Skip object property assignment

[Gordonby]

Setting some object properties to null or empty causes deployments to fail.

Scenario, and my workaround are written up here;
https://github.com/Gordonby/BicepLessons/blob/main/EmptyObjectProperties.md

Relates to issue on the Bicep project : Azure/bicep#387

[arnaudhelin]

Hi,

Yes but i found a "workaround" for this for the moment. The keypoint for my code si to test if my object contains a Key, and apply a default value if it doesn't.

1. For the moment:
   (i.e. to link nsg to subnet, where "subnet" is an object from my json):

id: contains(subnet, 'networkSecurityGroup') ? resourceId(subnet.networkSecurityGroup.resourceGroup, 'Microsoft.Network/networkSecurityGroups', subnet.networkSecurityGroup.name) : resourceId('RG-WORKAROUND', 'Microsoft.Network/networkSecurityGroups', 'NSG-WORKAROUND')

2. When Bicep will accept null value, I won't use the mock object anymore and write :
   (i.e. to link nsg to subnet, where "subnet" is an object from my json):
   ...
   id: contains(subnet, 'networkSecurityGroup') ? resourceId(subnet.networkSecurityGroup.resourceGroup, 'Microsoft.Network/networkSecurityGroups', subnet.networkSecurityGroup.name) : null
   ...

At the and of the deployment, I remove the fake object.