Some correction of column names.

Support for internal as well as external users. Added column user_type and used it where necessary

db/migrate/20150818141554_add_user_type_to_request_for_comments.rb

@@ -0,0 +1,5 @@
+class AddUserTypeToRequestForComments < ActiveRecord::Migration
+  def change
+    add_column :request_for_comments, :user_type, :string
+  end
+end

db/migrate/20150818142251_correct_column_names.rb

@@ -0,0 +1,7 @@
+class CorrectColumnNames < ActiveRecord::Migration
+  def change
+	rename_column :request_for_comments, :requestorid, :requestor_user_id
+  	rename_column :request_for_comments, :exerciseid, :exercise_id
+  	rename_column :request_for_comments, :fileid, :file_id
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150421074734) do
+ActiveRecord::Schema.define(version: 20150818142251) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -171,12 +171,13 @@ ActiveRecord::Schema.define(version: 20150421074734) do
   add_index "internal_users_teams", ["team_id"], name: "index_internal_users_teams_on_team_id", using: :btree
 
   create_table "request_for_comments", force: true do |t|
-    t.integer  "requestorid",  null: false
-    t.integer  "exerciseid",   null: false
-    t.integer  "fileid",       null: false
+    t.integer  "requestor_user_id", null: false
+    t.integer  "exercise_id",       null: false
+    t.integer  "file_id",           null: false
     t.datetime "requested_at"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "user_type"
   end
 
   create_table "submissions", force: true do |t|