Post mileage - get error "category can't be blank"

1

In my post request I am defining category as either “Mileage” or “https://api.freeagent.com/v2/categories/249”, just as the documentation requires. I’m also posting all he other mandatory fields and some optional ones too.

Nevertheless I cannot shake this error. Example array being submitted:

Array
(
[user] => 345673
[category] => https://api.freeagent.com/v2/categories/249
[dated_on] => 2022-11-14
[description] => test trip
[project] => 3399083
[rebill_to_project] => 3399083
[mileage] => 30
[vehicle_type] => Car
[engine_type] => Electric
[engine_size] => All
[reclaim_mileage] => 1
[reclaim_mileage_rate] => 0.5
[rebill_mileage_rate] => 0.5
)

Is there something broken at FA or something missing in the documentation that’s causing this to fail? I’m out of ideas. Anyone seen this before?

2

I’ve solved it. When posting only one mileage claim the single expense must be nested inside the expenses endpoint.