Update only specified fields of PrestaShop product via API

[m4rlb0r0]

Is it really necessary to download the entire product from api to update the price?

I can send back such xml:

<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
   <product>
       <id><![CDATA[]]></id>
       <price><![CDATA[]]></price>
       <wholesale_price><![CDATA[]]></wholesale_price>
    </product>
</prestashop>

Unfortunately, not completed fields clear entries in the database.
Is it possible to add a flag to the xml parsing function so that it does not update the absent fields?

Thanks in advance for your help

[m4rlb0r0]

Any ideas ?

[vad1]

As it says in devdocs class validation for fields is the same for POST (create) and PUT (update) but it will be fixed in future introducing PATCH method.

https://devdocs.prestashop.com/1.7/webservice/getting-started/#control-returned-fields-with-display

As bypass you can develop your own module using addWebserviceResources hook to handle request with custom XML (like you mentioned before).