How to add custom select options in a custom admin form

Question

I am creating a custom fom in admin and want to load the custom select option in the form as a select field options.

Below is my code :

app/code/Vendor/Module/Block/Adminhtml/Grid/Edit/Form.php

<?php
namespace Vendor\Module\Block\Adminhtml\Grid\Edit;
 
 
/**
 * Adminhtml Add New Row Form.
 */
class Form extends \Magento\Backend\Block\Widget\Form\Generic
{
 /**
 * @var \Magento\Store\Model\System\Store
 */
 protected $_systemStore;
 
 /**
 * @param \Magento\Backend\Block\Template\Context $context
 * @param \Magento\Framework\Registry $registry
 * @param \Magento\Framework\Data\FormFactory $formFactory
 * @param array $data
 */
 public function __construct(
 \Magento\Backend\Block\Template\Context $context,
 \Magento\Framework\Registry $registry,
 \Magento\Framework\Data\FormFactory $formFactory,
 \Magento\Cms\Model\Wysiwyg\Config $wysiwygConfig,
 \Vendor\Module\Model\Status $options,
 array $data = []
 ) 
 {
 $this->_options = $options;
 $this->_wysiwygConfig = $wysiwygConfig;
 parent::__construct($context, $registry, $formFactory, $data);
 }
 
 /**
 * Prepare form.
 *
 * @return $this
 */
 protected function _prepareForm()
 {
 
 $dateFormat = $this->_localeDate->getDateFormat(\IntlDateFormatter::SHORT);
 $model = $this->_coreRegistry->registry('row_data');
 $form = $this->_formFactory->create(
 ['data' => [
 'id' => 'edit_form', 
 'enctype' => 'multipart/form-data', 
 'action' => $this->getData('action'), 
 'method' => 'post'
 ]
 ]
 );
 
 $form->setHtmlIdPrefix('question_');
 
 $fieldset->addField(
 'name',
 'text',
 [
 'name' => 'name',
 'label' => __('NAME'),
 'id' => 'name',
 'title' => __('NAME'),
 'class' => 'required-entry',
 'required' => true,
 ]
 );
 $fieldset->addField(
 'email',
 'text',
 [
 'name' => 'email',
 'label' => __('Email'),
 'id' => 'email',
 'title' => __('Email'),
 'class' => 'required-entry',
 'required' => true,
 ]
 );
 
 $fieldset->addField('is_answered', 'select', 
 [
 'name' => 'is_answered',
 'label' => __('Status'),
 'options' => ['1' => __('Pending By Seller'), '0' => __('Pending By Admin')],
 'required' => true,
 ]);
 $form->setValues($model->getData());
 $form->setUseContainer(true);
 $this->setForm($form);
 
 return parent::_prepareForm();
 }
}

I want to load custom data(email) entries from custom table in the email field as a drop-down in the form.

Answer 1

Try with below code

Create source provider for email values

Vendor\Module\Model\Email\Options.php

<?php
namespace Vendor\Module\Model\Email;
class Options implements \Magento\Framework\Option\ArrayInterface
{ 
 /**
 * Return array of options as value-label pairs, eg. value => label
 *
 * @return array
 */
 public function toOptionArray()
 {
 // You can write your code to fetch email values from custom table and convert it to as value => label pair
 return [
 'value' => 'Label',
 '[email protected]' => '[email protected]',
 '[email protected]' => '[email protected]',
 ];
 }
}

Vendor\Module\Block\Adminhtml\Grid\Edit\Form.php

<?php
namespace Vendor\Module\Block\Adminhtml\Grid\Edit;
/**
 * Adminhtml Add New Row Form.
 */
class Form extends \Magento\Backend\Block\Widget\Form\Generic
{
 /**
 * @var \Magento\Store\Model\System\Store
 */
 protected $_systemStore;
 /**
 * @var \Vendor\Module\Model\Email\Options
 */
 protected $_emailOptions;
 /**
 * @param \Magento\Backend\Block\Template\Context $context
 * @param \Magento\Framework\Registry $registry
 * @param \Magento\Framework\Data\FormFactory $formFactory
 * @param array $data
 */
 public function __construct(\Magento\Backend\Block\Template\Context $context, \Magento\Framework\Registry $registry, \Magento\Framework\Data\FormFactory $formFactory, \Magento\Cms\Model\Wysiwyg\Config $wysiwygConfig, \Vendor\Module\Model\Status $options, \Vendor\Module\Model\Email\Options $emailOptions, array $data = [])
 {
 $this->_options = $options;
 $this->_wysiwygConfig = $wysiwygConfig;
 $this->_emailOptions = $emailOptions;
 parent::__construct($context, $registry, $formFactory, $data);
 }
 /**
 * Prepare form.
 *
 * @return $this
 */
 protected function _prepareForm()
 {
 $dateFormat = $this
 ->_localeDate
 ->getDateFormat(\IntlDateFormatter::SHORT);
 $model = $this
 ->_coreRegistry
 ->registry('row_data');
 $form = $this
 ->_formFactory
 ->create(['data' => ['id' => 'edit_form', 'enctype' => 'multipart/form-data', 'action' => $this->getData('action') , 'method' => 'post']]);
 $form->setHtmlIdPrefix('question_');
 $fieldset->addField(
 'name',
 'text',
 [
 'name' => 'name',
 'label' => __('NAME'),
 'id' => 'name',
 'title' => __('NAME'),
 'class' => 'required-entry',
 'required' => true,
 ]
 );
 $fieldset->addField(
 'email',
 'select',
 [
 'name' => 'email',
 'label' => __('Email'),
 'id' => 'email',
 'title' => __('Email'),
 'values' => $this->_emailOptions->toOptionArray() 'class' => 'select', 'required' => true, ]);
 $fieldset->addField('is_answered', 'select', 
 [
 'name' => 'is_answered',
 'label' => __('Status'),
 'options' => ['1' => __('Pending By Seller'), '0' => __('Pending By Admin')],
 'required' => true,
 ]);
 $form->setValues($model->getData());
 $form->setUseContainer(true);
 $this->setForm($form);
 return parent::_prepareForm();
 }
}

Thanks!

Answer 2

You can add select field like this :

$fieldset->addField(
 'custom_dropdown',
 'select',
 [
 'name' => 'custom_dropdown',
 'label' => __('Custom Dropdown'),
 'title' => __('Custom Dropdown'),
 'values' => [0 => __('No'), 1 => __('Yes')],
 'class' => 'select'
 ]
);

Replace custom_dropdown value by your field name & add your custom data array in values field.

• PRABHAT MISHRA: This will work if we have only a few options but in my case there are number entries in that custom table. it won't be possible to write them all here in this file. I have tried this but by doing this the values of these option comes as 1,2,3,4... etc. and i want them to be same as select options.
• Rohan Hapani: You can add like this : $this->attributeSetOptions->toOptionArray(); Here toOptionArray() with return custom data.
• PRABHAT MISHRA: I am a bit confused can you explain it. how actually i can do this.
• Rohan Hapani: vendor/magento/module-configurable-product/Block/Adminhtml/Product/Edit/AttributeSet/Form.php here you can see that how dynamic value set as I told you. Let me know still if you have confusion.