angularjs - Using Angular and Rails: Bcrypt throwing an error when trying to create user -

i working on app use angular , rails. trying create new user, keep getting error:

bcrypt::errors::invalidhash (invalid hash):  app/models/user.rb:14:in `new'  app/models/user.rb:14:in `password'  app/controllers/users_controller.rb:8:in `create' 

it seems angular creating password, not getting passed rails.

parameters: {"first_name"=>"john", "last_name"=>"smith", "email"=>"john.smith@gmail.com", "username"=>"johnsmith", "password"=>"[filtered]", "user"=>{"first_name"=>"john", "last_name"=>"smith", "username"=>"johnsmith", "email"=>"john.smith@gmail.com"}} 

here frontend code looks like:

app.js

$scope.signup = function() {    var newuser = {first_name: $scope.firstname, last_name: $scope.lastname, email: $scope.email, username: $scope.username, password: $scope.password}    $http.post('http://localhost:3000/users', newuser)      .success(function(data) {        console.log(data);        if (data.errors) {          console.log(data.errors);        }        else {          $location.path("/sign_in");        }      })  };

signup.html

<div class="form-group has-success signup-box">    <form name="signupform" novalidate>      <input type="text" ng-required="true" class="form-control" placeholder="first name" ng-model="firstname"/>      <input type="text" ng-required="true" class="form-control" placeholder="last name" ng-model="lastname"/>      <input type="text" ng-required="true" class="form-control" placeholder="email" ng-model="email"/>      <input type="text" ng-required="true" class="form-control" placeholder="username" ng-model="username"/>      <input type="text" ng-required="true" class="form-control" placeholder="password" ng-model="password"/>      <input type="submit" ng-disabled="signupform.$invalid" class="form-control btn btn-success" value="sign up" ng-click="signup()" />    </form>    <a href="/#/sign_in">sign in</a>  </div>

and backend code:

users_controller.rb

class userscontroller < applicationcontroller    def create     user = user.new(user_params)     if user.save       render json: "you create account. please log in information."     else       render json: user     end   end    private    def user_params     params.require(:user).permit(:first_name, :last_name, :username, :email, :password)   end end 

user.rb

require 'bcrypt'  class user < activerecord::base   include bcrypt    ***    validates :first_name, :last_name, :username, :email, :password, presence: true    ***    def password     @password ||= password.new(password_hash)   end    def password=(new_password)     @password = password.create(new_password)     self.password_hash = @password   end end 

any appreciated!

i able rid of error. apparently, rails did not format of data being passed in. in app.js file on line 2 (see question) replaced:

{first_name: $scope.firstname, last_name: $scope.lastname, email: $scope.email, username: $scope.username, password: $scope.password}' 

with

{user: {first_name: $scope.firstname, last_name: $scope.lastname, email: $scope.email, username: $scope.username, password: $scope.password}}