How to call model method in rails controller

Question

Hi I have to call model method in my controller and view. So for this I had done this:

category.rb

def self.category_list
    category = self.all.collect { |m| [m.name, m.id] }
    return category
end

products_controller.rb

def new
    @product = Product.new
    @category = Category.category_list
end

and in products/new.html.erb

<%= form_for @product, action: "create", :html => {:class => "form-group"} do |f| %>
        <div class="fields">
          <%= f.label :model_name %>
          <%= f.text_field :model_name, :class => "form-control" %>
        </div>
        <div class="fields">
          <%= f.label :model_number %>
          <%= f.text_field :model_number, :class => "form-control" %>
        </div>
        <div class="fields">
          <%= f.label :model_number %>
          <%= f.select(:category_id, @category, :prompt => 'Select') %>
        </div>
        </br>
        <div class="actions">
          <%= f.submit "Submit", :class => "btn btn-success" %>
        </div>
<% end %>

whem am giving this it gives me error ActiveRecord::DangerousAttributeError in ProductsController#new Please guide how to solve this. Thanks in advance for help :)

Answer 1

use this gem:

gem 'safe_attributes'

then

bundle install

also see gem's documentation and you are done :)

Answer 2

Please change your model method writes this

def self.category_list
    Category.all.collect { |c| [c.name, c.id] }
  end

and you are using field model_name so just because of this its giving an error of Dangerous attributes error so please change it to name hope this will work.