AD0-E716: Adobe Commerce Developer with Cloud Add-on Expert

By Adobe · Question Mode

QuestionQ30

APIs and Services

An Adobe Commerce developer adds a new extension attribute to include an array of values on invoices retrieved through the APIs. After some time, their technical manager reviews the work and finds an issue with the extension_attributes.xml file created in the developer’s module:

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What is wrong with this XML snippet?

Explanation

Extension attributes must be declared for the extensible API data interface of the entity being extended. For invoices, that interface is Magento\Sales\Api\Data\InvoiceInterface; a repository model is not the invoice data interface. The string[] notation is valid for an array extension attribute.

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