Unit 6

Chapter 3: Model Parameters

In this chapter, you will add parameters to the admin and user models.

New Branch

Enter the command "git checkout -b 06-03-model_params".

Adding User Parameters

Create user model tests. Replace the contents of test/models/user_test.rb with the following:

require 'test_helper'

class UserTest < ActiveSupport::TestCase
  def setup
    @user = User.new(last_name: 'Bond', first_name: 'James',
                     username: 'jbond007', email: '007@example.com',
                     password: 'bond_james_bond',
                     password_confirmation: 'bond_james_bond',
                     confirmed_at: Time.now)
  end

  test 'should be valid' do
    assert @user.valid?
  end

  test 'email should be present' do
    @user.email = '     '
    assert_not @user.valid?
  end

  test 'email should not be too long' do
    @user.email = 'a' * 244 + '@example.com'
    assert_not @user.valid?
    @user.email = 'a' * 243 + '@example.com'
    assert @user.valid?
  end

  test 'email validation should accept valid addresses' do
    valid_addresses = %w(user@example.com USER@foo.COM A_US-ER@foo.bar.org
                         first.last@foo.jp alice+bob@baz.cn)
    valid_addresses.each do |valid_address|
      @user.email = valid_address
      assert @user.valid?, "#{valid_address.inspect} should be valid"
    end
  end

  test 'email validation should reject invalid addresses' do
    invalid_addresses = %w(user@example,com user_at_foo.org user.name@example.
                           foo@bar_baz.com foo@bar+baz.com)
    invalid_addresses.each do |invalid_address|
      @user.email = invalid_address
      assert_not @user.valid?, "#{invalid_address.inspect} should be invalid"
    end
  end

  test 'email address should be unique' do
    # duplicate_user: same email but uppercase; different username
    duplicate_user = @user.dup
    duplicate_user.email = @user.email.upcase
    duplicate_user.username = 'jbond008'
    @user.save
    assert_not duplicate_user.valid?
    # duplicate_user: different email; different username
    duplicate_user = @user.dup
    duplicate_user.email = '008@example.com'
    duplicate_user.username = 'jbond008'
    @user.save
    assert duplicate_user.valid?
  end

  test 'username should be unique' do
    # duplicate_user: different email; same username but uppercase
    duplicate_user = @user.dup
    duplicate_user.email = '008@example.com'
    duplicate_user.username = @user.username.upcase
    @user.save
    assert_not duplicate_user.valid?
    # duplicate_user: different email; different username
    duplicate_user = @user.dup
    duplicate_user.email = '008@example.com'
    duplicate_user.username = 'jbond008'
    @user.save
    assert duplicate_user.valid?
  end

  test 'username should be present' do
    @user.username = 'jbond_007'
    assert @user.valid?
    @user.username = 'j'
    assert @user.valid?
    @user.username = '     '
    assert_not @user.valid?
  end

  test 'username should not have @ symbol in it' do
    @user.username = 'jbond007@'
    assert_not @user.valid?
    @user.username = '@jbond007'
    assert_not @user.valid?
    @user.username = 'jbond007@example.com'
    assert_not @user.valid?
  end

  test 'username should be no longer than 255 characters' do
    @user.username = 'a' * 256
    assert_not @user.valid?
    @user.username = 'a' * 255
    assert @user.valid?
  end

  test 'first name should be present and no longer than 50 characters' do
    @user.first_name = '     '
    assert_not @user.valid?
    @user.first_name = 'A' + 'a' * 50
    assert_not @user.valid?
  end

  test 'last name should be present and no longer than 50 characters' do
    @user.last_name = '     '
    assert_not @user.valid?
    @user.last_name = 'A' + 'a' * 50
    assert_not @user.valid?
  end

  test 'password should have a minimum length of 10 characters' do
    @user.password = @user.password_confirmation = 'a' * 9
    assert_not @user.valid?
    @user.password = @user.password_confirmation = 'a' * 10
    assert @user.valid?
  end
end

