Check for existance of related object in Microflow expression

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In a microflow I want to check if a related object exists or not. So a pizza might or might not have a related image. I tried: if $Pizza/PizzaMarco.Pizza_Image = empty then ... else ... But this check returns true all the time. How can I check if such object exists?
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3 answers
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I accidently fixed my own problem. Because Auto create was enabled in my form, an empty image was created if I didn't provide one. Code above works like a charm.

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The expression that you specified should work the way you describe. Could you explain the structure of your metamodel, and show the complete expression that you use?

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2

Ok, the more complete version this time.

In my Metamodel I have two objects: Pizza( String:PizzaName, Currency:PizzaPrice, Boolean:HasImage, System.Image:&Pizza_Image )

HasBoolean is a virtual atrribute, with a microflow 'PizzaHasImage'. I want to show this attribute in a datagrid column.

The Microflow is as follows: Inputs: Pizza:InputPizzaObject 1 Activity: Een Variable.Create action, Datatype=Boolean, Name=HasImage, Code:

$InputPizzaObject/PizzaMario_1.Pizza_Image != empty

Thw microflow returntype is a Boolean, returning $HasImage.

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