Hello is it kosher to instantiate resource classes inside `

Question

Hello is it kosher to instantiate resource classes inside ` apply` callbacks

little-whale-73288 · Answer

Answering myself nope <https www pulumi com docs intro concepts inputs outputs apply> you should not allocate new resources inside of your callbacks either as it could lead to `pulumi preview` being wrong

little-whale-73288 · Answer

In this case what is the proper way of instantiating a resource per each of zones returned by <https www pulumi com docs reference pkg aws getavailabilityzones >

little-whale-73288 · Answer

perhaps it s OK to do it inside ` then` on a promise but not inside ` apply` on an output

billowy-army-68599 · Answer

while we try and recommend not doing this it s sometimes unavoidable this seems like one of those cases

billowy-army-68599 · Answer

if you re okay with the preview being wrong you can go with this

little-whale-73288 · Answer

thanks It s an option but OTOH we consider reliable previews necessary