Enter the command "sh testm.sh". You'll see that all 13 user model tests fail.
Update the user model. Enter the following commands to add parameters:

rails generate migration add_params_to_users last_name:string first_name:string username:string
rails db:migrate:reset

Make the users confirmable and lockable. In the db/migrate/(date)_devise_create_users.rb file, uncomment the lines under "## Confirmable" and "## Lockable" and the lines beginning with "add_index".
Enter the command "rails db:migrate:reset".
Replace the contents of app/models/user.rb with the following:

#
class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :confirmable, :lockable, authentication_keys: [:username]

  before_save :downcase_email, :downcase_username

  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\-.]+\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 },
                    format: { with: VALID_EMAIL_REGEX },
                    uniqueness: { case_sensitive: false }

  validates :last_name, presence: true, length: { maximum: 50 }
  validates :first_name, presence: true, length: { maximum: 50 }

  VALID_USERNAME_REGEX = /\A[\w+\-.]+\z/i
  validates :username, presence: true, length: { maximum: 255 },
                       format: { with: VALID_USERNAME_REGEX },
                       uniqueness: { case_sensitive: false }

  private

  # Converts email to all lower-case.
  def downcase_email
    self.email = email.downcase
  end

  # Converts username to all lower-case.
  def downcase_username
    self.username = username.downcase
  end
end

Enter the command "sh testm.sh". You'll see that one test fails, the test for minimum password length.
Edit the config/initializers/devise.rb file. Change the value of the config.password_length parameter from "6..128" to "10..128".
Enter the command "sh testml.sh". All tests should pass, and there should be no offenses cited by Brakeman, RuboCop, or Rails Best Practices.
Update the user test fixtures by replacing the contents of test/fixtures/users.yml with the following:

# Read about fixtures at
# http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html

connery:
  last_name: 'Connery'
  first_name: 'Sean'
  username: 'sconnery'
  email: 'sean_connery@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'Goldfinger') %>
  confirmed_at: <%= Time.zone.now %>

lazenby:
  last_name: 'Lazenby'
  first_name: 'George'
  username: 'glazenby'
  email: 'george_lazenby@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'ohmss1969') %>
  confirmed_at: <%= Time.zone.now %>

moore:
  last_name: 'Moore'
  first_name: 'Roger'
  username: 'rmoore'
  email: 'roger_moore@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'moonraker') %>
  confirmed_at: <%= Time.zone.now %>

dalton:
  last_name: 'Dalton'
  first_name: 'Timothy'
  username: 'tdalton'
  email: 'timothy_dalton@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'daylights') %>
  confirmed_at: <%= Time.zone.now %>

brosnan:
  last_name: 'Brosnan'
  first_name: 'Pierce'
  username: 'pbrosnan'
  email: 'pierce_brosnan@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'goldeneye') %>
  confirmed_at: <%= Time.zone.now %>

craig:
  last_name: 'Craig'
  first_name: 'Daniel'
  username: 'dcraig'
  email: 'daniel_craig@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'reboot007') %>
  confirmed_at: <%= Time.zone.now %>

blofeld:
  last_name: 'Blofeld'
  first_name: 'Ernst'
  username: 'eblofeld'
  email: 'ernst_blofeld@example.com'
  encrypted_password: <%= User.new.send(:password_digest, 'stainless steel') %>
  confirmed_at: <%= Time.zone.now %>

Enter the command "sh git_check.sh".
Enter the following commands:

git add .
git commit -m "Passes user model tests"

