Nil in Database for Ruby on Rails -

i'm extremely new, , going through basic ruby rails tutorial except tweaking add fields , renaming calls articles @ contacts.

problem is, fine, except data being added in nil. here controller:

class contactscontroller < applicationcontroller    def index @contacts = contact.all    end def show   @contacts = contact.find(params[:id]) end  def new  end  def create @contacts = contact.new(contact_params)  @contacts.save redirect_to @contacts  end end  private    def contact_params      params.require(:contacts).permit(:first_name, :last_name, :phone_number,     :notes)     end 

my migrate file:

 class createcontacts < activerecord::migration  def change    create_table :contacts |t|      t.string :first_name      t.text :last_name      t.text :phone_number      t.text :notes        t.timestamps null: false     end   end  end 

and i'm looking in terminal , see this:

 started post "/contacts" 127.0.0.1 @ 2015-07-16 14:38:54 -0700 processing contactscontroller#create html   parameters: {"utf8"=>"✓",     "authenticity_token"=>"5l/werimovbipaq4rgb6oj8tilhkvvy96gggrntzp2uwzxj6csmidshzs     rqzxbqhjatp60qmurg7hwlly5hf/w==", "contacts"=>{"first_name"=>"hello",      "last_name"=>"aagin", "phone_number"=>"1231313", "notes"=>"smsda"},     "commit"=>"save contacts"}  unpermitted parameters: first_name, last_name, phone_number, notes 

i think they're might 'unpermitted parameters' part, because there seems difference in caps there.

if see wrong, please let me know! thank you. edit = here's view:

<h1>new contact</h1>  <%= form_for :contacts, url: contacts_path |f| %>   <p>     <%= f.label :first_name %><br>     <%= f.text_field :first_name %>   </p>   <p>     <%= f.label :last_name  %><br>     <%= f.text_field :last_name %>   </p>   <p>      <%= f.label :phone_number %><br>     <%= f.text_field :phone_number %>   </p>   <p>     <%= f.label :notes %><br>     <%= f.text_area :notes %>   </p>    <p>   <%= f.submit %>   </p> <% end %>  <%= link_to 'back', contacts_path %> 

you not consistent contacts , contact. change line to.

 params.require(:contact).permit(:first_name, :last_name, :phone_number,     :notes) 

name variables according rails conventions co @contacts should changed @contact.