Compose action skipped due to Condition, but gives a null value that I do not want

[cah2035]

Hello, 
I have a flow that is checking in a source if a Sample ID exists. For all that do not exist, I am composing a list. However, for the ones that do exist, the compose action gives them a null value. 

First up is the "Apply to All" action which goes through each Sample ID to check if it exists, when it does not, a compose is created to hold the Sample ID. Once it goes through all items, I have another Compose action that takes the Outputs from all the Compose actions within the Apply to All. 

However, for items where the Sample ID does not exist, I get the "ActionBranchingConditionNotSatisfied" message, which is expected since the condition is not running that Compose action. But it ends up giving me the "Null" value in the final compose action. How can I stop this from happening?

[Jronash · Accepted solution]

If you want to construct your array using this method, you're not going to be able to avoid those null values.  Fortunately, it's easy to remove them with the Filter array action.  Just do something like this:

[cah2035]

@Jronash  That was perfect, thank you!