Multiselect attribute not saving in Magento 2.3.0

Question

I have created the multi-select attribute for customer address using below code.

Setup/UpgradeData.php

        $customerEntity = $customerSetup->getEavConfig()->getEntityType('customer_address');
        $attributeSetId = $customerEntity->getDefaultAttributeSetId();

        $customerSetup->addAttribute('customer_address', 'address_purpose', [
            'type' => 'text',
            'label' => 'Address Purpose',
            'input' => 'multiselect',
            'required' => false,
            'visible' => false,
            'user_defined' => true,
            'sort_order' => 1000,
            'position' => 1000,
            'system' => 0,
            'backend' => 'Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend',
            'source' => 'Vendor\Module\Model\Entity\Attribute\Source\AddressPurpose'
        ]);

        $attribute = $customerSetup->getEavConfig()->getAttribute('customer_address', 'address_purpose')
            ->setData([
                'used_in_forms' =>  ['adminhtml_customer_address', 'customer_address_edit', 'customer_register_address','customer_address']
            ]);
        $attribute->save();

Here is my AddressPurpose.php

  use Magento\Eav\Model\Entity\Attribute\Source\AbstractSource;

 class AddressPurpose extends AbstractSource
  {
   public function getAllOptions()
    {
        return [
           'option1' => [
            'label' => 'Delivery',
            'value' => 'delivery'
        ],
        'option2' => [
            'label' => 'General',
            'value' => 'general'
           ]
        ];
     }
   }

Using above code customer address attribute created successfully.

When I open any customer in admin and selected the option and click Save, The customer getting saved but the selected options are not getting saved.

Again I edit the same customer, Address purpose attribute values empty with none selected.

Have anyone face this issue? Please help me on this. Thanks

Answer 1

When creating the customer attribute, please take care about following things:

Attribute is added to the attribute set, group

customer_eav_attribute
eav_entity_attribute

Attribute is assigned to customer forms

customer_form_attribute

And the last one the most important as somehow, people just skip over it and wondering why the customer attribute does not want to save from the backend: Please make sure to set "is_system" flag in "customer_eav_attribute" table to 0, otherwise the attribute will not be saved.

It can be done by setting the attribute option to "system" => 0 in attribute parameters inside the install/upgrade script.

Don't forget to flush your cache after all!

direct link to solution

Edit You can create modules from here or here