Removed Unit.group, added UnitsController#import

app/controllers/units_controller.rb

@@ -1,5 +1,5 @@
 class UnitsController < ApplicationController
-  before_action :find_project, only: [:new, :index, :create]
+  before_action :find_project, only: [:new, :index, :create, :import]
   before_action :authorize
 
   def new
@@ -16,6 +16,9 @@ class UnitsController < ApplicationController
   def destroy
   end
 
+  def import
+  end
+
   private
 
   # :find_* methods are called before :authorize,

app/helpers/units_helper.rb

@@ -1,6 +1,2 @@
 module UnitsHelper
-  def group_options
-    translations = t('.groups')
-    Unit.groups.map { |k,v| [translations[k.to_sym], k] }
-  end
 end

app/models/unit.rb

@@ -1,30 +1,6 @@
 class Unit < ActiveRecord::Base
   belongs_to :project
 
-  # https://en.wikipedia.org/wiki/International_System_of_Units
-  enum group: {
-    number: 0,
-    share: 1,
-
-    length: 10,
-    mass: 11,
-    time: 12,
-    temperature: 13,
-
-    volume: 20,
-    density: 21,
-    ndensity: 22,
-
-    frequency: 30,
-    velocity: 31,
-    flow: 32,
-
-    energy: 30,
-
-    pressure: 40
-  }
-
   validates :project, associated: true
   validates :name, :shortname, presence: true
-  validates :group, inclusion: groups.keys
 end

app/views/units/_form.html.erb

@@ -6,8 +6,7 @@
       <p><%= f.text_field :shortname, required: true, size: 10 %></p>
     </div>
     <div class="splitcontentright">
-      <p><%= f.select :group, group_options, required: true %></p>
+      <p><%= f.text_field :name, required: true, size: 40 %></p>
     </div>
   </div>
-  <p><%= f.text_field :name, required: true, size: 40 %></p>
 </div>