Fix for Product Attribute's Conditions

Fix for Product Attribute's Conditions if attribute option is deleted.

Description bug:
1. Create new cart rule or edit existing.
2. Add condition with multiselect product attribute (ex. attr activity in magento2+sample data)
3. Choose one option of attribute in condition and save rule
4. Delete this option in Stores->Product attributes
5. Reload Cart Rule Page in admin

1 exception(s):
Exception #0 (Exception): Warning: iconv_strlen() expects parameter 1 to be string, array given in /var/www/sources/sumrak/dev21/vendor/magento/framework/Stdlib/StringUtils.php on line 151

Exception #0 (Exception): Warning: iconv_strlen() expects parameter 1 to be string, array given in /var/www/sources/sumrak/dev21/vendor/magento/framework/Stdlib/StringUtils.php on line 151
#0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'iconv_strlen() ...', '/var/www/source...', 151, Array)
#1 /var/www/sources/sumrak/dev21/vendor/magento/framework/Stdlib/StringUtils.php(151): iconv_strlen(Array, 'UTF-8')
#2 /var/www/sources/sumrak/dev21/vendor/magento/framework/Filter/Truncate.php(76): Magento\Framework\Stdlib\StringUtils->strlen(Array)
#3 /var/www/sources/sumrak/dev21/vendor/magento/framework/Filter/FilterManager.php(133): Magento\Framework\Filter\Truncate->filter(Array)
#4 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Block/Editable.php(74): Magento\Framework\Filter\FilterManager->__call('truncate', Array)
#5 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Block/Editable.php(74): Magento\Framework\Filter\FilterManager->truncate(Array, Array)
#6 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/AbstractElement.php(453): Magento\Rule\Block\Editable->render(Object(Magento\Framework\Data\Form\Element\Multiselect))
#7 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Model/Condition/AbstractCondition.php(649): Magento\Framework\Data\Form\Element\AbstractElement->getHtml()
#8 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Model/Condition/AbstractCondition.php(477): Magento\Rule\Model\Condition\AbstractCondition->getValueElementHtml()
#9 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Model/Condition/AbstractCondition.php(488): Magento\Rule\Model\Condition\AbstractCondition->asHtml()
#10 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Model/Condition/Combine.php(292): Magento\Rule\Model\Condition\AbstractCondition->asHtmlRecursive()
#11 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Model/Condition/Combine.php(292): Magento\Rule\Model\Condition\Combine->asHtmlRecursive()
#12 /var/www/sources/sumrak/dev21/vendor/magento/module-rule/Block/Conditions.php(19): Magento\Rule\Model\Condition\Combine->asHtmlRecursive()
#13 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/AbstractElement.php(453): Magento\Rule\Block\Conditions->render(Object(Magento\Framework\Data\Form\Element\Text))
#14 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/Text.php(43): Magento\Framework\Data\Form\Element\AbstractElement->getHtml()
#15 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/AbstractElement.php(467): Magento\Framework\Data\Form\Element\Text->getHtml()
#16 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/Fieldset.php(229): Magento\Framework\Data\Form\Element\AbstractElement->toHtml()
#17 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/Fieldset.php(80): Magento\Framework\Data\Form\Element\Fieldset->_elementsToHtml(Array)
#18 /var/www/sources/sumrak/dev21/vendor/magento/module-catalog-rule/view/adminhtml/templates/promo/fieldset.phtml(23): Magento\Framework\Data\Form\Element\Fieldset->getChildrenHtml()
#19 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/TemplateEngine/Php.php(59): include('/var/www/source...')
#20 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/Template.php(255): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\Backend\Block\Widget\Form\Renderer\Fieldset), '/var/www/source...', Array)
#21 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/Template.php(279): Magento\Framework\View\Element\Template->fetchView('/var/www/source...')
#22 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/Block/Template.php(104): Magento\Framework\View\Element\Template->_toHtml()
#23 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/AbstractBlock.php(659): Magento\Backend\Block\Template->_toHtml()
#24 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/Block/Widget/Form/Renderer/Fieldset.php(45): Magento\Framework\View\Element\AbstractBlock->toHtml()
