Empty Placeholder Extraction

Problem/Motivation

When a file does not exist, we still add the empty string as a value for the field. Solr then adds the placeholder text which results in "aöbäcüdöeäfüg" being added to the index. In our case, we aggregate multiple search attachment fields together which results content being wrapped with this placeholder.

Proposed resolution

We add a simple check to see if the $extraction is not empty, and only add if it contains some type of output.

if (!empty($extraction)) {
     $field->addValue($extraction);
}