Can’t update ACFs using JSON

Resolved

(@fudgeboy)

I’ve got a custom post type called “artist”, with a text ACF called “artist_first_name”.

When I update it by sending form data, it works fine:

    [james@marlon ~] $ curl -i -k --user <redacted> "https://dev.<redacted>.com/wp-json/acf/v2/artist/39608" --data "fields[artist_first_name]=bob"
    HTTP/1.1 200 OK
    Date: Thu, 22 Dec 2016 21:18:56 GMT
    Server: Apache/2.4.18 (Unix) OpenSSL/1.0.1e-fips mod_bwlimited/1.4
    X-Powered-By: PHP/5.4.45
    X-Robots-Tag: noindex
    Access-Control-Expose-Headers: X-WP-Total, X-WP-TotalPages
    Access-Control-Allow-Headers: Authorization, Content-Type
    Transfer-Encoding: chunked
    Content-Type: application/json; charset=UTF-8
    
    {"acf":{"artist_first_name":"bob"}}

but if I try sending JSON, I get a 500 back:

    [james@marlon ~] $ curl -i -k -H "Content-Type: application/json" --user <redacted> "https://dev.<redacted>.com/wp-json/acf/v2/artist/39608" --data-binary '{"fields[artist_first_name]":"bob"}'
    HTTP/1.1 500 Internal Server Error
    Date: Thu, 22 Dec 2016 21:21:49 GMT
    Server: Apache/2.4.18 (Unix) OpenSSL/1.0.1e-fips mod_bwlimited/1.4
    X-Powered-By: PHP/5.4.45
    X-Robots-Tag: noindex
    Access-Control-Expose-Headers: X-WP-Total, X-WP-TotalPages
    Access-Control-Allow-Headers: Authorization, Content-Type
    Transfer-Encoding: chunked
    Content-Type: application/json; charset=UTF-8
    
    {"code":"cant_update_item","message":"Cannot update item","data":{"status":500}}

What am I doing wrong? How can I send a JSON body?

This topic was modified 8 years, 11 months ago by fudgeboy. Reason: formatting

Viewing 4 replies - 1 through 4 (of 4 total)

Plugin Author airesvsg
(@airesvsg)

8 years, 11 months ago
Hi @fudgeboy,
Your JSON structure is not right.

Try it:
```
{
  "fields": {
    "artist_first_name": "Bob"  
  }
}
```
Thanks
- This reply was modified 8 years, 11 months ago by airesvsg.
Thread Starter fudgeboy
(@fudgeboy)

8 years, 11 months ago

That’s great. Thank you.

Is there a reason for the asymmetry between the body sent for a POST and the returned body? I have to send the ACFs in a field called fields, but in the returned JSON, they’re in a field called acf.

This is a shame because it means extra logic in the client to do the (un)marshalling.

robleu
(@robleu)

8 years, 11 months ago

This is brilliant! thanks

How would I update a relationship type field, or post_object type field? I’ve tried passing in json that represents the object – but it doesn’t work…

robleu
(@robleu)

8 years, 11 months ago

Figured it out – simply post the ID’s of the posts in an array

`fields : {
“artists”: [11,22,34,56]
}

each id represents an artist.