Rails ActiveModel::ForbiddenAttributesError - ruby-on-rails

Question

rarils 4.0.0
I'm trying to post a comments but I have an error:
ActiveModel::ForbiddenAttributesError in CommentsController#create
ActiveModel::ForbiddenAttributesError
def create
#comment = #article.comments.new(params[:comment]) #error point highlight this line
Parameters
{"utf8"=>"✓",
"authenticity_token"=>"zSq3KpEbucFQLa6XStEJ/I0+CpKPLFYcU/WGIdneeMg=",
"comment"=>{"name"=>"g12345",
"email"=>"g12345#12345.com",
"body"=>"hello hello"},
"commit"=>"Add",
"article_id"=>"5"}
my comments/new.html.erb
<%= form_for([#article, #article.comments.new], remote: true) do |f| %>
<%= tag(:input, :type => "hidden", :name => request_forgery_protection_token.to_s, :value => form_authenticity_token) %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :email %><br />
<%= f.text_field :email %>
</div>
<div class="field">
<%= f.label :body %><br />
<%= f.text_area :body %>
</div>
<div class="actions">
<%= f.submit 'Add' %>
</div>
<% end %>

Answer 1

Rails 4 uses strong parameters by default. Do you have something like:
params.require(:some_param).permit(...)
or
params.permit(:list, :of, :allowed, :params)
in your CommentsController?
It would look something like this:
class CommentsController < ApplicationController
def create
#comment = #article.comments.new(comment_params) #error point highlight this line
end
private
def comment_params
params.require(:comment).permit(:name, :email, :body)
end
end