Multi-select for Product edit not saving values other than first selection on Save

[synzhu]

I am experiencing an issue similar to issue #4346. If I try to select multiple items for a multi select attribute from the product edit view (in this case, the attribute is Bolt Pattern), only the first one is actually saved to database when I press Save.

However, if I go to the database and manually add the value for the attribute in the catalog_product_entity_varchar table, it shows up correctly when I reload the page in admin panel

but if I press Save, again it only selects the first one and all the others are removed from database as well.

[sunilit42]

have you created attribute using script or backed?

[synzhu]

It was migrated from Magento 1. I have not checked if this problem exists with new attributes created in Magento 2.

[sunilit42]

may be it problem with migration Plase check source model and backend model for same.

[salelsol]

Fixed, go to eav_attribute table, search you multiselect attribute and change in "backend_model" column NULL value with this value: Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend, clear cache and reindex and ty.

[mitcht]

I'm seeing this problem too, albeit with Customer.. Created using a script properly. Can include source if requested. I'm using the Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend method. No values are persisting for me, but the attribute is saving the option_id to the database in the customer_entity_ table. I've tried text and varchar. Both save but will not populate the dropdown.

[palamar]

@simon-zhu
Please, provide the used version. If the problem is actual for a specific tag, please, specify it and be sure that the latest update was used.

[salelsol]

Hi Simon, used version is: Magento 2.0.7, PHP 5.6 and now multiselect works fine. This issue is coming afther migrate customers, order, etc from Magento 1.9 to Magento 2.