How to validate a role with devise gem? - ruby-on-rails

Question

Im trying to validate a enum with the gem devise, but it doesn't save in my active record.
this is my model:
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :validatable
validates :full_name, presence: true
enum role: %i[admin_user regular_user]
end
this is my controller:
class ApplicationController < ActionController::Base
before_action :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
devise_parameter_sanitizer.permit(:sign_up) do |user_params|
user_params.permit({ roles:[] }, :full_name,:email, :password, :password_confirmation)
end
end
end
and this is my views:
Sign up
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= render "devise/shared/error_messages", resource: resource %>
<div class="field">
<%= f.label :email%><br />
<%= f.email_field :email, autofocus: true, autocomplete: "email" %>
</div>
<div class= "field">
<%= f.label :full_name %>
<%= f.text_field :full_name, autocomplete: "full_name"%>
</div>
<div class="field">
<%=f.label :roles %>
<%= f.select :role, collection: User.roles.keys.to_a %>
</div>
<div class="field">
<%= f.label :password %>
<% if #minimum_password_length %>
<em>(<%= #minimum_password_length %> characters minimum)</em>
<% end %><br />
<%= f.password_field :password, autocomplete: "new-password" %>
</div>
<div class="field">
<%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "new-password" %>
</div>
<div class="actions">
<%= f.submit "Sign up" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
What should i change to save the roles in active record?

Answer 1

You're whitelisting an array when you just need a single param:
protected
def configure_permitted_parameters
devise_parameter_sanitizer.permit(:sign_up) do |user_params|
user_params.permit(:role, :full_name,:email, :password, :password_confirmation)
end
end
You should also fix the view so that you're using the same argument for the label and input:
<div class="field">
<%= f.label :role %>
<%= f.select :role, collection: User.roles.keys.to_a %>
</div>
This is important for assistive technologies such as screenreaders so that they can properly link the label to the input via the for attribute.