Is it bad to save data as ActionController::Parameters in a postgres DB with Rails?

Here is the situation. I use facebook login and want to save the array of friends into my rails server with a postgres database.

The params coming in for the fb_friends are:

"fb_friends"=>[{"id"=>"1381984758791468", "name"=>"ios ipod"}]

Api controller strong parameters: user_params has fb_friends: [:id, :name]

In the User model, I serialize fb_friends.

serialize :fb_friends

All this work but I notice that the class type for my fb_friend is ActionController::Parameters and it behaves like a Hash. Is this a bad thing?

In Rails console,

u.fb_friends.first.class
 => ActionController::Parameters

u.fb_friends.first[:id]
 => "1381984758791468"

u.fb_friends.first[:name]
 => "ios ipod"