Password can't be blank, Bcrypt

Question

After installing Bcrypt on my Rails app, there is a validation problem :password=>"Can't be blank", even though form is filled out:

This is my User model

class User < ActiveRecord::Base   
  before_save { self.email = email.downcase }   
  validates :username, presence: true, length: { maximum: 50 }

  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i

  validates :email, presence:   true,
            format:     { with: VALID_EMAIL_REGEX },
            uniqueness: { case_sensitive: false }   
  has_secure_password   
  validates :password, length: { minimum: 6 } 
end

I've tried in the rails c and now the digest appears:

User.create:

User.create(username: "Riprova", email:"[email protected]", password: "nonfunzia", password_confirmation:"nonfunzia")

<User id: 15, username: "Riprova", name: nil, surname: nil, email: "[email protected]", gender: nil, birth: nil, created_at: "2013-08-11 15:35:03", updated_at: "2013-08-11 15:35:03", password_digest: "$2a$10$Q/5qtZYDXRcFsUWgve3JL.wui4hSHLhGgsuO0C6TTkBY...">

User controller:

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  # GET /users
  # GET /users.json
  def index
    @users = User.all
  end

  # GET /users/1
  # GET /users/1.json
  def show
  end

  # GET /users/new
  def new
    @user = User.new
  end

  # GET /users/1/edit
  def edit
  end

  # POST /users
  # POST /users.json
  def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: 'User was successfully created.' }
        format.json { render action: 'show', status: :created, location: @user }
      else
        format.html { render action: 'new' }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /users/1
  # PATCH/PUT /users/1.json
  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to @user, notice: 'User was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.json
  def destroy
    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_user
      @user = User.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def user_params
      params.require(:user).permit(:username, :name, :surname, :email, :bids_left, :bids_left_free, :gender, :birth)
    end
end

Answer 1

If you're using Rails 3.x you need to add attr_accessible :password or that parameter will be disallowed. On Rails 4, see strong parameters. The password param is probably being filtered out. Others (like username) probably as well.