better check for when we're falling back on a default BaseRelationField value #1436
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Description
It’s already possible to import multiple values into fields that extend
BaseRelationField
.In a case where in the feed you have a key with an empty array value, you map that empty array value to a
BaseRelationField
, and you select a “Default ” too (on the mapping screen), the current check assumes you’ve set the feed value tonull
, and fails when you’ve set it to an empty array. This PR improves this behaviour.Related issues
#1432