"Error parsing JSON field value. Unexpected OBJECT_START at [16], field=add" adding record to Solr via cURL

Question

Based on the example here (and other places), I am attempting to add a record to a simple Solr index (the only fields are src and dest, both single value string fields, and solrconfig is set to auto generate the id value) via PHP and cURL using the following code:

$data = array(
  "add" => array(
    "doc" => array(
      "src" => $src,
      "dest" => $dest
    ),
    "commitWithin" => 1000,
  ),
);

$data_string = json_encode(array($data));
$add_url = 'https://my-solr-url.com/solr/my_index/update?commit=true&wt=json';
$add_ch = curl_init($add_url);
curl_setopt($add_ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($add_ch, CURLOPT_POST, 1);
curl_setopt($add_ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
curl_setopt($add_ch, CURLOPT_POSTFIELDS, $data_string);
$add_response = json_decode(curl_exec($add_ch));
curl_close($add_ch);

However, when I run it, I get the following error:

Error parsing JSON field value. Unexpected OBJECT_START at [16], field=add

Based on the Solr docs, I tried the following variation:

$data = array(
  'src' => $src,
  'dest' => $dest
);

$data_string = json_encode(array($data));
$add_url = 'https://my-solr-url.com/solr/my_index/update/json/docs?commit=true&wt=json';
$add_ch = curl_init($add_url);
curl_setopt($add_ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($add_ch, CURLOPT_POST, 1);
curl_setopt($add_ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
curl_setopt($add_ch, CURLOPT_POSTFIELDS, $data_string);
$add_response = json_decode(curl_exec($add_ch));
curl_close($add_ch);

But now I get an error about Unknown field src. From what I can see, Im following the docs, but nothing works. What do I need to change?

Because it is a PHP array (this is PHP code), and the data needs to be in json format in the URL. — wonder95, Jul 17 '18 at 17:50
But as @YvesLeBorg asked, why `$data_string = json_encode(array($data));` ... ? Just do `$data_string = json_encode($data);` — IncredibleHat, Jul 17 '18 at 17:51
Oh. thanks, @IncredibleHat, I see what you're saying. That did the trick. I'll add an answer. — wonder95, Jul 17 '18 at 17:55

wonder95 · Accepted Answer · 2018-07-17T18:16:19.363

0

So it turns out the issue was that I was creating a double array:

$data = array(
  "add" => array(
    "doc" => array(
      "src" => $src,
      "dest" => $dest
    ),
    "commitWithin" => 1000,
  ),
);

$data_string = json_encode(array($data));

Once I changed the last line to

$data_string = json_encode($data);

it worked fine.

edited Jul 17 '18 at 18:16

answered Jul 17 '18 at 18:01

wonder95

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"Error parsing JSON field value. Unexpected OBJECT_START at [16], field=add" adding record to Solr via cURL

1 Answers1