POSTS

Getting ManageIQ instance attributes without executing methods/states

May 26, 2015

I want to use the values from the ProvisionRequestQuotaVerification instance. The problem is that using $evm.instantiate will cause the code to run. This results in an exception or error.

Digging around I found

1

$evm.instance_get(path)

Which works as long as you know the full path including the domain, but then you can not rely on domain inheritance.

1

my_instance = $evm.instance_get("/ManageIQ/Infrastructure/VM/Provisioning/StateMachines/ProvisionRequestQuotaVerification/default")

Here is my current workaround:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10


# Sending a fake message does not invoke the state because it is
# tied to the create message.
fake_message = "doesnotreallywork"
empty_instance = $evm.instantiate("/Infrastructure/VM/Provisioning/StateMachines/ProvisionRequestQuotaVerification/Default##{fake_message}")

# Unfortunately so are the attributes. However, now we know the real
# name of the resolved instance and can use that to get our attributes.
instance_name = empty_instance.name
my_instance = $evm.instance_get(instance_name)
$evm.log(:info, "The instance contains: #{my_instance.inspect}