get_body_params() is always empty in POST request

Question

I am registering a custom route like this :

add_action('rest_api_init', function () {
  register_rest_route( 'professeurEQ', 'statistics', array(
          'methods'  => 'POST',
          'callback' => 'test_proeq_post',
      ));
});

The callback is written like this :

function test_proeq_post($request) {
  $jsonParams = $request->get_body_params();
  return var_dump($jsonParams);
}

I am sending the POST request using Postman and the following body :

{
    "userID" = 3
}

Whatever I am doing, the $jsonParams is always empty. The same thing happens with methods like get_json_params or get_params or get_param.

get_body() works, but I would like to receive an array and use the get_body_params() method.

If I do

var_dump($request)

Then I see the full request, and I noticed all the parameters are protected. I think it must be the cause of the problem, but how to solve it ?

Answer 1

The value you're trying to send in the body is not valid JSON:

{
    "userID" = 3
}

JSON looks like this:

{
    "userID": 3
}