title: laravel foreign key column naming convention
body: <p>I have a <code>LessonGroup</code> model and its tabel name is <code>lesson_groups</code> . if i want to use this table <code>id</code> in another tabel as a foreign key, what column name should i select that Laravel could distinguish it automatically as a <a href="https://laravel.com/docs/5.2/eloquent-relationships#one-to-one" rel="nofollow">foreign key</a> to <code>lesson_group</code> table?</p>
  
  <pre><code>lesson_groups
     id
     name
   -----------------------------------------
  fields
    id
    //foreign key to lesson_groups(what should be the name of this column?)
    name
  </code></pre>