I need to bind depends_on with multiple resource base on the condition.

I am using for_each as creating multiple resource for same type at resource level.

Now, I want to reference other resources using depends_on property based on on the other property value like below e.g.

depends_on = each.value.backend_address_pool? [azurerm_lb.load_balancer, azurerm_lb_backend_address_pool.pool_address] :[ azurerm_lb.load_balancer ]

but Terraform won’t allow that, as it requires a static list. I’ve tried:

1. Checking dependent property null or not.
2. Using concat function to generate list.

How can I express this dependency?