The following scenario will do the trick for you:​
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The “Set multiple variables” module is there to take the ids from the input, enclose them in separate arrays and compare them.
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The current value array is then split and each value (id) from there is considered only if it is contained inside the “previous value” array.
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The second route of the scenario does the exact opposite, i.e. the id is considered only if it is not inside the previous array.
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When setting up the filter, it’s important to select the “contains” / “does not contain” conditions from the Array operators section.
In case you wanna check out the scenario “from the inside” here’s the blueprint you can import into your editor:
blueprint_comparing_arrays.json (14.2 KB)
