How to add custom field to devise forgot my password? - ruby-on-rails

Question

Let me preface this with I am a Java developer, but my team is developing an SSO microservice for our product in rails so I am learning as I go.
Currently I have it setup to send a confirmation of password reset when a user enters their email into this form:
<%= form_for(resource, as: resource_name, url: password_path(resource_name), html: { method: :post }) do |f| %>
<%= devise_error_messages! %>
<div class="row">
<div class="medium-12 small-12">
<div class="field">
<%= f.label :email, class: 'field-label' %>
<%= f.email_field :email, autofocus: true %>
</div>
</div>
</div>
<div class="row">
<div class="actions columns medium-12 small-12">
<%= f.submit "Send", id: "send-button" %>
</div>
</div>
<div class="row text-center align-center">
<div class="small-8 small-centered columns">
<br><p id="form-subheading">* For security reasons, we do NOT store your password. We will NEVER send your password via email.</p>
</div>
</div>
<% end %>
And it successfully passes through the following function in the class Users::PasswordsController < Devise::PasswordsController
# POST /resource/password
def create
super
end
The problem is now we need to add the following first_name and last_name fields to the form, and authenticate it against the User model before sending form to their email, but it is ignoring those parameters entirely. Clearly I need a check somewhere, but have no idea where to begin.
<div class="row">
<div class="medium-5 small-12">
<div class="field">
<%= f.label :first_name, class: 'field-label' %>
<%= f.text_field :first_name %>
</div>
</div>
<div class="medium-6 medium-offset-1 small-12">
<div class="field">
<%= f.label :last_name, class: 'field-label' %>
<%= f.text_field :last_name %>
</div>
</div>
</div>
I know they get sent to the backend because the params[:user] variable contains the information if I put a byebug statement in the function. I am just unsure how to validate the new information in the form.
Any help on building custom fields for this form would be appreciated.

Answer 1

So of course, after looking for an hour I post to SO, and I immediately find what I need in the documentation.
Turns out I needed to:
# config/initializers/devise.rb
config.reset_password_keys = [:email]
and change it to
config.reset_password_keys = [:email, :first_name, :last_name]

Answer 2

In your user model you can validate those fields. Something like this:
validates :first_name, presence: true
validates :last_name, presence: true
After sending the form, in the model they are validated. If the first_name and/or last_name isn't filled in, it will return to the form. Read this for more information about rails validations
Also in your controller you have to accept the params (if you don't already).
def user_params
params.require(:user).permit(:first_name, :last_name)
end
In your user controller you probably already have the def user_params, just add the first_name and last_name to it.
after that you can access those params like you normally would. (ex: in the create function #user = User.new(user_params) and you'll have #user.first_name.)