magento 2 how to get cms blocks toOptionArray

Question

<?php
 namespace [Vendor\Module]\Model\System\Config;
 use Magento\Cms\Model\ResourceModel\Block\CollectionFactory;
 use Magento\Framework\Data\OptionSourceInterface;
 class CmsBlocks implements OptionSourceInterface
 {
 /**
 * @var array
 */
 private $options;
 /**
 * @var \Magento\Cms\Model\ResourceModel\Block\CollectionFactory
 */
 private $collectionFactory;
 /**
 * @param \Magento\Cms\Model\ResourceModel\Block\CollectionFactory $collectionFactory
 */
 public function __construct(
 CollectionFactory $collectionFactory
 ) {
 $this->collectionFactory = $collectionFactory;
 }
 /**
 * {@inheritdoc}
 */
 public function toOptionArray()
 {
 if (!$this->options) {
 $this->options = $this->collectionFactory->create()->toOptionIdArray();
 }
 return $this->options;
 }
 }

it complains Array to string conversion Can anyone guide why i am getting this

I am trying to call this in admin grid

$fieldset->addField(
 'cms_block',
 'select',
 [
 'name' => 'cms_block',
 'label' => __('CMS Block'),
 'title' => __('CMS Block'),
 'options' => $this->_cmsBlock->toOptionArray(),
 ]
 );

Admin grid

<?php

namespace [Vendor\Module]\Model\Block\Adminhtml\TestModule\Edit\Tab;

use Magento\Backend\Block\Widget\Form\Generic; use Magento\Backend\Block\Widget\Tab\TabInterface; use Magento\Backend\Block\Template\Context; use Magento\Framework\Registry; use Magento\Framework\Data\FormFactory; use [Vendor\Module]\Model\Model\System\Config\CmsBlocks;

class Adverts extends Generic implements TabInterface {

/**
 * @var \[Vendor\Module]\Model\\Model\System\Config\Store
 */
protected $_cmsBlock;
public function __construct(
 Context $context,
 Registry $registry,
 FormFactory $formFactory,
 CmsBlocks $cmsBlock,
 array $data = []
) {
 $this->_cmsBlock = $cmsBlock;
 parent::__construct($context, $registry, $formFactory, $data);
}
/**
 * Prepare form fields
 *
 * @return \Magento\Backend\Block\Widget\Form
 */
protected function _prepareForm()
{
 /** @var $model \Magetop\Helloworld\Model\PostsFactory */
 $model = $this->_coreRegistry->registry('testmodule_testmodule');
 /** @var \Magento\Framework\Data\Form $form */
 $form = $this->_formFactory->create();
 $form->setHtmlIdPrefix('post_');
 $form->setFieldNameSuffix('testmodule');
 // new filed
 $fieldset = $form->addFieldset(
 'base_fieldset',
 ['legend' => __('Adverts')]
 );
 if ($model->getId()) {
 $fieldset->addField(
 'entity_id',
 'hidden',
 ['name' => 'id']
 );
 }
 $fieldset->addField(
 'cms_block',
 'select',
 [
 'name' => 'cms_block',
 'label' => __('CMS Block'),
 'title' => __('CMS Block'),
 'options' => $this->_cmsBlock->toOptionArray(),
 ]
 );
 $data = $model->getData();
 $form->setValues($data);
 $this->setForm($form);
 return parent::_prepareForm();
}
/**
 * Prepare label for tab
 *
 * @return string
 */
public function getTabLabel()
{
 return __('Posts Info');
}
/**
 * Prepare title for tab
 *
 * @return string
 */
public function getTabTitle()
{
 return __('Posts Info');
}
/**
 * {@inheritdoc}
 */
public function canShowTab()
{
 return true;
}
/**
 * {@inheritdoc}
 */
public function isHidden()
{
 return false;
}

}

• Tj1997: I have tried this way but not returning expected values '$data = $this->collectionFactory->create(); // $options = []; $options = $data->toOptionArray(); foreach ($options as $block) { $options = ['label' => $block['label'],'value' => $block['value']]; } return $options;'

Answer 1

Try this:

namespace [Vendor\Module]\Model\System\Config;
use Magento\Cms\Model\ResourceModel\Block\CollectionFactory;
use Magento\Framework\Option\ArrayInterface;
class CmsBlocks implements ArrayInterface {
/**
 * @var array
 */
 private $options;
 /**
 * @var \Magento\Cms\Model\ResourceModel\Block\CollectionFactory
 */
 private $collectionFactory;
 /**
 * @param \Magento\Cms\Model\ResourceModel\Block\CollectionFactory $collectionFactory
 */
 public function __construct(
 CollectionFactory $collectionFactory
 ) {
 $this->collectionFactory = $collectionFactory;
 }
public function toOptionArray(){
 $options = array();
 $collection = $this->collectionFactory->create();
 foreach($collection as $block){
 $options[] = [
 'value' => $block->getData('identifier'),
 'label' => $block->getData('title')
 ];
 } 
 return $options;
}
}

And try change the addField like this:

 $fieldset->addField(
 'cms_block',
 'select',
 [
 'name' => 'cms_block',
 'label' => __('CMS Block'),
 'title' => __('CMS Block'),
 'options' => $this->_cmsBlock->toOptionArray()
 ]
 );

• Tj1997: I did try this but i was getting following error Notice: Array to string conversion in vendor/magento/framework/Data/Form/Element/Select.php on line 114
• Alan Zavagli: i've edited my answer check what implements the class now
• Tj1997: I am still getting the same error Array to string conversion
• Alan Zavagli: Seems like the issue is not here, can you show me the declaration inside the admin grid of the class? (Use, construct...) and try to remove the last comma: $this->_cmsBlock->toOptionArray(),
• Tj1997: added to the question now

Answer 2

I think i have found the answer but not sure why this worked.

public function toOptionArray(){
 $collection = $this->collectionFactory->create();
 $options = array();
 foreach ($collection as $key => $value) {
 $options[$key] = $value['title'];
 }
 return $options;

But now the value I selected won't save

• Alan Zavagli: it wont save because if that's a custom form you'll have to manually set it in the save action controller