Railsのlog/development.logの見方を教えてください。

Question

Rails5.1.3でWebアプリケーション制作の勉強をしています。
createアクションで新規フォームから受け取ったデータを保存できなくて原因がわからず質問したところlogを
見てみましょう。とアドバイスを受けました。
コントローラのcreateアクションで@customer_form.saveが失敗しているようなのです。
そこでlog/development.logを表示しましたが記述されている内容がわからずどこが悪いのかもわからずに困っております。

log/development.log  (出力されたログ）

app/controllers/visitor/customers_controller.rb:9:in `create'
Started POST "/visitor/customer" for 10.0.2.2 at 2018-09-21 13:46:16 +0900
Processing by Visitor::CustomersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"3vPpGkNSLgir5/FOG+gv7CrWEePyDNSeUkJ7YANnVlR4n0QMH/gXI+TC/qIE/w8o0FpSkJun2YPXpXwn2cMigg==", "form"=>{"customer"=>{"email"=>"[e-mail]", "password"=>"[FILTERED]", "family_name"=>"佐藤", "given_name"=>"一郎", "family_name_kana"=>"サトウ", "given_name_kana"=>"イチロウ", "phones"=>{"0"=>{"number"=>"0184362632", "primary"=>"0"}, "1"=>{"number"=>"07011456699", "primary"=>"0"}}}, "inputs_home_address"=>"1", "home_address"=>{"postal_code"=>"9204278", "prefecture"=>"佐賀県", "city"=>"にかほ市", "address1"=>"開発1-2-4", "address2"=>"レイルズハイツ302号室"}}, "commit"=>"登録", "host"=>"fujiyoshi.nouen.com"}
Unpermitted parameter: :phones
Unpermitted parameters: :email, :password, :family_name, :given_name, :family_name_kana, :given_name_kana
#<Visitor::CustomerForm:0x007f168d4a9a48 @customer=#<Customer id: nil, email: "[e-mail]", email_for_index: nil, family_name: "佐藤", given_name: "一郎", family_name_kana: "サトウ", given_name_kana: "イチロウ", hashed_password: "$2a$10$Sh7h65EAWu1Z/hyZ5P825u41lMzNzoSA8DvXGy278Rb...", created_at: nil, updated_at: nil>, @inputs_home_address=true, @params=<ActionController::Parameters {"customer"=><ActionController::Parameters {"email"=>"[e-mail]", "password"=>"password", "family_name"=>"佐藤", "given_name"=>"一郎", "family_name_kana"=>"サトウ", "given_name_kana"=>"イチロウ", "phones"=>{"0"=>{"number"=>"0184362632", "primary"=>"0"}, "1"=>{"number"=>"07011456699", "primary"=>"0"}}} permitted: false>, "inputs_home_address"=>"1", "home_address"=><ActionController::Parameters {"postal_code"=>"9204278", "prefecture"=>"佐賀県", "city"=>"にかほ市", "address1"=>"開発1-2-4", "address2"=>"レイルズハイツ302号室"} permitted: false>} permitted: false>>
   (0.5ms)  BEGIN
  Customer Exists (0.5ms)  SELECT  1 AS one FROM `customers` WHERE `customers`.`email_for_index` = BINARY '[e-mail]' LIMIT 1
   (0.3ms)  ROLLBACK
  Rendering visitor/customers/new.html.erb within layouts/customer
  Rendered visitor/customers/_phone_fields.html.erb (4.6ms)
  Rendered visitor/customers/_phone_fields.html.erb (1.9ms)
  Rendered visitor/customers/_customer_fields.html.erb (40.4ms)
  Rendered visitor/customers/_home_address_fields.html.erb (16.2ms)
  Rendered visitor/customers/_form.html.erb (66.0ms)
  Rendered visitor/customers/new.html.erb within layouts/customer (72.3ms)
  Rendered customer/shared/_header.html.erb (1.4ms)
  Rendered shared/_footer.html.erb (1.1ms)
Completed 200 OK in 1549ms (Views: 813.7ms | ActiveRecord: 1.2ms)

