ruby on rails - Custom devise controller not working -

i have 2 models resident , user. both of them contains roll_number attribute, have entered data in resident model want, when user register devise resource checks if resident there of same roll_number in resident model? , user can registered !! added attribute (roll_number) devise's user model, edited create method of registrations controller here's code of :

class users::registrationscontroller < devise::registrationscontroller  before_action :configure_sign_up_params, only: [:create]  before_action :configure_account_update_params, only: [:update]    # /resource/sign_up   # def new   #   super   # end    def create     super     resident = resident.find_by(roll_number: params[:roll_number])     if resident.present?       @user = resident.create_user(params)       if @user.save         flash[:info] = "welcome messpay"         redirect_to root_url       else         render 'new'       end     else       flash[:danger] = "you have entered worng roll number or not resident"       redirect_to new_user_registration     end    end    # /resource/edit   # def edit   #   super   # end    # put /resource   # def update   #   super   # end    # delete /resource   # def destroy   #   super   # end    # /resource/cancel   # forces session data expired after sign   # in expired now. useful if user wants   # cancel oauth signing in/up in middle of process,   # removing oauth session data.   # def cancel   #   super   # end    # protected      def configure_sign_up_params      devise_parameter_sanitizer.permit(:sign_up, keys: [:roll_number,:resident_id])    end    # if have params permit, append them sanitizer.    def configure_account_update_params      devise_parameter_sanitizer.permit(:account_update, keys: [:roll_number,:resident_id])    end    # path used after sign up.   # def after_sign_up_path_for(resource)   #   super(resource)   # end    # path used after sign inactive accounts.   # def after_inactive_sign_up_path_for(resource)   #   super(resource)   # end end 

but code isn't working , getting when feeling form:

here's form code:

<% provide(:title, 'sign free messpay account') %> <div class="row">   <div class="col-xs-5 col-xs-offset-2" style="margin-top: 10%">     <%= image_tag("signup.jpg", alt: "thapar",width:"475",height: "331",class:"img-responsive") %>    </div >   <div class="col-xs-5" id="signup_form" style="margin-top: 10%">     <%= image_tag("messpay.gif", alt: "messpay",height: "38",width: "120") %>      <p style="font-size:30px;font-weight:100;"> create account </p>  <%= form_for(resource, as: resource_name, url: registration_path(resource_name)) |f| %>   <%= devise_error_messages! %>         <p style="font-size: 0.87em">messpay account <%= link_to "what's this?","#" %></p>   <%= f.text_field :roll_number, class:'form-control',placeholder:"roll number" %>    <%= f.email_field :email, class:'form-control',placeholder:"email" %>    <%= f.password_field :password, class:'form-control',placeholder:"password"%>    <%= f.password_field :password_confirmation, class: 'form-control',placeholder:"password confirmation"%>    <%= f.submit "create account", class: "btn btn-primary" %>   <% end %>   <p style="margin-top: 10%;color: gray;">already have messpay account<span onclick="opennav()"style="color:#0c90db;cursor:pointer;"> login here !!</span></p>   </div> </div> 

am using params ? can't understand eaxctly why happening !

i think should put below code in appliction_controller.rb

before_action(:configure_permitted_parameters, if: :devise_controller?)   def configure_permitted_parameters     devise_parameter_sanitizer.for(:sign_up) << [:roll_number,:resident_id]]     devise_parameter_sanitizer.for(:account_update) << [:roll_number,:resident_id]] end 

hope you