Don't know how your database is managed, but i'll surely create a separate table , which will have the following columns (In relationship , we create a middle tier ,which holds keys of 2 or more tables).

dynamicData Table ;)

table_id timestamps() - Created / Updated question_id - from Questions Table
comment_id - from Comment Table ratings_id - from Ratings Table user_id - If using user authentication ip/token - if collecting that info

I personally ensure proper relationship in tables via sql, but you can always create proper relationships in database design.

I do have a model for ratings, questions and comments. So for each model I have a database table. When I store the request

This is what I get back as request.

object(Illuminate\Http\Request)[40]
  ...
public 'request' => 
    object(Symfony\Component\HttpFoundation\ParameterBag)[41]
      protected 'parameters' => 
        array (size=30)
          '_token' => string 'MgMX95LUb3cwarkDI38UzxDKmnuzwgwF7XU5uZSK' (length=40)
          'professional' => string '1' (length=1)
          'questionId2' => string '5' (length=1)
          'commentId2' => string 'comment 1' (length=9)
          'questionId4' => string '3' (length=1)
          'commentId4' => string 'comment 2' (length=9)
          'questionId5' => string '8' (length=1)
          'commentId5' => string 'comment 3' (length=9)
          'questionId6' => string '8' (length=1)
          'commentId6' => string 'comment 4' (length=9)
          'questionId13' => string '8' (length=1)
          'commentId13' => string 'comment 5' (length=9)
          'questionId1' => string '4' (length=1)
          'commentId1' => string 'comment 6' (length=9)
          'questionId7' => string '6' (length=1)
          'commentId7' => string 'comment 7' (length=9)
          'questionId8' => string '7' (length=1)
          'commentId8' => string 'comment 8' (length=9)
          'questionId9' => string '8' (length=1)
          'commentId9' => string 'comment 9' (length=9)
          'questionId3' => string '6' (length=1)
          'commentId3' => string 'comment 10' (length=10)
          'questionId10' => string '10' (length=2)
          'commentId10' => string 'comment 11' (length=10)
          'questionId11' => string '7' (length=1)
          'commentId11' => string 'comment 12' (length=10)
          'questionId12' => string '5' (length=1)
          'commentId12' => string 'comment 13' (length=10)
          'questionId16' => string '6' (length=1)
          'commentId16' => string 'comment 14' (length=10)
...

This contain all the data I need to store. The questionId with the rating and the commentId which refer to the questionId and the value.

Thanks! I have a slightly modified version of your example but works fine. Thank you again!