Adding Admin Parameters

Create admin model tests. Replace the contents of test/models/admin_test.rb with the following:

require 'test_helper'

class AdminTest < ActiveSupport::TestCase
  def setup
    @admin = Admin.new(last_name: 'Bond', first_name: 'James',
                       username: 'jbond007', email: '007@example.com',
                       password: 'bond_james_bond',
                       password_confirmation: 'bond_james_bond',
                       confirmed_at: Time.now)
  end

  test 'should be valid' do
    assert @admin.valid?
  end

  test 'email should be present' do
    @admin.email = '     '
    assert_not @admin.valid?
  end

  test 'email should not be too long' do
    @admin.email = 'a' * 244 + '@example.com'
    assert_not @admin.valid?
    @admin.email = 'a' * 243 + '@example.com'
    assert @admin.valid?
  end

  test 'email validation should accept valid addresses' do
    valid_addresses = %w(admin@example.com ADMIN@foo.COM A_US-ER@foo.bar.org
                         first.last@foo.jp alice+bob@baz.cn)
    valid_addresses.each do |valid_address|
      @admin.email = valid_address
      assert @admin.valid?, "#{valid_address.inspect} should be valid"
    end
  end

  test 'email validation should reject invalid addresses' do
    invalid_addresses = %w(admin@example,com admin_at_foo.org
                           admin.name@example. foo@bar_baz.com
                           foo@bar+baz.com)
    invalid_addresses.each do |invalid_address|
      @admin.email = invalid_address
      assert_not @admin.valid?, "#{invalid_address.inspect} should be invalid"
    end
  end

  test 'email address should be unique' do
    duplicate_admin = @admin.dup
    duplicate_admin.email = @admin.email.upcase
    @admin.save
    assert_not duplicate_admin.valid?
  end

  test 'username should be unique' do
    # duplicate_admin: different email; same username but uppercase
    duplicate_admin = @admin.dup
    duplicate_admin.email = '008@example.com'
    duplicate_admin.username = @admin.username.upcase
    @admin.save
    assert_not duplicate_admin.valid?
    # duplicate_admin: different email; different username
    duplicate_admin = @admin.dup
    duplicate_admin.email = '008@example.com'
    duplicate_admin.username = 'jbond008'
    @admin.save
    assert duplicate_admin.valid?
  end

  test 'username should be present' do
    @admin.username = 'jbond_007'
    assert @admin.valid?
    @admin.username = 'j'
    assert @admin.valid?
    @admin.username = '     '
    assert_not @admin.valid?
  end

  test 'username should not have @ symbol in it' do
    @admin.username = 'jbond007@'
    assert_not @admin.valid?
    @admin.username = '@jbond007'
    assert_not @admin.valid?
    @admin.username = 'jbond007@example.com'
    assert_not @admin.valid?
  end

  test 'username should be no longer than 255 characters' do
    @admin.username = 'a' * 256
    assert_not @admin.valid?
    @admin.username = 'a' * 255
    assert @admin.valid?
  end

  test 'first name should be present and no longer than 50 characters' do
    @admin.first_name = '     '
    assert_not @admin.valid?
    @admin.first_name = 'A' + 'a' * 50
    assert_not @admin.valid?
  end

  test 'last name should be present and no longer than 50 characters' do
    @admin.last_name = '     '
    assert_not @admin.valid?
    @admin.last_name = 'A' + 'a' * 50
    assert_not @admin.valid?
  end

  test 'password should have a minimum length of 10 characters' do
    @admin.password = @admin.password_confirmation = 'a' * 9
    assert_not @admin.valid?
    @admin.password = @admin.password_confirmation = 'a' * 10
    assert @admin.valid?
  end
end

Enter the command "sh testm.sh". You'll see that all 13 admin model tests fail.
Update the admin model. Enter the following commands to add parameters:

rails generate migration add_params_to_admins last_name:string first_name:string username:string super:boolean
rails db:migrate:reset

In the db/migrate/(time)_devise_create_admins.rb file, uncomment the lines under "## Confirmable" and "## Lockable" and the lines beginning with "add_index".
Enter the command "rails db:migrate:reset".
Enter the command "sh testm.sh". 8 of the tests should fail.
Replace the contents of the app/models/admin.rb file with the following:

