; I had (stupidly) placed it in an if Rails.env.production? block.

Answer 1

I will give you an example, maybe you can translate it into your code.
OPTIONAL
Imagine that I have a custom action, called "custom" on my users controller, defined this way in my routes:
resources :users do
collection do
get 'custom'
post 'custom'
end
end
This way I can call it by using custom_users_path.
Next, I want a form that submits to that function, to do that you need to specify an additional parameter in your form_for called :url, in this example I call it using custom_users_path, once I submit the form, It will run my custom action.
form_for would look like this:
<%= form_for :user, :url => custom_users_path do |f| %>
<%= f.text_field :random %>
<%= f.submit "Submit" %>
<% end %>
Then, I want to be able to access some :random parameter in my users controller. Let's suppose that I have a text_field which I want store the value on my :random parameter (see above). First, you need to permit that parameter to be accessible in your controller, in this example, in users controller. This way:
params.require(:user).permit(YOUR PARAMETER HERE, {:random => []})
So, every time I submit the form, I can access the :submit parameter value, by doing this params["controller-name"]["parameter-name"], translated into this example, would look like:
params["user"]["random"]
You can then convert it into string using to_s if you want.
Output (Supposing that I wrote "444" on my text_field):
444
I hope this helps you.