Unable to log food - keep getting "Date is required"

[gypsy_ranger]

I've authenticated fine, retrieved my token and am able to query data without problem.  However, when attempting to POST data, I keep getting the error message:

{"errors":[{"errorType":"validation","fieldName":"date","message":"Date is required"}]}

The POST payload is as per the documentation for logging by foodId:

{"foodId": 81911,

 "date": "2019-10-13",

 "amount": 2,

 "unitId": 226,

 "mealTypeId": 7,

 "favorite": false}

As you can see, there's definitely a date there!  So why the error message?

I'm trying to POST to https://api.fitbit.com/1/user/-/foods/log.json as per the docs, with the token in the headers. (Repeat: I can retrieve data fine so the headers/token is correct).

Is everybody else able to log foods via the Web API ? What am I missing here please?

Thank you,

C.

[gypsy_ranger · Accepted solution]

OK, have solved this.  Really simple error.  Turns out that the Fitbit Web API POST method does not support a JSON payload but rather expects to receive form data.

So instead of this:

curl -X POST \
-H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9xxxxxx" " \
--data '{"foodId": 81911, "date": 2019-10-13, "amount": 2, "unitId": 226, "mealTypeId": 7, "favorite": false}' \
https://api.fitbit.com/1/user/-/foods/log.json

We have to use this:

curl -X POST \
-H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9xxxxxx" \
--data "foodId=81911&date=2019-10-13&amount=2&unitId=226&mealTypeId=7&favorite=false" \
https://api.fitbit.com/1/user/-/foods/log.json

Given that the URLs of the Fitbit API endpoints end in ".json", this seems incredibly non-intuitive. 

Also, the error messages were misleading. They should have mentioned that the format of data was incorrect, that they did not receive form data.

C.