#25 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/AbstractElement.php(453): Magento\Backend\Block\Widget\Form\Renderer\Fieldset->render(Object(Magento\Framework\Data\Form\Element\Fieldset))
#26 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form/Element/AbstractElement.php(467): Magento\Framework\Data\Form\Element\AbstractElement->getHtml()
#27 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form.php(322): Magento\Framework\Data\Form\Element\AbstractElement->toHtml()
#28 /var/www/sources/sumrak/dev21/vendor/magento/framework/Data/Form.php(337): Magento\Framework\Data\Form->toHtml()
#29 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/Block/Widget/Form.php(98): Magento\Framework\Data\Form->getHtml()
#30 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/view/adminhtml/templates/widget/form.phtml(15): Magento\Backend\Block\Widget\Form->getFormHtml()
#31 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/TemplateEngine/Php.php(59): include('/var/www/source...')
#32 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/Template.php(255): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\SalesRule\Block\Adminhtml\Promo\Quote\Edit\Tab\Conditions), '/var/www/source...', Array)
#33 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/Template.php(279): Magento\Framework\View\Element\Template->fetchView('/var/www/source...')
#34 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/Block/Template.php(104): Magento\Framework\View\Element\Template->_toHtml()
#35 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Element/AbstractBlock.php(659): Magento\Backend\Block\Template->_toHtml()
#36 /var/www/sources/sumrak/dev21/vendor/magento/module-ui/Component/HtmlContent.php(50): Magento\Framework\View\Element\AbstractBlock->toHtml()
#37 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(148): Magento\Ui\Component\HtmlContent->prepare()
#38 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(145): Magento\Framework\View\Layout\Generator\UiComponent->prepareComponent(Object(Magento\Ui\Component\HtmlContent))
#39 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(145): Magento\Framework\View\Layout\Generator\UiComponent->prepareComponent(Object(Magento\Ui\Component\Container))
#40 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(145): Magento\Framework\View\Layout\Generator\UiComponent->prepareComponent(Object(Magento\Ui\Component\Form\Fieldset))
#41 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(126): Magento\Framework\View\Layout\Generator\UiComponent->prepareComponent(Object(Magento\Ui\Component\Form))
#42 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Generator/UiComponent.php(93): Magento\Framework\View\Layout\Generator\UiComponent->generateComponent(Object(Magento\Framework\View\Layout\Data\Structure), 'sales_rule_form', Array, Object(Magento\Framework\View\Layout\Interceptor))
#43 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/GeneratorPool.php(86): Magento\Framework\View\Layout\Generator\UiComponent->process(Object(Magento\Framework\View\Layout\Reader\Context), Object(Magento\Framework\View\Layout\Generator\Context))
#44 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout.php(327): Magento\Framework\View\Layout\GeneratorPool->process(Object(Magento\Framework\View\Layout\Reader\Context), Object(Magento\Framework\View\Layout\Generator\Context))
#45 /var/www/sources/sumrak/dev21/var/generation/Magento/Framework/View/Layout/Interceptor.php(89): Magento\Framework\View\Layout->generateElements()
#46 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Builder.php(129): Magento\Framework\View\Layout\Interceptor->generateElements()
#47 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Page/Builder.php(55): Magento\Framework\View\Layout\Builder->generateLayoutBlocks()
#48 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout/Builder.php(65): Magento\Framework\View\Page\Builder->generateLayoutBlocks()
#49 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout.php(244): Magento\Framework\View\Layout\Builder->build()
#50 /var/www/sources/sumrak/dev21/vendor/magento/framework/View/Layout.php(859): Magento\Framework\View\Layout->build()
#51 /var/www/sources/sumrak/dev21/var/generation/Magento/Framework/View/Layout/Interceptor.php(414): Magento\Framework\View\Layout->getBlock('promo_sales_rul...')
