CURLOPT_POST

[dietcheese]

Was getting 400 errors when creating relationships, i.e.

$SugarAPI->linkRecords($module,$id,$relationship_link,$related_id);

Found that the configureType() method in /src/Request/Abstracts/AbstractRequest.php (line 240) was setting this option:

$this->setOption(CURLOPT_POST, true);

I believe this option was overriding the application/json content type headers on the request, which was causing the issue.

I resolved this by commenting out the following:

/src/Request/Abstracts/AbstractRequest.php (line 240)

$this->setOption(CURLOPT_POST, true);
break;

Hope that helps someone.