facing issues in enum field in rails4 - ruby-on-rails

Question

Hi I have generated a migration to add_column rails g migration AddColumnToEmployees
class AddColumnToEmployees < ActiveRecord::Migration
def change
add_column :employees, :role, "enum('SUPER-ADMIN', 'HR','ADMIN','INVENTORY','EMPLOYEE')", :default => 'EMPLOYEE'
end
end
run rake db:migrate
Now I want to access role in my view for this I have written this:
<%=f.select :role, :collection => Employee.roles %>
But its not accessing it. It gives error
undefined method 'roles' for #<Class:0xc2acd88>
Please guide how to solve this. Thanks in advance!

Answer 1

I was under the impression you represented the enum as an integer in the DB, so your migration should be:
class AddColumnToEmployees < ActiveRecord::Migration
def change
# Assuming Employee is the first value in your enum list
add_column :employees, :role, :integer, default: 0
end
end
and your select should be:
<%= f.select :role, :collection => Employee.roles.keys.to_a %>
See Saving enum from select in Rails 4.1
Your model:
class Employee
enum role: [:employee, :inventory, :admin, :hr, :superadmin]
end
Rails does automatically provide you with all potential values through a class method with the pluralized attribute name.

Answer 2

your migration is fine. after your migration to access it in view like that
<%=f.select :role, :collection => Employee.roles.keys.to_a %>
and define enum field in model employee.rb
enum role: {
super_admin: 1,
hr: 2,
admin: 3,
inventory: 4,
employee: 5
}
convert in enum role of model into hash. and assign the value. and run it.i will try my best hope it will help you!!

Answer 3

Try following code, I hope this will help you.
in AddColumnToEmployees migration file.
class AddColumnToEmployees < ActiveRecord::Migration
def change
add_column :employees, :role, :integer, default: 0
end
end
in Employee Model.
class Employee
enum role: [ :super_admin, :hr, :admin, :inventory, :employee ]
end
and finally in view file.
<%= f.select :role, options_for_select(Employee.roles.collect { |e| [e[0].humanize, e[0]] }) %>