Received "An illegal choice has been detected. Please contact the site administrator" while creating node with taxonomy field via service3 drupal7

Question

I am having an error:

{"form_errors":{"field_category][und":"An illegal choice has been detected. Please contact the site administrator."}}

Field category is a taxonomy field attached to a node. I'm trying to create a node via web services and unable to create taxonomy field. I have also match post array by doing print_r($obj) on node form validate:

PHP Array:

[field_category] => Array(
  [und] => Array(
    [0] => Array(
      [tid] => 6246
    )
  )
)

JSON conversion:

"field_category": {
  "und": [
    {
      "tid":6246
    }
  ]
}

However, in response having an error, the same problem with the other taxonomy field. What I am doing wrong with it.

Answer 1

I was having the same issue. After reading this I was able to figure out the problem by doing a dsm($_POST) on hook_node_update() and inspecting the array and figuring out what it expects.

In my case my array looked like this:

'field_term_subtype[und]' => '166',

In your case it would be:

{
    "title": "your title",
    "type": "page",
    "field_category": {
        "und": 6246
    }
}

Answer 2

You should be able to create a node using a POST request.

For the node fields, you can use something like:

$node_data = http_build_query(
  array(    
    'type' => 'page',
    'title' => 'This node was created via the API.',
    'field_category[und][0][tid]' => 6246,
  )
);

[...]

curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $node_data);

[...]

See also: https://drupal.stackexchange.com/a/72758/7153

Answer 3

Try the following Json format to create node having taxonomy filed

{
    "title": "your title",
    "type": "page",
    "field_category": {
        "und": "termname"
    }
}