Adds a permission to log time for another user (#3848).

Patch by Marius BALTEANU.

git-svn-id: http://svn.redmine.org/redmine/trunk@17755 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20180501132547_add_author_id_to_time_entries.rb

@@ -0,0 +1,11 @@
+class AddAuthorIdToTimeEntries < ActiveRecord::Migration[5.1]
+  def up
+    add_column :time_entries, :author_id, :integer, :default => nil, :after => :project_id
+    # Copy existing user_id to author_id
+    TimeEntry.update_all('author_id = user_id')
+  end
+
+  def down
+    remove_column :time_entries, :author_id
+  end
+end