I have a JSON that can hold single or multi values arrays and I can’t make subprocess + migration_lookup behave consistently. It correctly imports the nodes in all cases, but it adds the reference to the imported nodes (entity reference field) only when I have more than 1 item in my array.
my JSON can looks like this:
"behaviour": [ { "name": "behaviour name", "description": "behaviour description" } ] or like this:
"behaviour": [ { "name": "behaviour name", "description": "behaviour description" }, { "name": "another behaviour name", "description": "another behaviour description" } ] the process part of my migration config:
field_behaviour: plugin: sub_process source: behaviour_array process: target_id: plugin: migration_lookup migration: import_behaviours_json source: name 