#52 /var/www/sources/sumrak/dev21/vendor/magento/module-sales-rule/Controller/Adminhtml/Promo/Quote/Edit.php(59): Magento\Framework\View\Layout\Interceptor->getBlock('promo_sales_rul...')
#53 /var/www/sources/sumrak/dev21/var/generation/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Edit/Interceptor.php(24): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit->execute()
#54 /var/www/sources/sumrak/dev21/vendor/magento/framework/App/Action/Action.php(102): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor->execute()
#55 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/App/AbstractAction.php(226): Magento\Framework\App\Action\Action->dispatch(Object(Magento\Framework\App\Request\Http))
#56 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(74): Magento\Backend\App\AbstractAction->dispatch(Object(Magento\Framework\App\Request\Http))
#57 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Chain/Chain.php(70): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor->___callParent('dispatch', Array)
#58 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Chain/Chain.php(63): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\SalesRu...', 'dispatch', Object(Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor), Array, 'adminAuthentica...')
#59 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/App/Action/Plugin/Authentication.php(143): Magento\Framework\Interception\Chain\Chain->Magento\Framework\Interception\Chain\{closure}(Object(Magento\Framework\App\Request\Http))
#60 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Chain/Chain.php(67): Magento\Backend\App\Action\Plugin\Authentication->aroundDispatch(Object(Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http))
#61 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\SalesRu...', 'dispatch', Object(Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor), Array, 'adminMassaction...')
#62 /var/www/sources/sumrak/dev21/vendor/magento/module-backend/App/Action/Plugin/MassactionKey.php(33): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http))
#63 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(142): Magento\Backend\App\Action\Plugin\MassactionKey->aroundDispatch(Object(Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http))
#64 /var/www/sources/sumrak/dev21/var/generation/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Edit/Interceptor.php(39): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor->___callPlugins('dispatch', Array, Array)
#65 /var/www/sources/sumrak/dev21/vendor/magento/framework/App/FrontController.php(55): Magento\SalesRule\Controller\Adminhtml\Promo\Quote\Edit\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http))
#66 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(74): Magento\Framework\App\FrontController->dispatch(Object(Magento\Framework\App\Request\Http))
#67 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Chain/Chain.php(70): Magento\Framework\App\FrontController\Interceptor->___callParent('dispatch', Array)
#68 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\Interception\Chain\Chain->invokeNext('Magento\\Framewo...', 'dispatch', Object(Magento\Framework\App\FrontController\Interceptor), Array, 'install')
#69 /var/www/sources/sumrak/dev21/vendor/magento/framework/Module/Plugin/DbStatusValidator.php(69): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http))
#70 /var/www/sources/sumrak/dev21/vendor/magento/framework/Interception/Interceptor.php(142): Magento\Framework\Module\Plugin\DbStatusValidator->aroundDispatch(Object(Magento\Framework\App\FrontController\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http))
#71 /var/www/sources/sumrak/dev21/var/generation/Magento/Framework/App/FrontController/Interceptor.php(26): Magento\Framework\App\FrontController\Interceptor->___callPlugins('dispatch', Array, Array)
#72 /var/www/sources/sumrak/dev21/vendor/magento/framework/App/Http.php(135): Magento\Framework\App\FrontController\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http))
#73 /var/www/sources/sumrak/dev21/vendor/magento/framework/App/Bootstrap.php(258): Magento\Framework\App\Http->launch()
#74 /var/www/sources/sumrak/dev21/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))

app/code/Magento/Rule/Model/Condition/AbstractCondition.php

@@ -441,6 +441,8 @@ public function getValueName()
  }
  if (!empty($valueArr)) {
  $value = implode(', ', $valueArr);
+ } elseif(is_array($value)) {
+ $value = implode(', ', $value);
  }
  return $value;
  }