Magento – Magento 2: Set product dropdown attribute

magento2product

I want to set a value to a dropdown attribute.

I try to use $product->setSize("M") but it is set to null.

Do I need to create the option of dropdown attribute ?

Best Answer

I am amused , you want dynamic drop-down for Product attribute then you should create custom attribute with dynamic Source: from Setup/UpgradeData.php script:

if (version_compare($context->getVersion(), '1.0.3') < 0) {
        //code to upgrade to 1.0.3
        $eavSetup->addAttribute(\Magento\Catalog\Model\Product::ENTITY, 'product_channel', [
            'type' => 'varchar',
            'label' => 'Size',
            'input' => 'select',
            'source' => 'Custom\Product\Model\Products\Attribute\Source\sizeattribute',
            'backend' => 'Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend',
            'required' => false,
            'sort_order' => 20,
            'global' => \Magento\Catalog\Model\ResourceModel\Eav\Attribute::SCOPE_GLOBAL,
            'group' => 'General',
            'visible' => true,
            'is_used_in_grid' => true,
            'is_visible_in_grid' => true,
            'is_filterable_in_grid' => true,
        ]);
    }

I hope it will help you.

Related Solutions

Magento – Create attribute option if not exists

You would need to check the attribute for the option you are adding, and if it doesn't exist, add it using Mage_Eav_Model_Entity_Setup.

<?php

foreach($productColors as $sku => $color) {

    addAttributeValue('color', $color);

}

function addAttributeValue($attributeCode, $attValue) {

    if (!attributeValueExists($attributeCode, $attValue)) {
        $attr_model = Mage::getModel('catalog/resource_eav_attribute');
        $attr = $attr_model->loadByCode('catalog_product', $attributeCode);
        $attr_id = $attr->getAttributeId();
        $option['attribute_id'] = $attr_id;
        $option['value']['option_name'][0] = $attValue;
        $setup = new Mage_Eav_Model_Entity_Setup('core_setup');
        $setup->addAttributeOption($option);
    }
}

function attributeValueExists($attribute, $value) {
    $attribute_model = Mage::getModel('eav/entity_attribute');
    $attribute_options_model = Mage::getModel('eav/entity_attribute_source_table');
    $attribute_code = $attribute_model->getIdByCode('catalog_product', $attribute);
    $attribute = $attribute_model->load($attribute_code);
    $attribute_options_model->setAttribute($attribute);
    $options = $attribute_options_model->getAllOptions(false);

    foreach ($options as $option) {
        if ($option['label'] == $value) {
            return $option['value'];
        }
    }
    return false;
}

This may need some tweaking for your particular situation, but the general idea works.

Magento – Set dropdown value using text value

This is untested but should work:

$colourId = $product->getResource()->getAttribute("colour")->getSource()->getOptionId("red");
$product->setColour($colourId)->save();

Best Answer

Related Solutions

Magento – Create attribute option if not exists

Magento – Set dropdown value using text value

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