コンソールに表示された内容

app/controllers/visitor/customers_controller.rb:9:in `create'
Started POST "/visitor/customer" for 10.0.2.2 at 2018-09-21 13:46:16 +0900
Processing by Visitor::CustomersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"3vPpGkNSLgir5/FOG+gv7CrWEePyDNSeUkJ7YANnVlR4n0QMH/gXI+TC/qIE/w8o0FpSkJun2YPXpXwn2cMigg==", "form"=>{"customer"=>{"email"=>"[e-mail]", "password"=>"[FILTERED]", "family_name"=>"佐藤", "given_name"=>"一郎", "family_name_kana"=>"サトウ", "given_name_kana"=>"イチロウ", "phones"=>{"0"=>{"number"=>"0184362632", "primary"=>"0"}, "1"=>{"number"=>"07011456699", "primary"=>"0"}}}, "inputs_home_address"=>"1", "home_address"=>{"postal_code"=>"9204278", "prefecture"=>"佐賀県", "city"=>"にかほ市", "address1"=>"開発1-2-4", "address2"=>"レイルズハイツ302号室"}}, "commit"=>"登録", "host"=>"fujiyoshi.nouen.com"}
Unpermitted parameter: :phones
Unpermitted parameters: :email, :password, :family_name, :given_name, :family_name_kana, :given_name_kana
#<Visitor::CustomerForm:0x007f168d4a9a48 @customer=#<Customer id: nil, email: "[e-mail]", email_for_index: nil, family_name: "佐藤", given_name: "一郎", family_name_kana: "サトウ", given_name_kana: "イチロウ", hashed_password: "$2a$10$Sh7h65EAWu1Z/hyZ5P825u41lMzNzoSA8DvXGy278Rb...", created_at: nil, updated_at: nil>, @inputs_home_address=true, @params=<ActionController::Parameters {"customer"=><ActionController::Parameters {"email"=>"[e-mail]", "password"=>"password", "family_name"=>"佐藤", "given_name"=>"一郎", "family_name_kana"=>"サトウ", "given_name_kana"=>"イチロウ", "phones"=>{"0"=>{"number"=>"0184362632", "primary"=>"0"}, "1"=>{"number"=>"07011456699", "primary"=>"0"}}} permitted: false>, "inputs_home_address"=>"1", "home_address"=><ActionController::Parameters {"postal_code"=>"9204278", "prefecture"=>"佐賀県", "city"=>"にかほ市", "address1"=>"開発1-2-4", "address2"=>"レイルズハイツ302号室"} permitted: false>} permitted: false>>
   (0.5ms)  BEGIN
  Customer Exists (0.5ms)  SELECT  1 AS one FROM `customers` WHERE `customers`.`email_for_index` = BINARY '[e-mail]' LIMIT 1
   (0.3ms)  ROLLBACK
  Rendering visitor/customers/new.html.erb within layouts/customer
  Rendered visitor/customers/_phone_fields.html.erb (4.6ms)
  Rendered visitor/customers/_phone_fields.html.erb (1.9ms)
  Rendered visitor/customers/_customer_fields.html.erb (40.4ms)
  Rendered visitor/customers/_home_address_fields.html.erb (16.2ms)
  Rendered visitor/customers/_form.html.erb (66.0ms)
  Rendered visitor/customers/new.html.erb within layouts/customer (72.3ms)
  Rendered customer/shared/_header.html.erb (1.4ms)
  Rendered shared/_footer.html.erb (1.1ms)
Completed 200 OK in 1549ms (Views: 813.7ms | ActiveRecord: 1.2ms)

コードは以下になります。

customers_controller.rb

class Visitor::CustomersController < Visitor::Base
  def new
    @customer_form = Visitor::CustomerForm.new
  end
  
  def create
    @customer_form = Visitor::CustomerForm.new
    @customer_form.assign_attributes(params[:form])
    if @customer_form.save
      flash.notice = '顧客アカウントを新規登録しました。'
      render action: 'new'
    else
      flash.now.alert = '入力に誤りがあります。'
      render action: 'new'
    end
  end
  
  private
  def customer_params
    @params.require(:customer).permit(:email, :password, :family_name, :given_name, :family_name_kana, :given_name_kana)
  end
end

visitor/customer_form.rb

class Visitor::CustomerForm
  include ActiveModel::Model
  
  attr_accessor :customer, :inputs_home_address
  delegate :persisted?, :save, to: :customer
  
  def initialize(customer = nil)
    @customer = customer
    @customer ||= Customer.new(family_name_kana: 'カタカナ', given_name_kana: 'カタカナ')
    (2 - @customer.personal_phones.size).times do
      @customer.personal_phones.build
    end
    self.inputs_home_address = @customer.home_address.blank?
    @customer.build_home_address unless @customer.home_address
    @customer.build_history unless @customer.history_ids
  end
  
  def assign_attributes(params = {})
    @params = params
    self.inputs_home_address = params[:inputs_home_address] == '1'
    
    customer.assign_attributes(customer_params)
    
    phones = phone_params(:customer).fetch(:phones)
    customer.personal_phones.size.times do |index|
      attributes = phones[index.to_s]
      if attributes && attributes[:number].present?
        customer.personal_phones[index].assign_attributes(attributes)
      else
        customer.personal_phones[index].mark_for_destruction
      end
    end
    
    if inputs_home_address
      customer.home_address.assign_attributes(home_address_params)
    else
      customer.home_address.mark_for_destruction
    end
  end
  
  private
  def phone_params(record_name)
    @params.require(record_name).permit(phones: [ :number, :primary ])
  end
  
  def customer_params
    @params.require(:customer).permit(:email, :password, :family_name, :given_name, :family_name_kana, :given_name_kana)
  end
  
  def home_address_params
    @params.require(:home_address).permit(:postal_code, :prefecture, :city, :address1, :address2
    )
  end
end

どなたか教えていただけないでしょうか？宜しくお願いします。

Answer 1

フォームに入力した値が登録されないことから始原因の追跡が始まったのですが
app/controllers/concerns/error_handlers.rbのコード記述ミスが原因のようです。
extend ActiveSupport::Concernをextend ActiveSupport::Concermと入力ミスをしていて
includedメソッドが利用できなくmodels/concernsのフィルのincludedメソッドが使えなかったのが原因のようでした。全く見当違いの所を長々と悩んでいました。