uninitialized constant Degree(error) - ruby-on-rails

Question

I am getting the error uninitialized constant Degree. I have a column in database with column name type. When i give data to that field and save, the data i gave is getting saved in database but error message is displayed after that and i am not able to reload that page.
Controller code
class ProfileController < ApplicationController
before_action :set_user, only: %i[index update_profile]
def index; end
def update_profile
if #user.update(user_params)
redirect_to profile_index_path, notice: 'Profile was successfully updated.'
else
render :index
end
end
private
def set_user
#user = User.find(current_user.id)
#user.education || #user.build_education
end
def user_params
params.require(:user).permit(:name, education_attributes: %i[id type name issue_institute education_status])
end
end
education.rb
class Education < ApplicationRecord
belongs_to :user
validates_presence_of :user_id
end
user.rb
class User < ApplicationRecord
has_one :education, dependent: :destroy
accepts_nested_attributes_for :education
end
View code
<%= form_for(#user, url: {action: 'update_profile'}, html: {class: 'm-form m-form--fit m-form--label-align-right'}) do |f| %>
<%= f.fields_for :education, #user.education do |e| %>
<%= e.select :type, options_for_select(%w(Degree Certification), params[:type]), prompt: 'Degree/Certification', class: 'form-control m-input' %>
<%= end %>
<%= f.submit 'Save Changes'%>
<%= end %>
Terminal Log when i save that field
Started PATCH "/profile/update_profile" for 127.0.0.1 at 2018-05-30 09:04:37 +0530
Processing by ProfileController#update_profile as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"9QiEdSxqwkhHqZHiraiQjJcUvUS+oJknYjYaxWUSQrh+je0ASeYQvs//Z+p+oZkOqyAiwxc3nsxp/iohO9B1BA==", "user"=>{"name"=>"Admin", "email"=>"admin#gmail.com", "address_attributes"=>{"area"=>"5, nehru Street", "city"=>"pune", "state"=>"mumbai", "country"=>"india", "postcode"=>"626781", "id"=>"1"}, "education_attributes"=>{"type"=>"Degree", "name"=>"ffgxh", "issue_institute"=>"", "education_status"=>"", "id"=>"1"}, "fee_attributes"=>{"fee_hour"=>"", "fee_month"=>"", "id"=>"1"}}, "commit"=>"Save Changes"}
User Load (0.3ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 2 ORDER BY `users`.`id` ASC LIMIT 1
User Load (0.2ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1
Address Load (0.2ms) SELECT `addresses`.* FROM `addresses` WHERE `addresses`.`user_id` = 2 LIMIT 1
Fee Load (0.2ms) SELECT `fees`.* FROM `fees` WHERE `fees`.`user_id` = 2 LIMIT 1
Education Load (0.2ms) SELECT `educations`.* FROM `educations` WHERE `educations`.`user_id` = 2 LIMIT 1
Unpermitted parameter: :email
(0.2ms) BEGIN
SQL (0.4ms) UPDATE `educations` SET `type` = 'Degree', `updated_at` = '2018-05-30 03:34:37' WHERE `educations`.`id` = 1
(5.3ms) COMMIT
Redirected to http://localhost:3000/profile
Completed 302 Found in 19ms (ActiveRecord: 7.1ms)
Started GET "/profile" for 127.0.0.1 at 2018-05-30 09:04:37 +0530
Processing by ProfileController#index as HTML
User Load (0.7ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 2 ORDER BY `users`.`id` ASC LIMIT 1
User Load (0.3ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1
Address Load (0.4ms) SELECT `addresses`.* FROM `addresses` WHERE `addresses`.`user_id` = 2 LIMIT 1
Fee Load (0.3ms) SELECT `fees`.* FROM `fees` WHERE `fees`.`user_id` = 2 LIMIT 1
Education Load (0.8ms) SELECT `educations`.* FROM `educations` WHERE `educations`.`user_id` = 2 LIMIT 1
Completed 401 Unauthorized in 12ms (ActiveRecord: 2.4ms)
NameError - uninitialized constant Degree:
app/controllers/profile_controller.rb:41:in `set_user'
Data gets saved but i have error page after that. Can someone help me with it? Thanks in advance.

Answer 1

I am posting my comment as an answer so that anyone can reference that in future:
type is a reserved keyword for AR. Check list of reserve active record keywords from here. Change the column name. It will resolve the error.