Add a value to Array in document

I have a collection where one of the attributes is an Array.
I want to add a value to this array, and to make it as efficient as possible
The simple way would be :

• To get the Array,
• to add the new value to the Array
• to update the document with the new array

but it requires 2 interactions with the database (and if I dont know the ID of the document, 3)
I am trying to make it all in a single interaction:
Just to add the vew value in the Array with the UpdateDocument function
Is it possible?

Thanks,

Add a value to Array in document

Array operations like this aren't available yet

you can achieve this with the help of cloud function.

Thank you

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