add methods to submitter in user model

app/models/role.rb

@@ -41,5 +41,9 @@ class Role < ApplicationRecord
   def self.supervisor
     find_by(name: 'supervisor') || create!(name: 'supervisor')
   end
+
+  def self.submitter
+    find_by(name: 'submitter') || create!(name: 'submitter')
+  end
   
 end

app/models/user.rb

@@ -120,6 +120,13 @@ class User < ApplicationRecord
     false
   end
 
+  def is_submitter?
+    roles.each do |role|
+      return true if role.name == 'submitter'
+    end
+    false
+  end
+
   def can_edit?
     self.is_admin? || self.is_editor?
   end