facing issues in enum field in rails4

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!

Shouldn't it be `Employee.role`? I don't think attributes are pluralized by Rails. — steve klein, May 13 '15 at 11:52

score 2 · Answer 1 · edited May 23 '17 at 11:51

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.

score 0 · Answer 2 · answered May 13 '15 at 12:07

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]] }) %>

score 0 · Accepted Answer · answered May 14 '15 at 06:06

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!!

facing issues in enum field in rails4

3 Answers3