Change e-mail whitelist/blacklist to not be checked when invited (#10683)

* Change e-mail whitelist/blacklist to not be checked when invited

And only when creating an account, not when updating it later

Fix #10648

* Fix test

app/models/user.rb

@@ -78,7 +78,7 @@ class User < ApplicationRecord
   accepts_nested_attributes_for :invite_request, reject_if: ->(attributes) { attributes['text'].blank? }
 
   validates :locale, inclusion: I18n.available_locales.map(&:to_s), if: :locale?
-  validates_with BlacklistedEmailValidator, if: :email_changed?
+  validates_with BlacklistedEmailValidator, on: :create
   validates_with EmailMxValidator, if: :validate_email_dns?
   validates :agreement, acceptance: { allow_nil: false, accept: [true, 'true', '1'] }, on: :create
 

app/validators/blacklisted_email_validator.rb

@@ -2,7 +2,10 @@
 
 class BlacklistedEmailValidator < ActiveModel::Validator
   def validate(user)
+    return if user.invited?
+
     @email = user.email
+
     user.errors.add(:email, I18n.t('users.invalid_email')) if blocked_email?
   end
 

spec/validators/blacklisted_email_validator_spec.rb

@@ -8,6 +8,7 @@ RSpec.describe BlacklistedEmailValidator, type: :validator do
     let(:errors) { double(add: nil) }
 
     before do
+      allow(user).to receive(:invited?) { false }
       allow_any_instance_of(described_class).to receive(:blocked_email?) { blocked_email }
       described_class.new.validate(user)
     end