#
class Admin < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :confirmable, :lockable, authentication_keys: [:username]

  before_save :downcase_email, :downcase_username

  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\-.]+\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 },
                    format: { with: VALID_EMAIL_REGEX },
                    uniqueness: { case_sensitive: false }

  validates :last_name, presence: true, length: { maximum: 50 }
  validates :first_name, presence: true, length: { maximum: 50 }

  VALID_USERNAME_REGEX = /\A[\w+\-.]+\z/i
  validates :username, presence: true, length: { maximum: 255 },
                       format: { with: VALID_USERNAME_REGEX },
                       uniqueness: { case_sensitive: false }

  private

  # Converts email to all lower-case.
  def downcase_email
    self.email = email.downcase
  end

  # Converts username to all lower-case.
  def downcase_username
    self.username = username.downcase
  end
end

Enter the command "sh testm.sh". You'll see that all model tests pass.
Enter the command "sh testml.sh". You'll see that there are no Brakeman, RuboCop, or Rails Best Practices offenses.
Update the admin test fixtures by replacing the contents of test/fixtures/admins.yml with the following:

# Read about fixtures at
# http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html

elle_woods: 
  username: 'ewoods'
  last_name: 'Woods'
  first_name: 'Elle'
  email: 'elle_woods@example.com'
  super: true
  encrypted_password: <%= Admin.new.send(:password_digest, 'endorphins') %>
  confirmed_at: <%= Time.zone.now %>

vivian_kensington:
  username: 'vkensington'
  last_name: 'Kensington'
  first_name: 'Vivian'
  email: 'vivian_kensingston@example.com'
  super: true
  encrypted_password: <%= Admin.new.send(:password_digest, 'nice outfit') %>
  confirmed_at: <%= Time.zone.now %>

emmett_richmond:
  username: 'erichmond'
  last_name: 'Richmond'
  first_name: 'Emmett'
  email: 'emmett_richmond@example.com'
  super: false
  encrypted_password: <%= Admin.new.send(:password_digest, "new representation") %>
  confirmed_at: <%= Time.zone.now %>
  
paulette_bonafonte:
  username: 'pbonafonte'
  last_name: 'Bonafonte'
  first_name: 'Paulette'
  email: 'paulette_bonafonte@example.com'
  super: false
  encrypted_password: <%= Admin.new.send(:password_digest, "Neptune's Beauty Nook") %>
  confirmed_at: <%= Time.zone.now %>
  
professor_callahan:
  username: 'pcallahan'
  last_name: 'Callahan'
  first_name: 'Professor'
  email: 'professor_callahan@example.com'
  super: true
  encrypted_password: <%= Admin.new.send(:password_digest, 'Titanic guy') %>
  confirmed_at: <%= Time.zone.now %>

warner_huntington:
  username: 'whuntington'
  last_name: 'Huntington'
  first_name: 'Warner'
  email: 'warner_huntington@example.com'
  super: false
  encrypted_password: <%= Admin.new.send(:password_digest, 'need someone serious') %>
  confirmed_at: <%= Time.zone.now %>

Enter the command "sh git_check.sh".
Enter the following commands:

git add .
git commit -m "Passes admin model tests"

Wrapping Up

Enter the command "git push origin 06-03-model_params".
Go to the GitHub repository and click on the "Compare and pull request" button for this branch.
Accept this pull request to merge it with the master branch, but do NOT delete this branch.
Enter the following commands:

git checkout master
git pull
sh heroku.sh

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06-03-model_params.md

06-03-model_params.md

Unit 6

Chapter 3: Model Parameters

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Adding User Parameters

Adding Admin Parameters

Wrapping Up

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06-03-model_params.md

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Unit 6

Chapter 3: Model Parameters

New Branch

Adding User Parameters

Adding Admin Parameters

Wrapping Up