Conditional expression in SnapLogic - json

Question

I need to check whether or not an entry is present in the data output from a REST call. The JSON output looks something like this:
{
"entity": {
"entries":[
{
"ID": "1",
"Pipeline": "Pipeline_1",
"State":"Completed"
}
],
"duration":1074,
"create_time":"2010-10-10"
}
}
I want to check if for example, Pipeline_1 is missing, then I want the pipeline to print out that 'Pipeline_1 is missing', if not - null. I have tried using the ternary (?) expression:
!$Pipeline.contains ("Pipeline_1") ? "Pipeline_1 is missing" : null && !$Pipeline.contains ("Pipeline_2") ? "Pipeline_2 is missing" : null
I'm having problems with the syntax and I just can't get it right using this method, because it only processes the first query.
I have also tried using the match method, but haven't had success with it either:
match $Pipeline {
$Pipeline!=("Pipeline_1") => 'Pipeline_1 is missing',
$Pipeline!=("Pipeline_2") => 'Pipeline_2 is missing',
_ => 'All of the pipelines have been executed successfully'
}
I have to check for multiple conditions. Any suggestions on how I should nest the conditional expressions? Thank you in advance.

Answer 1

Assuming that you are not splitting the array $entity.entries[*] and processing the incoming document as is, following is a possible solution.
Test Pipeline:
Input:
{
"entity": {
"entries": [
{
"ID": "1",
"Pipeline": "Pipeline_1",
"State": "Completed"
}
],
"duration": 1074,
"create_time": "2010-10-10"
}
}
Expression:
{
"Pipeline_1": $entity.entries.reduce((a, c) => c.Pipeline == "Pipeline_1" || a, false),
"Pipeline_2": $entity.entries.reduce((a, c) => c.Pipeline == "Pipeline_2" || a, false)
}.values().reduce((a, c) => c && a, true) ? "All pipelines executed successfully" : "Pipeline(s) missing"
Output:
If you don't want to do it in a single expression, then you can use a Conditional snap like as follows.
Following is the output of the Conditional snap.
Then you can process it as you please.