how to add roles to my users in rails app?

Question

I have a simple app with an authentication system from devise. I tried adding roles to the user model. But nothing happens.

what i did was created the Role model

Answer 1

First of all, instead of using an association, you can use enum in your user class:

class User < ActiveRecord:Base
   enum role: {seller: 0, buyer: 1, admin: 2}

   ... 
end

You'll need a migration to add a role (integer) column into your user's table.

In your terminal:

rails g migration add_role_to_users

Then edit the migration file:

class AddRoleToUsers < ActiveRecord::Migration
   def change
      add_column :users, :role, :integer
   end
end

Then you can e.g. use the SimpleForm gem to let the user choose his/her role during sign up:

<%=  simple_for for @user do |f| %>
   ...
   <%= f.select :role, collection: User.roles.keys.to_a %>
   ... 
<% end %> 

But SimpleForm is also good with associations:

<%= f.association :role, as: :radio_buttons %>

There are more examples for associations here.