ActionController::ParameterMissing (param is missing or the value is empty: name): - ruby-on-rails

Question

While implementing what I thought was a simple signup/login system for a Ruby on Rails app, results haven't matched what tutorials have shown.
I'm trying to use bcrypt for authentication and PostgreSQL for the database.
I continually get 'ActionController::ParameterMissing (param is missing or the value is empty: name): ', even though it will show name as being input. '"users"=>{"name"=>"asdf", "password"=>"Qq!1asdfasdf", "password_confirmation"=>"Qq!1asdfasdf"}, "commit"=>"Submit"} (0.1ms)
output from the console when attempting to sign in
users controller
class UsersController < ApplicationController
def new
end
def create
user = User.new(
name: params[:name],
password: params[:password],
password_confirmation: params[:password_confirmation])
if user.save
session[:user_id] = user.id
redirect_to '/'
else
redirect_to '/signup'
end
end
private
end
The table
class UsersController < ApplicationController
def new
end
def create
user = User.new(
name: params[:name],
password: params[:password],
password_confirmation: params[:password_confirmation])
if user.save
session[:user_id] = user.id
redirect_to '/'
else
redirect_to '/signup'
end
end
private
end
and the signup form
class UsersController < ApplicationController
def new
end
def create
user = User.new(
name: params[:name],
password: params[:password],
password_confirmation: params[:password_confirmation])
if user.save
session[:user_id] = user.id
redirect_to '/'
else
redirect_to '/signup'
end
end
private
end
the user model
class User < ActiveRecord::Base
PASSWORD_FORMAT = /\A
(?=.{10,}) # Must contain 10 or more characters
(?=.*\d) # Must contain a digit
(?=.*[a-z]) # Must contain a lower case character
(?=.*[A-Z]) # Must contain an upper case character
(?=.*[[:^alnum:]]) # Must contain a symbol
/x
#formatting for password
USERNAME_FORMAT = /\A[a-z0-9A-Z\-_]{2,15}\z/ #Can contain lowercase and upercase letters, numbers, - and _, must be between 2 and 15 length
#username formatting
validates :name,
:presence => true,
:uniqueness => true,
:format => USERNAME_FORMAT
validates :password,
:presence => true,
:format => PASSWORD_FORMAT,
:confirmation => true,
:on => create
has_secure_password
end
I've tried troubleshooting, all similar questions haven't yielded an answer or fix.
EDIT: More clarity on issue

Answer 1

You need to use rails Strong Parameter like the following
class UsersController < ApplicationController
def new
end
def create
user = User.new(user_params)
if user.save
session[:user_id] = user.id
redirect_to root_path
else
redirect_to new_user_path
end
end
private
def user_params
params.require(:user).permit(:name, :password, :password_confirmation)
end
end

Answer 2

I think it's a problem of passing data between your form and your controller.
In your logs your parameters for user looks like: "users"=>{"name"=> ...} but it should be "user"
To pass data between your controller and your view, you need to use instance variable such as #user to make the new instance of User available in the view. (source)
In that way your controller should be:
def new
#user = User.new
end
def create
#user = User.new(user_params)
if #user.save
session[:user_id] = #user.id
redirect_to '/'
else
redirect_to '/signup'
end
end
private
def user_params
params.require(:user).permit(:name, :password, :password_confirmation)
end
(with strong parameters like #fool-dev explained)
Then in your view, use this #user to pass the parameters to the controller:
<%= form_for #user do |f| %>
//...the form
<% end %>