Rails 4 Integer number field returns string

Question

When I enter something into a number_field and post the form to the controller, Rails can't save because i have a numericality validation:

validates :rating, numericality: { greater_than: 0, less_than: 6 }

I debugged the controller by this piece of code:

raise "It exploded into pieces!" unless @comment.save

The exception I used for debugging said that my :rating was a string instead of an integer. Before this, i rendered the json errors for @comment and that said that :rating was not a number.

These are very useful to spot the problem, but I can't find any solutions to fix the problem. I checked the database schema and it says that :rating should be an integer, as in:

 t.integer  "rating"

I don't know what to do at this point. Can somebody help me? Thank you in advance.

P.S. I use number_field.

P.P.S. In my controller:

def ccreate
  @comment = Comment.new(params.permit(:rating, :body, :name, :game_id))
  raise "It exploded into pieces!" unless @comment.save
end

In my view:

<% if @comments.count < 10 %>
    <%= form_for(comment_path) do |f| %>
      <div class="field">
        <%= f.label :rating %><br>
        <%= f.number_field :rating %>
      </div>
      <div class="field">
        <%= f.label :body %><br>
        <%= f.text_area :body %>
      </div>
      <div class="field">
        <%= f.label :name %><br>
        <%= f.text_field :name %>
      </div>
      <div class="actions">
        <%= f.submit %>
      </div>
    <% end %>
<% end %>

Solution

It's a strong params thing. Permit :comments, then the attributes

params.require(:comments).permit(:rating, :body, :name, :game_id)

and, use form_for @comment, not comment_path